Practice Questions

TLS Online TPP Program

#Question id: 2871

With respect to X-chromosome inactivation in females, which, if any, of the following statements is incorrect?

#Unit 2. Cellular Organization

X-inactivation first occurs in the preimplantation female mammalian embryo.
One of the two X chromosomes in each diploid cell of a normal woman is randomly selected to undergo X-inactivation and becomes highly condensed.
The process involves epigenetic silencing of each gene on one of the two X chromosomes, either the maternal X chromosome or the paternal X chromosome.
Once the decision is made to inactivate a paternal X or the maternal X in a cell, all descendant cells will continue with that pattern of X-inactivation.

More Questions

TLS Online TPP Program

#Question id: 20320

#Unit 4. Cell Communication and Cell Signaling

What processes controlled by quorum sensing-

a. Bioluminescence

b. Production of virulence factors

c. Formation of biofilms

d. Competence for uptake of DNA

e. Antibiotic production

Which one of the following combinations of above statements is correct?

TLS Online TPP Program

#Question id: 33304

#Unit 1. Molecules and their Interaction Relevant to Biology

For the given equation, If plot is drawn is between Km’ and I, what will be intercept of X axis

TLS Online TPP Program

#Question id: 11345

#Unit 2. Cellular Organization

Which enzyme of citric acid cycle present in inner membrane of mitochondria?

TLS Online TPP Program

#Question id: 15881

#Unit 12. Applied Biology

Protoplast is____

TLS Online TPP Program

#Question id: 5610

#Unit 5. Developmental Biology

The acrosome reaction involves the extension of the acrosomal Process: