1. Which molecule allows the release of mRNA from a stalled ribosome? Select one

ID: 48656 • Letter: 1

Question

1. Which molecule allows the release of mRNA from a stalled ribosome?

Select one:

a. miRNA

b. incRNA

c. snoRNA

d. tmRNA

e. siRNA

2. Which of the following statements about protein folding and post translational modifications of proteins is correct?

Select one:

a. Attachment of a protein called ubiquitin directs proteins to enter into the nucleus.

b. Signal sequence of a protein helps direct a protein to a specific location within the cell.

c. Amino acids within a protein may be modified by molecular chaperones.

d. All nascent polypeptide chains have intrinsic ability to fold into the active conformation based on the primary structure.

e. Only eukaryotic proteins undergo alterations following translation.

3. The genetic code is said to be degenerate because:

Select one:

a. there are more codons than amino acids.

b. there are more amino acids than codons.

c. different organisms use different codons to encode the same amino acid.

d. some codons specify more than one amino acid.

e. there are more tRNAs than amino acids.

1)tm RNA is the right answer because it binds with the A site and causes release of stalled ribosome

2) d is the right answer . all have the ability to fold and form secondary and then teritiary structure

3) c , this is the reason because more than one codon sequence can code for same amino acid

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