Bio 181 Grand Canyon University Exam
3 2025/2026 Exam Questions with 100%
Correct Answers | Latest Update
A frameshift mutation could result from - 🧠 ANSWER ✔✔E) either an
insertion or a deletion of a base.
Which of the following does not occur in prokaryotic eukaryotic gene
expression, but does in eukaryotic gene expression? - 🧠 ANSWER ✔✔C) A
poly-A tail is added to the 3' end of an mRNA and a cap is added to the 5'
end.
Which of the following helps to hold the DNA strands apart while they are
being replicated? - 🧠 ANSWER ✔✔single-strand binding proteins
, Accuracy in the translation of mRNA into the primary structure of a
polypeptide depends on specificity in the - 🧠 ANSWER ✔✔bonding of the
anticodon to the codon and the attachment of amino acids to tRNAs
Cytosine makes up 42% of the nucleotides in a sample of DNA from an
organism. Approximately what percentage of the nucleotides in this sample
will be thymine? - 🧠 ANSWER ✔✔8%
What is the function of DNA polymerase III? - 🧠 ANSWER ✔✔to add
nucleotides to the 3' end of a growing DNA strand
A new DNA strand elongates only in the 5' to 3' direction because - 🧠
ANSWER ✔✔DNA polymerase can only add nucleotides to the free 3' end.
How do we describe transformation in bacteria? - 🧠 ANSWER
✔✔assimilation of external DNA into a cell
What is the function of topoisomerase? - 🧠 ANSWER ✔✔relieving strain in
the DNA ahead of the replication fork
Which enzyme catalyzes the elongation of a DNA strand in the 5' → 3'
direction? - 🧠 ANSWER ✔✔DNA polymerase III
3 2025/2026 Exam Questions with 100%
Correct Answers | Latest Update
A frameshift mutation could result from - 🧠 ANSWER ✔✔E) either an
insertion or a deletion of a base.
Which of the following does not occur in prokaryotic eukaryotic gene
expression, but does in eukaryotic gene expression? - 🧠 ANSWER ✔✔C) A
poly-A tail is added to the 3' end of an mRNA and a cap is added to the 5'
end.
Which of the following helps to hold the DNA strands apart while they are
being replicated? - 🧠 ANSWER ✔✔single-strand binding proteins
, Accuracy in the translation of mRNA into the primary structure of a
polypeptide depends on specificity in the - 🧠 ANSWER ✔✔bonding of the
anticodon to the codon and the attachment of amino acids to tRNAs
Cytosine makes up 42% of the nucleotides in a sample of DNA from an
organism. Approximately what percentage of the nucleotides in this sample
will be thymine? - 🧠 ANSWER ✔✔8%
What is the function of DNA polymerase III? - 🧠 ANSWER ✔✔to add
nucleotides to the 3' end of a growing DNA strand
A new DNA strand elongates only in the 5' to 3' direction because - 🧠
ANSWER ✔✔DNA polymerase can only add nucleotides to the free 3' end.
How do we describe transformation in bacteria? - 🧠 ANSWER
✔✔assimilation of external DNA into a cell
What is the function of topoisomerase? - 🧠 ANSWER ✔✔relieving strain in
the DNA ahead of the replication fork
Which enzyme catalyzes the elongation of a DNA strand in the 5' → 3'
direction? - 🧠 ANSWER ✔✔DNA polymerase III
