BIO 3 EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
The elongation of the leading strand during DNA synthesis? - correct answer ✔✔ Occurs 5' to 3'
Describe DNA Polymerase - correct answer ✔✔ Needs a primer to add dNTPs to the new strand
and is active on both the leading and lagging strands
Each amino acid in a protein is specified by what? - correct answer ✔✔ A codon
What does a primase do? - correct answer ✔✔ Makes an RNA strand that "primes" DNA
synthesis
If an mRNA codon reads UAC, its complementary anticodon will be what? - correct answer ✔✔
AUG
Molecules at the replication for include all of the following except? - correct answer ✔✔ G
protein coupled receptors
Identify the polypeptide that would be produces as a result of transcribing and translating the
following DNA sequence:
DNA: ...3' A C C A A G T C T 5' - correct answer ✔✔ trp-phe-arg
True or False: When lactose is not present in the environment allolactose binds to the lac
repressor and carries out transcription. - correct answer ✔✔ FALSE
DNA replication is what? - correct answer ✔✔ Semi-conservative
, If one strand of a DNA molecule has the base sequence ATTGACAT, its complementary strand
will have the sequence: - correct answer ✔✔ TAACGTA
A eukaryotic cell can copy its chromosomes rapidly because why? - correct answer ✔✔ There
are many origins of replication
Addition of a 5' cap, poly-A-tail, and intron/exon processing all happen to which of the following
molecules? - correct answer ✔✔ pre-mRNA
Where are Okazaki fragments found? - correct answer ✔✔ On the lagging strand
What happens during initiation of transcription? - correct answer ✔✔ RNA polymerase bind to
promoters on the DNA
Which of the following is NOT true of a codon? - correct answer ✔✔ It cannot code for more
than one amino acid
Which of the follow is true regarding positive bacterial gene regulation for the lac operon? -
correct answer ✔✔ The lac operon is off when high glucose levels are present
What happens during initiation of translation? - correct answer ✔✔ The ribosome binds to the
mRNA and the tRNa carrying methionine binds to the start codon
What does elongation of a polypeptide chain involve? - correct answer ✔✔ The formation of a
peptide bond between the growing polypeptide in the P site and a charged tRNA in the A site.
COMPLETE SOLUTIONS
The elongation of the leading strand during DNA synthesis? - correct answer ✔✔ Occurs 5' to 3'
Describe DNA Polymerase - correct answer ✔✔ Needs a primer to add dNTPs to the new strand
and is active on both the leading and lagging strands
Each amino acid in a protein is specified by what? - correct answer ✔✔ A codon
What does a primase do? - correct answer ✔✔ Makes an RNA strand that "primes" DNA
synthesis
If an mRNA codon reads UAC, its complementary anticodon will be what? - correct answer ✔✔
AUG
Molecules at the replication for include all of the following except? - correct answer ✔✔ G
protein coupled receptors
Identify the polypeptide that would be produces as a result of transcribing and translating the
following DNA sequence:
DNA: ...3' A C C A A G T C T 5' - correct answer ✔✔ trp-phe-arg
True or False: When lactose is not present in the environment allolactose binds to the lac
repressor and carries out transcription. - correct answer ✔✔ FALSE
DNA replication is what? - correct answer ✔✔ Semi-conservative
, If one strand of a DNA molecule has the base sequence ATTGACAT, its complementary strand
will have the sequence: - correct answer ✔✔ TAACGTA
A eukaryotic cell can copy its chromosomes rapidly because why? - correct answer ✔✔ There
are many origins of replication
Addition of a 5' cap, poly-A-tail, and intron/exon processing all happen to which of the following
molecules? - correct answer ✔✔ pre-mRNA
Where are Okazaki fragments found? - correct answer ✔✔ On the lagging strand
What happens during initiation of transcription? - correct answer ✔✔ RNA polymerase bind to
promoters on the DNA
Which of the following is NOT true of a codon? - correct answer ✔✔ It cannot code for more
than one amino acid
Which of the follow is true regarding positive bacterial gene regulation for the lac operon? -
correct answer ✔✔ The lac operon is off when high glucose levels are present
What happens during initiation of translation? - correct answer ✔✔ The ribosome binds to the
mRNA and the tRNa carrying methionine binds to the start codon
What does elongation of a polypeptide chain involve? - correct answer ✔✔ The formation of a
peptide bond between the growing polypeptide in the P site and a charged tRNA in the A site.
