BIO 152 EXAM 2 QUIZ WITH
CORRECT ANSWERS 2025
Which enzyme cannot catalyze the formation or breakdown of
phosphodiester linkages? correct answers >> Helicase
The DNA replication machinery in human can copy approximately
6.5 billion bases in a few hours. It can operate so quickly in part
because correct answers >> DNA replication is initiated
simultaneously at many points along each chromosome
What enzyme relieves the tension in the unwinding DNA double
helix correct answers >> topoisomerases
What enzyme joins Okazaki fragments? correct answers >>
DNA ligase
What enzyme synthesizes short segments of RNA? correct
answers >> primase
Scientists have discovered how to put together a bacteriophage
so that it has the coat proteins of a T2 phage and the DNA of a T4
phage. If this artificially produced phage infects a bacterium, it
will take over the bacterium's cell machinery and make more
phages. If this occurs, the new phages produced in host bacterial
cell would have correct answers >> the protein and DNA of
T4
, Why does DNA replication require the enzyme primase?
correct answers >> Primase builds an RNA primer so that DNA
polymerase has a free 3' end to attach nucleotides to
RNA polymerase synthesizes chains of polynucleotides by adding
new subunits to the .... end of the growing chain correct
answers >> 3'
A section of a DNA strand is the following: 3' C-A-T-T-A-G-C-A-T-A-
C 5'. What is the sequence of a new strand of mRNA made from
this template DNA? correct answers >> 5' G-U-A-A-U-C-G-U-
A-U-G 3'
RNA polymerase synthesizes chains of polynucleotides by:
correct answers >> adding new subunits to the 3' end of the
growing chain of nucleic acid
When a single base is deleted from an exon of a gene encoding a
protein, this most often leads to a ..... mutation correct
answers >> frameshift
A transfer RNA (tRNA) correct answers >> contains the
anticodon for a specific amino acid
Unlike prokaryotic mRNAs, eukaryotic primary transcript RNAs
cannot be translated while they are still being transcribed. This is
so because: correct answers >> many have not yet had their
non-coding introns removed and unlike prokaryotic RNA, they lack
a poly-A tail
CORRECT ANSWERS 2025
Which enzyme cannot catalyze the formation or breakdown of
phosphodiester linkages? correct answers >> Helicase
The DNA replication machinery in human can copy approximately
6.5 billion bases in a few hours. It can operate so quickly in part
because correct answers >> DNA replication is initiated
simultaneously at many points along each chromosome
What enzyme relieves the tension in the unwinding DNA double
helix correct answers >> topoisomerases
What enzyme joins Okazaki fragments? correct answers >>
DNA ligase
What enzyme synthesizes short segments of RNA? correct
answers >> primase
Scientists have discovered how to put together a bacteriophage
so that it has the coat proteins of a T2 phage and the DNA of a T4
phage. If this artificially produced phage infects a bacterium, it
will take over the bacterium's cell machinery and make more
phages. If this occurs, the new phages produced in host bacterial
cell would have correct answers >> the protein and DNA of
T4
, Why does DNA replication require the enzyme primase?
correct answers >> Primase builds an RNA primer so that DNA
polymerase has a free 3' end to attach nucleotides to
RNA polymerase synthesizes chains of polynucleotides by adding
new subunits to the .... end of the growing chain correct
answers >> 3'
A section of a DNA strand is the following: 3' C-A-T-T-A-G-C-A-T-A-
C 5'. What is the sequence of a new strand of mRNA made from
this template DNA? correct answers >> 5' G-U-A-A-U-C-G-U-
A-U-G 3'
RNA polymerase synthesizes chains of polynucleotides by:
correct answers >> adding new subunits to the 3' end of the
growing chain of nucleic acid
When a single base is deleted from an exon of a gene encoding a
protein, this most often leads to a ..... mutation correct
answers >> frameshift
A transfer RNA (tRNA) correct answers >> contains the
anticodon for a specific amino acid
Unlike prokaryotic mRNAs, eukaryotic primary transcript RNAs
cannot be translated while they are still being transcribed. This is
so because: correct answers >> many have not yet had their
non-coding introns removed and unlike prokaryotic RNA, they lack
a poly-A tail
