TLS Online

Previous Year Questions

Performance Meter

TLS Online TPP Program

QUESTION ID:1

Callus is defined as :

Mass of schlerenchymatous tissue with meristematic loci

Mass of parenchymatous tissue with meristematic loci

Mass of schlerenchymatous tissue with nonmeristematic loci

Mass of parenchymatous tissue with nonmeristematic loci

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40878&year=2026&month=March

QUESTION ID:2

The commonly used phytohormone for callus formation is :

ABA

Kinetin

2,4-D

Zeatin

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40879&year=2026&month=March

QUESTION ID:3

Plant somatic embryogenesis is a process that forms :

Biopolar structures having shoot apical meristems only

Unipolar structures having shoot apical meristems only

Bipolar structures having both shoot and root meristems

Amorphous structures having mass of undifferentiated cells

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40880&year=2026&month=March

QUESTION ID:4

What is the standard initial cell density for the initiation of a suspension culture ?

5 × 10² cells ml^-1

2 × 10³ cells ml^-1

5 × 10⁴ cells ml^-1

2 × 10² cells ml^-1

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40881&year=2026&month=March

QUESTION ID:5

Which gene is directly associated with shoot apical meristem formation ?

RCM1

CLAVATA3

PTN1

QC25

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40882&year=2026&month=March

QUESTION ID:6

The coating of synthetic seeds need not to have the following quality for successful field plantation :

Nondamaging to the embryo

Sufficiently durable

Maintaining high pH

Incorporating nutrients, and growth hormones

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40883&year=2026&month=March

QUESTION ID:7

A virus-free plant could be regenerated from a virus-infected plant mainly through :

Root culture

Callus culture

Ovule culture

Apical meristem culture

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40884&year=2026&month=March

QUESTION ID:8

Which of the following combination is effective in the regeneration of plant roots ?

High cytokinin / low auxin ratio

Low cytokinin / high auxin ratio

High cytokinin / high auxin ratio

Low auxin / low cytokinin ratio

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40885&year=2026&month=March

QUESTION ID:9

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : A single plant cell can be regenerated into a complete plantlet.

Reason (R) : Plant cells are totipotent in nature.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40886&year=2026&month=March

QUESTION ID:10

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : The process of somatic embryogenesis involves embryo induction, development and maturation stages.

Reason (R) : Auxin is not required for embryo initiation whereas embryo maturation requires high auxin concentration.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40887&year=2026&month=March

QUESTION ID:11

Plant shoot differentiation is a multi-step process which involves :

A. Differentiation of shoot meristem

B. Acquisition of competence to respond to the induction conditions

C. Establishment of shoots

D. Determination to form a specific organ

Choose the correct answer from the options given below :

D, B, A, C

C, A, B, D

B, D, A, C

A, D, B, C

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40888&year=2026&month=March

QUESTION ID:12

Select the correct sequence of events for plant somatic embryogenesis :

A. Production of torpedo stage embryos

B. Initiation of embryogenic callus

C. Formation of globular embryos

D. Production of green cotyledonary stage embryos

Choose the correct answer from the options given below :

B, C, A, D

A, D, C, B

B, A, D, C

D, C, B, A

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40889&year=2026&month=March

QUESTION ID:13

Select the correct sequence of steps involved in the isolation of protoplasts from the mesophyll cells of a plant leaf -

A. Culture of protoplast suspension

B. Infiltration of the enzyme into the leaf tissue

C. Incubate leaf pieces in filter-sterilized enzyme solution

D. Release of mesophyll protoplasts in solution

Choose the correct answer from the options given below :

B, C, D, A

A, D, C, B

C, B, D, A

C, D, B, A

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40890&year=2026&month=March

QUESTION ID:14

In vitro direct organogenesis using leaf explants involves which of the following processes ?

A. Dedifferentiation

B. Embryo formation

C. Callus formation

D. Redifferentiation

Choose the correct answer from the options given below :

A and C only

C and B only

D and A only

B and A only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40891&year=2026&month=March

QUESTION ID:15

Which of the following phytohormone is a derivative of adenine ?

A. BAP

B. ABA

C. NAA

D. TDZ

Choose the correct answer from the options given below :

A and B only

B and C only

C and D only

D and A only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40892&year=2026&month=March

QUESTION ID:16

Why is the apical meristem tissue usually lacking the presence of plant viruses ?

A. High metabolic activity in meristematic cells

B. Absence of vascular system in the meristem

C. Low endogenous auxin level

D. High concentration of sugar

Choose the correct answer from the options given below :

B and D only

A and B only

D and A only

B and C only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40893&year=2026&month=March

QUESTION ID:17

Match List - I with List - II.

List - I	List - II
A. Nicotinic acid	I. Induction of cell division and callus formation
B. Cytokinin	II. Source of organic nitrogen
C. Casein hydrolysate	III. Shoot induction
D. Auxin	IV. Vitamin component of MS media

Choose the correct answer from the options given below :

A-I, B-II, C-III, D-IV

A-III, B-I, C-IV, D-II

A-IV, B-III, C-II, D-I

A-IV, B-III, C-I, D-II

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40894&year=2026&month=March

QUESTION ID:18

Match List - I with List - II.

List - I	List - II
A. Morel and Martin	I. Cultured isolated plant cells in a simple nutrient solution
B. Skoog and Miller	II. Formation of embryos from somatic cells
C. Haberlandt	III. Chemical control of organogenesis
D. Steward and Reinert	IV. Meristem culture to raise virus-free plants

Choose the correct answer from the options given below :

A-IV, B-III, C-I, D-II

A-III, B-II, C-I, D-IV

A-II, B-I, C-IV, D-III

A-IV, B-I, C-II, D-III

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40895&year=2026&month=March

QUESTION ID:19

Match List - I with List - II.

List - I	List - II
A. Potassium nitrate	I. Micronutrient
B. Potassium iodide	II. Gelling agent
C. Thiamine	III. Vitamin
D. Isabgol	IV. Macronutrient

Choose the correct answer from the options given below :

A-III, B-IV, C-II, D-I

A-IV, B-I, C-III, D-II

A-I, B-III, C-II, D-IV

A-I, B-IV, C-III, D-II

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40896&year=2026&month=March

QUESTION ID:20

Which treatment is preferred to develop fertile dihaploid plants generated from pollen culture ?

ABA treatment

NAA treatment

Trifluralin treatment

DEPC treatment

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40897&year=2026&month=March

QUESTION ID:21

After colchicine treatment of a plant regenerated through androgenesis, the derived plant is considered as :

Diploid

Dihaploid

Amphidiploid

Allopolyploid

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40898&year=2026&month=March

QUESTION ID:22

Gynogenic plant is not produced through :

Ovule culture

Floral bud culture

Ovary culture

Axillary bud culture

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40899&year=2026&month=March

QUESTION ID:23

The process of developing gynogenic plant from egg cell is called :

Parthenogenesis

Apogenesis

Androgenesis

Embryogenesis

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40900&year=2026&month=March

QUESTION ID:24

Which plant cells could be cultured to develop haploid plants ?

Anther wall cells

Pollen mother cells

Pollen grains

Stomata cells

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40901&year=2026&month=March

QUESTION ID:25

How much sucrose is generally required for the initiation of androgenesis in plants ?

Up to 1.5%

Up to 2.5%

Up to 3.5%

More than 5.0%

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40902&year=2026&month=March

QUESTION ID:26

The main advantage of haploid plants in crop breeding program is :

High homozygosity

High heterozygosity

Null mutations

High allelic expression

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40903&year=2026&month=March

QUESTION ID:27

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Chromosome number may change under prolonged plant tissue culture regimes.

Reason (R) : Endosperm cells are triploid in nature.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40904&year=2026&month=March

QUESTION ID:28

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Haploid plants can be produced through in vitro culture of plant gametic cells.

Reason (R) : Accurate phenotyping in plant breeding with double haploidy is possible because of their segregating nature.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40905&year=2026&month=March

QUESTION ID:29

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Gynogenic haploids have been developed by determining the optimum stage of male gametophytic development.

Reason (R) : Late uninucleate to trinucleate stage of megaspore development is preferred for the production of gynogenic haploids.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40906&year=2026&month=March

QUESTION ID:30

The correct sequence of producing androgenic haploids of Nicotiana tabacum is :

A. Anthers burst to release the pollen derived embryo

B. Collection of flower buds

C. Isolation and growth of plantlets emerging from the anthers

D. Placing the anthers on the MS medium

Choose the correct answer from the options given below :

B, A, D, C

C, A, B, D

B, D, A, C

A, D, B, C

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40907&year=2026&month=March

QUESTION ID:31

For the production of mulberry triploid plants :

A. Wash the roots of plants and transfer them to small pots

B. Culture on MS medium containing BAP and NAA

C. Seed surface sterilization

D. Excision of endosperm

Choose the correct answer from the options given below :

D, B, A, C

C, D, B, A

B, D, A, C

A, B, D, C

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40908&year=2026&month=March

QUESTION ID:32

Haploid production in barley following interspecific hybridization usually involves :

A. Pollen collection and cross pollination

B. Embryo culture

C. Emasculation

D. Colchicine treatment

Choose the correct answer from the options given below :

A, B, D, C

C, A, D, B

A, D, C, B

C, A, B, D

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40909&year=2026&month=March

QUESTION ID:33

Gametoclonal variations from changes in chromosome number/structure may arise due to which of the following :

A. Polyploidy

B. Aneuploidy

C. Translocations and inversions

D. Reduction division

Choose the correct answer from the options given below :

A, C and D only

B, A and D only

C, B and A only

D, C and B only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40910&year=2026&month=March

QUESTION ID:34

Haploid embryos are produced in vivo by :

A. Karyogenesis

B. Parthenogenesis

C. Meiosis

D. Pseudogamy

Choose the correct answer from the options given below :

C and A only

A and B only

B and D only

D and C only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40911&year=2026&month=March

QUESTION ID:35

Doubling of the chromosome number may be achieved by :

A. Use of spindle inhibitors

B. Marker-assisted breeding

C. Fusion of unreduced gametes

D. Protoplast fusion

Choose the correct answer from the options given below :

A, C and D only

B, A and D only

C, B and A only

D, C and B only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40912&year=2026&month=March

QUESTION ID:36

Match List - I with List - II.

Choose the correct answer from the options given below :

List - I	List - II
A. Homogeneous preparation of pollen during androgenesis	I. By mutagenesis or genetic engineering
B. Pollen can be genetically modified	II. By culture of isolated pollen grains
C. Gametophytic to sporophytic development is studied	III. By transfer to light regimes
D. Visible pollen embryos are advanced to cellular differentiation	IV. By gradient centrifugation

Choose the correct answer from the options given below :

A-IV, B-I, C-II, D-III

A-III, B-II, C-IV, D-I

A-I, B-III, C-II, D-IV

A-II, B-IV, C-I, D-III

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40913&year=2026&month=March

QUESTION ID:37

Match List - I with List - II.

Choose the correct answer from the options given below :

List - I	List - II
A. Somatic polyploidy	I. Dihaploid production
B. Source for haploid production	II. Genetic variations
C. Callus-derived plants	III. Endoreduplication
D. Chromosome doubling of microspore-driven embryos	IV. Uninucleate pollen

Choose the correct answer from the options given below :

A-II, B-I, C-IV, D-III

A-III, B-IV, C-II, D-I

A-I, B-II, C-III, D-IV

A-IV, B-III, C-I, D-II

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40914&year=2026&month=March

QUESTION ID:38

Match List - I with List - II.

Match the following during the process of androgenesis in plant.

