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TLS Online TPP Program

#Question id: 7240

Given below are the list of some organism (column A) and determination of their dorsal-ventral axis (column B)

S.No.

Organism

(Column A)

S.No

Determination of dorsal ventral axis

(Column B)

A.

Chick

i.

sperm entry point and cortical rotation

lead to specification of dorsal side opposite the

point of sperm entry

B.

Zebrafish

ii.

initial symmetry-breaking event unknown.

Localization of maternal Ndr1 and nuclear b -catenin species dorsal side and position of organizer

C.

Xenopus

iii.

interaction between inner cell mass

and trophectoderm

D

Mouse

iv.

posterior marginal zone specifies ventral end

of dorso-ventral axis

 Choose the correct option:

#Unit 5. Developmental Biology
  1. A-iv, B-ii, C-i, D-iii
  2. A-ii, B-i, C-iii, D-iv
  3. A-i, B-ii, C-iii, D-iv
  4. A-iv, B-iii, C-I, D-ii
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TLS Online TPP Program

#Question id: 12641

#Unit 6. System Physiology – Plant

 Among the diverse components of plant defense arsenals are proteins that interfere with herbivore digestion, Given some defense compound of plants in column I with its given action in column II

Column I

column II

I)  α-amylase inhibitors

a) Antidigestive proteins, block the action of herbivore proteolytic enzymes. After entering the herbivore’s digestive tract, they hinder protein digestion by binding tightly and specifically to the active site of protein-hydrolyzing enzymes such as trypsin and chymotrypsin

II) Lectins

b) block the action of the starch-digesting enzyme

III) proteinase inhibitors

c) A defensive proteins that bind to carbohydrates or carbohydrate-containing proteins. After being ingested by an herbivore, bind to the epithelial cells lining the digestive tract and interfere with nutrient absorption
Correctly match the defence compound withits action on herbivore;
TLS Online TPP Program

#Question id: 4671

#Unit 3. Fundamental Processes

CpG island promoters are methylated at position 5 of the pyrimidine ring. CG sequences are thought to be underrepresented in mammalian genomes because
TLS Online TPP Program

#Question id: 23103

#Unit 2. Cellular Organization

What is 1st level of compaction while making/packaging the nucleosome  
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#Question id: 26983

#Unit 10. Ecological Principles

Plant life histories based on a model in which stress, disturbance, and competition are the important selective factors.
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#Question id: 5596

#Unit 5. Developmental Biology

The functional maturation of sperm after they have been deposited in the female reproductive tract, known as