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In: Biology

Questions 1. Which of the following is true for the omega angle in the protein backbone?...

Questions

1. Which of the following is true for the omega angle in the protein backbone?

a. it equals 180 degrees.

b. the orientation of the bonds around the peptide bonds is Cis.

c. it may have any value between 0 to 180.

d. the most common values of omega angel are 60 to 120.

2. Which of the following can not apply to heat shock protein?

a. They are proteins found only in eukaryotes.

b. They form complexes with unfolded cellular protein which cannot fold spontaneously, to help them fold properly.

c. the protein to be folded is held with a chamber of the chaperonin protein complex.

d. If a protein released from chaperonin has not been folded properly, the heat shock proteins can bind the unfolded to make another folding.

Expert Solution

Ans. - 1

The torsion angle phi and psi provide the flexibility required for the polypeptide backbone to adopt a certain fold, since the third possible torsion angle within the protein backbone called omega is essentially flat and fixed to 180 degrees

So, option a is correct.

Ans. - 2

Heat shok protein found in both eukeryotic and prokeryotic cell with high sequences similarity. HSP can interact with immune cell and produce antibody response. This effect seen in different bacterial cells such Helicobacter pylari and Mycobacterium leprae.

So. Option a is a incorrect statement about heat protein.

gladiator answered 1 year ago

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