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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

  1. X-inactivation first occurs in the preimplantation female mammalian embryo.

  2. 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.

  3. 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.

  4. 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.

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TLS Online TPP Program

#Question id: 9588

#Unit 6. System Physiology – Plant

The light-absorbing antenna systems are organised in different manner, which of the following statements about antenna would be Incorrect?
TLS Online TPP Program

#Question id: 3596

#Unit 8. Inheritance Biology

Which of the following correct regarding test cross?

a) A testcross tests reveals the genotype of the individual

b)  Test cross detect linkage between gene

c) Same genotype and phenotype ratio present in test cross progeny

d) Phenotype ratio of test cross used to determine mode of inheritance either complete dominance or incomplete dominance
TLS Online TPP Program

#Question id: 2440

#Unit 2. Cellular Organization

Microtubule assembly in vitro requires

a. ATP.                                                           

b. a threshold (critical) concentration of tubulin.

c. warming the solution to 37°C.                   

d. microtubule-associated proteins.         

e. GTP.
TLS Online TPP Program

#Question id: 18003

#Unit 9. Diversity of Life Forms

In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg? 
1. micropyle 2. style 
3. ovary 4. stigma 
TLS Online TPP Program

#Question id: 1368

#Unit 4. Cell Communication and Cell Signaling

The following statements are made with reference to the characteristic of proteoglycans (major constituents of ECM). Which one of them is incorrect?