1. In the genetic code, the length of a codon
is

A.  1 base

B.  2 bases

C.  3 bases

D.  4 bases

2. The ability of some tRNA’s to bind to more than one
codon is called

A.  slop

B.  inosine

C.  wobble

D.  fluctuation

3. A synthetic mRNA is composed of 3 parts uracil and 1
part cytosine, this mRNA would code for a protein that contained
approximately what proportion of proline (Pro) (genetic code is on
page 297 of your textbook)?

A.  27/64

B.  1/64

C.  4/64

D.  3/64

4. During protein synthesis, how many equivalents of ATP
are used for each peptide bond?

A.  1

B.  2

C.  3

D.  4

5. During protein synthesis, the peptide chain is
synthesized in the

A.  amino to carboxyl
direction

B.  carboxyl to amino
direction

C.  phosphoryl to hydroxy
direction

D.  hydroxy to phosphoryl
direction

6. In which of the following groups of organisms could you
expect to find polysomes?

A.  grasses

B.  frogs

C.  bacteria

D.  yeast

7. If there were only the bases adenine and thymine, how
long would a codon have to be for there to be enough codons to
specify 20 amino acids.

A.  3

B.  4

C.  1

D.  5

E.  6

8. The start codon for translation in prokaryotes
is

A.  3′ – A – U – G – 5′

B.  5′ – U – U – A – 3′

C.  5′ – A – U – G – 3′

D.  3′ – M – E – T –
5′

9. During peptide elongation, the charged tRNA is added at
the

A.  P site of the
ribosome

B.  A site of the
ribosome

C.  active site of the
tRNA-aminoacyl synthetase

D.  signal peptidase

10. A mutation that adds or deletes a base pair from DNA
is

A.  a frameshift
mutation

B.  a nonsense mutation

C.  a missense mutation

D.  an aneuploid
condition