Question: 3. Experiments conducted to determine which codon specified which amino acid included all of the …

3. Experiments conducted to determine which codon specified
which amino acid included all of the following EXCEPT:

  A. using mRNA homopolymers to determine the
specificity of the simplest codons.

B. using mRNA copolymers to determine which codons could specify
sets of amino acids.

C. using random mRNA polymers, to control ratios of nucleotides
to determine base composition of codons.

D. using ribosome binding and very short, specific mRNA
molecules.

E. Actually, all of these were used.

9. Other than glycine, side chains can differ from each other in
all of the following ways EXCEPT:

A. their size.

B. their shape.

C. their chirality.

D. their charge.

E. Actually, they can differ in all of these ways.

11. Charging of tRNA molecules:

A. involves proteins covalently attaching amino acids to the
correct tRNA molecules.

B. requires energy supplied by GTP.

C. provides the specificity of the genetic code.

D. A and C.

E. All of the above.

13. Amino acids consist of a central carbon surrounded by all of
the following EXCEPT:

  A. a methyl group.

B. an amino group.

C. a carboxylic acid group.

D. a side chain.

E. Actually, all of these are attached to the central
carbon.

14. Which of the following stages of translation does NOT depend
on base pairing?

A. charging of tRNA molecules

B. initiation

C. elongation

D. A and B