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TLS Online TPP Program

#Question id: 3729

What is a Klenow fragment?

#Unit 3. Fundamental Processes

  1. A fragment of DNA polymerase I that lacks 5ʹ → 3ʹ exonuclease activity.

  2. A topoisomerase responsible for unwinding DNA at the replication fork.

  3. A portion of the replisome responsible for RNA primer synthesis.

  4. Short stretches of DNA formed during polymerization of the lagging strand.

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TLS Online TPP Program

#Question id: 13034

#Unit 13. Methods in Biology

Which the following statements is/are true about the stacking gel?
i. The stacking gel solution contains acrylamide.
ii. It is on the top of the separating gel.
iii. It is used to dilute the protein sample before it enters the main separating gel.
iv. It is into this gel that the wells are formed and the proteins loaded.
TLS Online TPP Program

#Question id: 4561

#Unit 3. Fundamental Processes

Which factor recruits capping enzyme?
TLS Online TPP Program

#Question id: 2031

#Unit 4. Cell Communication and Cell Signaling

Antigen binding sites of an immunoglobulin are located in
TLS Online TPP Program

#Question id: 3500

#Unit 11. Evolution and Behavior

To call a behavior altruistic, an evolutionary biologist will have to demonstrate that

A) These behavior is decrease the individual fitness of the donor and increases the individual fitness of the recipient

B) These behavior is increases the individual fitness of both the donor and the recipient

C) Overall increase the inclusive fitness of the population

D) These behavior depend on genetic relation

Which of the following above statement is correct?
TLS Online TPP Program

#Question id: 4792

#Unit 8. Inheritance Biology

A number of all-white cats are crossed and they produce the following types of progeny: 12/16 all-white, 3/16 black and 1/16 gray. If the genotype black progeny is A_bb. Which of the following statement are correct?

a. Epistatic genes is recessive.

b. Epistatic gene is dominant

c. A gene is dominant epistatic

d. B gene is dominant epistatic

e. aa gene is recessive epistatic

f. bb gene is recessive epistatic