List - I	List - II
A. Induction	I. Nuclear fusion after first androgenic division
B. Segmentation	II. Bursting of the pollen wall and embryogenesis
C. Diploidization	III. Dedifferentiation of pollen cells
D. Regeneration	IV. Formation of multicellular structure

Choose the correct answer from the options given below :

A-I, B-II, C-IV, D-III

A-II, B-IV, C-III, D-I

A-III, B-IV, C-I, D-II

A-IV, B-III, C-I, D-II

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40915&year=2026&month=March

QUESTION ID:39

Which of the following mechanism is not causing somaclonal variations ?

Numerical change in chromosome number

Gene mutations

Gene amplification

Gene transcription

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40916&year=2026&month=March

QUESTION ID:40

The osmotically fragile protoplasts look completely spherical under microscope in which of the following solution ?

Hypotonic

Hypertonic

Slightly hypotonic

Slightly hypertonic

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40917&year=2026&month=March

QUESTION ID:41

Which of the following secondary metabolites is not commercially produced in vitro in a plant cell culture system ?

Shikonin

Gossypol

Berberin

Taxol

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40918&year=2026&month=March

QUESTION ID:42

In most of the somatic hybridization events in plants, which cells are preferred to be used ?

Mesophyll protoplasts

Embryogenic callus

Apical meristem

Xylem vessels

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40919&year=2026&month=March

QUESTION ID:43

Which of the following is used for the visual assessment of percentage viability of protoplasts ?

Fluorescein diacetate

Myo-inositol

Biotin

Sodium molybadate

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40920&year=2026&month=March

QUESTION ID:44

Which of the following culture type is the most suitable for the generation of somaclonal variations ?

Seed culture

Embryo culture

Callus culture

Nodal culture

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40921&year=2026&month=March

QUESTION ID:45

Which technique is not used for the analysis of hybrid cells formed by the fusion of two unrelated protoplasts ?

Fluorescence in situ hybridization

Northern blotting

Isozyme analysis

RFLP

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40922&year=2026&month=March

QUESTION ID:46

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : The hybrid cells formed by the fusion of two unrelated diploid protoplasts combine a set of three genomes from the parents.

Reason (R) : Partial or complete elimination of nuclear genome before regeneration leads to the formation of cybrid plants.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40923&year=2026&month=March

QUESTION ID:47

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : One of the major limitations of genetic engineering is the difficulty in transferring polygenic traits in plants.

Reason (R) : Cybridization generates novel combinations of nuclear and/or cytoplasmic genomes, which is not possible through sexual hybridization.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40924&year=2026&month=March

QUESTION ID:48

Mention the correct sequence of events for the isolation of protoplasts from embryogenic suspension cultures of rice.

A. Excise yellow/white compact and nudular embryogenic callus

B. Staining with fluorescein diacetate

C. Filter the cell suspension through a nylon sieve

D. Filter the protoplast suspension through sieves

Choose the correct answer from the options given below :

A, B, D, C

A, C, D, B

C, B, A, D

C, D, B, A

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40925&year=2026&month=March

QUESTION ID:49

The steps involved in the process of somatic hybridization are :

A. Regeneration of hybrid plants

B. Fusion of the protoplasts of desired species/varieties

C. Isolation of protoplasts

D. Identification and selection of somatic hybrid cells

Choose the correct answer from the options given below :

A, B, D, C

A, C, D, B

C, B, D, A

C, D, B, A

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40926&year=2026&month=March

QUESTION ID:50

Arrange the given steps for inducing somaclonal variations during androgensis in correct order :

A. Dedifferentiation

B. Diploidization

C. Regeneration

D. Callogenesis

Choose the correct answer from the options given below :

B, D, A, C

A, B, D, C

C, B, D, A

A, D, C, B

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40927&year=2026&month=March

QUESTION ID:51

Which enzymatic treatment is used for the efficient isolation of protoplasts from plant cells ?

A. Pectinase

B. Nitrogenase

C. Cellulase

D. Cellulose synthase

Choose the correct answer from the options given below :

A and D only

A and C only

B and D only

B and C only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40928&year=2026&month=March

QUESTION ID:52

Which are widely used techniques to fuse plant protoplasts ?

A. Chemical fusion by PEG

B. Electric stimulation

C. High Ca²⁺-high pH method

D. Particle gun method

Choose the correct answer from the options given below :

A, C and D only

B, A and C only

A, B and D only

B, C and D only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40929&year=2026&month=March

QUESTION ID:53

Which of the following are used as osmotic stablizers for the maintenance of protoplasts ?

A. Glucose

B. Mannitol

C. PEG

D. Sorbitol

Choose the correct answer from the options given below :

A, C and D only

B, A and C only

A, B and D only

B, C and D only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40930&year=2026&month=March

QUESTION ID:54

Match List - I with List - II.

List - I	List - II
A. Loss of genes	I. Duplication
B. Alteration of gene order	II. Deletion
C. Gene multiplication	III. Translocation
D. Movement of chromosome segments to new location	IV. Inversion

Choose the correct answer from the options given below :

A-I, B-II, C-IV, D-III

A-II, B-IV, C-I, D-III

A-III, B-IV, C-I, D-II

A-II, B-III, C-I, D-IV

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40931&year=2026&month=March

QUESTION ID:55

Match List - I with List - II.

Match the following secondary plant products produced in plant cell suspension culture with their sources.

List - I	List - II
A. Azadirachtin	I. Adhatoda vasica
B. Cathin	II. Azadirachta indica
C. Vasicine	III. Catharanthus rosesus
D. Ajmalicine	IV. Bruce ajavanica

Choose the correct answer from the options given below :

A-I, B-II, C-IV, D-III

A-II, B-IV, C-III, D-I

A-II, B-III, C-I, D-IV

A-II, B-IV, C-I, D-III

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40932&year=2026&month=March

QUESTION ID:56

Match List - I with List - II.

List - I	List - II
A. Pectinase	I. Herbicide
B. Mannitol	II. Stain dead cells
C. Phenosafranin	III. Metabolically inactive sugar
D. Atrazine	IV. Degrade middle lamella

Choose the correct answer from the options given below :

A-I, B-II, C-IV, D-III

A-II, B-IV, C-III, D-I

A-IV, B-III, C-II, D-I

A-IV, B-II, C-I, D-III

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40933&year=2026&month=March

QUESTION ID:57

Nitrogen-fixing bacteria convert atmospheric nitrogen into which product ?

NO₃⁻

NO₂

Amino acids

NH₄+

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40934&year=2026&month=March

QUESTION ID:58

Which of the soil bacteria convert ammonium into nitrite ?

Nitrogen-fixing bacteria

Nitrifying bacteria

Denitrifying bacteria

Ammonifying bacteria

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40935&year=2026&month=March

QUESTION ID:59

How many ATP molecules are required to produce two NH₃ molecules during nitrogen fixation ?

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40936&year=2026&month=March

QUESTION ID:60

Which of the following organism is a free living diazotroph ?

Frankia sp.

Rhizobium leguminosarum

Azotobacter vinelandii

Azorhizobium caulinodans

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40937&year=2026&month=March

QUESTION ID:61

The conversion of ammonia or ammonium ions to nitrite followed by its oxidation to nitrate is called is :

Denitrification

Nitrogen assimilation

Nitrification

Nitrogenation

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40938&year=2026&month=March

QUESTION ID:62

Which of the following is not a phosphate solubilizing microorganism ?

Bacillus sp.

Penicillium sp.

Aspergillus sp.

Frankia sp.

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40939&year=2026&month=March

QUESTION ID:63

Which enzyme catalyzes the conversation of molecular N₂ to NH₃ ?

Dehydrogenase

Nitrogenase

Oxygenase

Desaturase

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40940&year=2026&month=March

QUESTION ID:64

Which is not a free-living asymbiotic nitrogen fixation microorganism ?

Rhodospirillum

Rhizobium

Nostoc

Anabaena

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40941&year=2026&month=March

QUESTION ID:65

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Uptake of hydrogenase activity is a mechanism of removing hydrogen from the site of nitrogenase activity which concurrently carries out reactions of nitrogen fixation and hydrogen production.

