Deck 11: From DNA to Proteins: Translation

Question 1

Which is true regarding the binding of an amino acid to a tRNA?
a.Amino acids bind to the 5' end of the tRNA.
b.The binding of amino acids requires GTP.
c.There is one aminoacyl trans-tRNA synthetase that binds all amino acids to all tRNAs.
d.When tRNAs release an amino acid,it is called tRNA charging.
e.None of the above is true.

Answer 1

None of the above is true.

Question 2

What cellular structure helps properly fold some proteins?
a.ribosomes
b.ribozymes
c.signal sequences
d.molecular chaperones

Answer 2

m olecular chaperones

Question 3

The formation of peptide bonds during elongation is catalyzed by an enzyme called the ribozyme.The ribozyme is made of what macromolecule?
a.protein in the large subunit of the ribosome
b.protein in the small subunit of the ribosome
c.rRNA in the large subunit of the ribosome
d.rRNA in the small subunit of the ribosome
e.tRNA

Answer 3

rRNA in the large subunit of the ribosome

Question 4

Any given DNA sequence has ______ possible reading frames,and the correct one is set by an___________________.
a.2; termination codon
b.4; initiation codon
c.3; initiation codon
d.3; termination codon
e.2; initiation codon

Question 5

The wobble rules account for non-Watson and Crick nucleotide pairing at which position of the codon and anticodon,respectively?
a.first and third
b.first and second
c.second and second
d.third and first
e.third and second

Question 6

If instead of 20 amino acids there were 200 amino acids,then how many nucleotides would you predict to be in a codon?
a.2
b.3
c.4
d.5
e.6