Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 9309
TLS Online TPP Program

#Question id: 12527

Which of the following is the incorrect prediction about ABA translocation in vascular tissue by both the xylem and the phloem?

#Unit 6. System Physiology – Plant
  1. ABA synthesized in the roots can also be transported to the shoot via the xylem
  2. the concentration of ABA in the xylem sap of well-watered sunflower plants is between 1.0 and 15.0 nM, while in in waterstressed plants increases to as much as 3000 nM (3.0 µM )
  3. Concentration of 15.0 nM ABA in the apoplast is sufficient to close stomata, all of the ABA in the xylem stream reaches the guard cells
  4. ABA also is transported in a conjugated form, then released by hydrolysis in leaves.
More Questions
TLS Online TPP Program

#Question id: 7313

#Unit 5. Developmental Biology

Which of the following statement incorrect about the meristem?
TLS Online TPP Program

#Question id: 7314

#Unit 5. Developmental Biology

With reference to plant flowering pattern; match the terms of Column I with the most appropriate term of Column II. (Se-Sepal; Ca-Carpel; St-stamen; Pe-Petal)

s.no.

Homeotic mutants

(Column 1)

S. No

Flower patterning

(Column 2)

A.     

Apetala2 mutant

                    I.  

Ca-Ca-Ca-Ca

B.      

Agamous /Apetala3 mutant

                    II.    

Se-Pe-Pe-Se

C.      

Agamous mutant

               III. 

Se-Se-Se-Se

D.     

Apetala2/Apetala3 mutant

                IV.

Ca-St-St-Ca

 
TLS Online TPP Program

#Question id: 7315

#Unit 5. Developmental Biology

Following pathway represents apoptosis in drosophila. Identify the proteins A-D sequentially.
TLS Online TPP Program

#Question id: 7316

#Unit 5. Developmental Biology

Programmed cell death, or apoptosis, is an essential part of animal development. In the nematode, with its invariant cell lineage, particular cell lineages or particular cells within specific lineages are destined to end in programmed cell death, and it was this feature that allowed the identification of the process and the analysis of its genetic control.

Which of the following combination of genes are correct?
TLS Online TPP Program

#Question id: 7751

#Unit 5. Developmental Biology

Ultrastructural studies have led to the characterization of two distinctive cytological
pathways of PCD in plants;
I) Vacuolar-type PCD
II) Hypersensitive response-type (HR-type) PCD
a) cytosol and all its organelles, including the plasma membrane, are completely brokendown
b) The vacuole loses water, resulting in marked cell shrinkage, contraction from the cell wall,
and nuclear DNA degradation
c) PCD occurs in leaves in response to microbial attack
d) cell wall is either partially or completely digested as well, as in endosperm tissue
e) Continued water loss from the cytosol leads to the breakdown of the plasma membrane
and the release of residual cellular contents into the apoplast
Given characterization of PCD pathway match with its type PCD?
TLS Online TPP Program

#Question id: 7752

#Unit 5. Developmental Biology

The autophagy pathway included____
a) the catabolic mechanism that delivers cellular components to lysosomes, where they are degraded
b) Autophagy protects the cell from the harmful or lethal effects of damaged or unnecessary proteins and organelles
c) During starvation, the autophagic breakdown and recycling of cellular components also
ensure cellular survival by maintaining cellular energy levels
Which of the following are the correct prediction about autophagy is true?