Reason (R) : Acetylene reduction technique is a common method of measuring nitrogenase activity.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40942&year=2026&month=March

QUESTION ID:66

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Manure is an organic substance that is obtained from decomposition of vegetable and animal waste.

Reason (R) : Manure is readily soluble in water thus it is absorbed by plants quickly.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40943&year=2026&month=March

QUESTION ID:67

The steps involved in the process of soyabean root nodule formation are :

A. Bacteria emits signals to stimulate root hairs to elongate

B. Cortex and pericycle cells begin division

C. Roots emits signals to attract Rhizobium

D. Bacteria within vesicles develop into bacteroids

Choose the correct answer from the options given below :

B, C, D, A

C, A, B, D

A, C, B, D

D, A, C, B

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40944&year=2026&month=March

QUESTION ID:68

Find the correct order for the conversion of organic form of nitrogen into inorganic form by soil microorganisms.

A. Formation of nitrites

B. Formation of ammonia

C. Formation of free nitrogen

D. Formation of nitrates

Choose the correct answer from the options given below :

B, C, D, A

C, D, A, B

D, A, B, C

B, A, D, C

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40945&year=2026&month=March

QUESTION ID:69

Mention the correct sequence of the formation of compounds during biological nitrogen fixation.

A. Hydrazine

B. Nitrogen

C. Ammonia

D. Diamide

Choose the correct answer from the options given below :

A, D, C, B

C, D, A, B

D, A, B, C

B, D, A, C

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40946&year=2026&month=March

QUESTION ID:70

Which inorganic form(s) of nitrogen do plants assimilate ?

A. Amino acids

B. NH₄+

C. NO₃-

D. NO₂-

Choose the correct answer from the options given below :

A and C only

B and C only

C and D only

D and A only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40947&year=2026&month=March

QUESTION ID:71

Which factors do show considerable influence on the activity of nitrogenase enzyme during N₂ fixation ?

A. Molybdenum

B. Molecular H₂

C. Boron

D. Leghemoglobin

Choose the correct answer from the options given below :

A, C and D only

B, C and D only

C, B and A only

D, A and B only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40948&year=2026&month=March

QUESTION ID:72

Which are the symbiotic nitrogen-fixing bio-fertilizers ?

A. Rhizobium

B. Azotobacter

C. Azospirillum

D. Azollae

Choose the correct answer from the options given below :

A and C only

B and D only

C and B only

D and A only

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40949&year=2026&month=March

QUESTION ID:73

Match List - I with List - II.

List - I	List - II
A. Nostoc	I. Anaerobic
B. Azotobacter	II. Photosynthetic anaerobe
C. Clostridium	III. Aerobic
D. Chromatium	IV. Heterocyst

Choose the correct answer from the options given below :

A-IV, B-II, C-I, D-III

A-II, B-IV, C-III, D-I

A-IV, B-III, C-I, D-II

A-II, B-IV, C-I, D-III

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40950&year=2026&month=March

QUESTION ID:74

Match List - I with List - II.

List - I	List - II
A. nif genes	I. Formation of root nodules
B. nod genes	II. Maintenance of N₂-fixation
C. fix genes	III. Functional hydrogenase
D. hup genes	IV. Functional nitrogenase

Choose the correct answer from the options given below :

A-II, B-I, C-IV, D-III

A-II, B-IV, C-III, D-I

A-IV, B-III, C-I, D-II

A-II, B-IV, C-I, D-III

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40951&year=2026&month=March

QUESTION ID:75

Match List - I with List - II.

List - I	List - II
A. Bacillus and Pseudomonas	I. Symbiotic biofertilizer
B. Azotobacter	II. Phosphate absorber
C. Mycorrhizal fungi	III. Free living biofertilizer
D. Rhizobium	IV. Phosphate solubilizer

Choose the correct answer from the options given below :

A-I, B-II, C-IV, D-III

A-II, B-IV, C-III, D-I

A-IV, B-III, C-II, D-I

A-II, B-IV, C-I, D-III

https://triyambak.org/courses/cuet-pg/tpp/pyq?qid=40952&year=2026&month=March