Most proteins denature at both high and low pH. At high pH, the ionization of internal tyrosines is thought to be the main destabilizing influence, whereas at low pH, the protonation of buried histidines. A titration curve for the unfolding of the enzyme ribonuclease is shown in Figure. Given the relation between the titration curves for protein unfolding and histidine protonation, which of the following conclusion can be drawn correctly?

A. The sharp transition in graph indicates a highly cooperative process; when the protein starts to unfold, it completes the process rapidly

B. The sharp transition in graph indicates a highly noncooperative process

C. Several buried histidines can ionize when the chain starts to unfold, so that when one goes, they all go together due to cooperative behaviour of protein folding

D. Buried histidine (pK of 4 in this example) becomes accessible to solvent, its pK will shift toward its normal value of 6, significantly steepening its titration curve.

#Question id: 3495

#Unit 11. Evolution and Behavior

Which one of the following statements is incorrect?

#Question id: 3494

#Unit 11. Evolution and Behavior

Which of the following is a disadvantage of group living for many species?

a. Competition between individuals for resources is increased

b. It can reduce predator success

c. It can reduce reproductive success

d. It increased transmission of parasites and other diseases

#Question id: 3493

#Unit 11. Evolution and Behavior

Which of the following is incorrect?

#Question id: 3492

#Unit 11. Evolution and Behavior

A mother goat can recognize its own kid by smell, types of animal behavior

A) Operant conditioning

B) Learn behavior

C) Innate behavior

D)  Imprinting

#Question id: 3491

#Unit 11. Evolution and Behavior

Some dogs love attention, and learns that if he barks, he gets attention. Which of the following might you use to describe this behavior?

A) The dog is displaying an instinctive fixed action pattern.

B) The dog is trying to protect its territory.

C) The dog has been classically conditioned.

D) The dog's behavior is a result of operant conditioning

E) The dog is displaying controlled by external stimuli

#Question id: 3490

#Unit 11. Evolution and Behavior

Given below are some behaviors strategies.

A) Fixed action pattern, complex sequence of behavior, Once released and continuous to completion, even when there is change in surrounding environment

B)  natural selection select that territorial behavior that is benefit is greater than cost 

C) Imprinting, a form of learning in which a very young animal fixes its attention on the first object with which it has visual, auditory, or tactile experience

D) Donor benefits at a cost to the recipient, the behavior is altruistic; when the recipient benefits at a cost to the donor, the behavior is selfish.

Which one of the following correct combination of true and false?