Practice Questions

TLS Online TPP Program

#Question id: 5678

Following process and their mechanism during fertilization in mammals.

a. Rheotaxis

i.A sensing mechanism in which, the oocyte and its accompanying

cumulus cells secrete molecules that attract capacitated

sperm toward the egg during the last stages of sperm migration

b. Chemotaxis

ii.It is a transient event, and sperm are given a relatively brief window of competence during which they can successfully fertilize the egg.

c. Capacitation

iii.it is the ability to sense temperature difference and preferentially swim from cooler to warmer sites is found only in capacitated sperm.

d. Thermotaxis

iv.Sperm receive long-distance directional cues from the flow of liquid from the oviduct to the uterus and they will migrate against the direction of the flow—using CatSper calcium channels to sense calcium influx and monitor the direction of the current

Which of the following option is correct?

#Unit 5. Developmental Biology

a-i, b-ii, c-iii, d-iv
a-iv, b-i, c-ii, d-iii
a-iv, b-iii, c-ii, a-i
a-i, b-iii, c-ii, a-iv

More Questions

TLS Online TPP Program

#Question id: 19492

#Unit 4. Cell Communication and Cell Signaling

Given below are certain statements regarding plant-pathogen interaction;

a) P/MAMPs binds on to the pattern recognition receptor (PRR) activates the plant defence PTI

b) PTI usually stronger than ETI

c) Avr is resistance gene carry by Solanum lycopersicum (tomato) act against Avrpto effector of pathogen Pseudomonas

d) Pathogen secreted effector molecules recognized by R-gene initiate a defence mechanism known as effector-triggered immunity

Which one of the following combination of above statement is correct?

TLS Online TPP Program

#Question id: 19491

#Unit 4. Cell Communication and Cell Signaling

R gene‐mediated defense also known as__

TLS Online TPP Program

#Question id: 19490

#Unit 4. Cell Communication and Cell Signaling

Successful pathogens that evade detection in turn impose selection on host, these selection for

TLS Online TPP Program

#Question id: 19313

#Unit 4. Cell Communication and Cell Signaling

Match the following effector molecules with their pathogen

Pathogen

Effector molecules

Function

A) Fusicoccum amygdali

i) HC‐toxin

a) inhibits salicylic acid (SA)‐mediated defense responses

B) Cochliobolus carbonum

ii) Coronatine

b) Constitutively activates the plasma membrane H+‐ATPase

C) Pseudomonas syringae

iii) Fusicoccin

c) Inhibits histone deacetylase activity

d) Opening of stomata

TLS Online TPP Program

#Question id: 19312

#Unit 4. Cell Communication and Cell Signaling

Hm1‐resistant maize plants are resistance for

TLS Online TPP Program

#Question id: 19311

#Unit 4. Cell Communication and Cell Signaling

which of the following pathogen produces HC-toxin?