BIOL 1009 MIDTERM II LATEST
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
Which of the enzymes removes the RNA nucleotides from the primer
and adds equivalent DNA nucleotides to the 3' end of Okazaki
fragments?
Select one:
a. primase
b. DNA polymerase III
c. ligase
d. DNA polymerase I - ANSWERS-d
The DNA molecule is able to carry a vast amount of hereditary
information in which of the following?
Select one:
a. phosphate-sugar backbones
b. sequence of bases
c. complementary pairing of bases
d. side groups of nitrogenous bases - ANSWERS-b
END OF
PAGE
1
, BIOL 1009 MIDTERM II LATEST
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
What is the function of topoisomerase?
Select one:
a. relieving tight twisting in the DNA ahead of the replication fork
b. adding methyl groups to bases of DNA
c. unwinding of the double helix
d. elongating new DNA at a replication fork by adding nucleotides to the
existing chain - ANSWERS-b
The ends of linear chromosomes are known as
Select one:
a. telomeres
b. DNA replication origins
c. centromeres
d. endomeres - ANSWERS-a
Complete the following sentence: A ______ is a sequence of DNA
nucleotides that occurs at a particular _______ on a chromosome.
Select one:
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PAGE
2
, BIOL 1009 MIDTERM II LATEST
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
a. gene; locus
b. centromere; homolog
c. gene; chromatid
d. gamete; centromere
e. locus; chromatid - ANSWERS-a
Which of the following statements about pre-mRNAs (primary mRNAs)
is correct?
Select one:
a. Primary mRNAs may contain both exons and introns
b. Introns are removed from primary mRNAs by splicing
c. PolyA tails are added to primary mRNAs
d. all of these answers are correct - ANSWERS-d
Which of the following statements about nucleic acids is FALSE?
Select one:
a. DNA acts as the template for formation of RNA
b. The nucleotides that form RNA molecules contain ribose
END OF
PAGE
3
, BIOL 1009 MIDTERM II LATEST
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
c. The nucleotides that form DNA molecules contain ribose
d. RNA acts as the template for formation of proteins - ANSWERS-c
A particular triplet of bases in the coding strand of a gene is AAA. If an
mRNA is made from this gene, the anticodon on the tRNA that will bind
the codon on the mRNA is
Select one:
a. UUA.
b. UUU.
c. TTT.
d. AAA. - ANSWERS-b
What is the best description of a carbonyl group?
Select one:
a. A carbon atom joined to an oxygen by a double covalent bond
b. An oxygen joined to a carbon by a single covalent bond
c. A nitrogen and two hydrogens joined to a carbon by covalent bonds
END OF
PAGE
4
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
Which of the enzymes removes the RNA nucleotides from the primer
and adds equivalent DNA nucleotides to the 3' end of Okazaki
fragments?
Select one:
a. primase
b. DNA polymerase III
c. ligase
d. DNA polymerase I - ANSWERS-d
The DNA molecule is able to carry a vast amount of hereditary
information in which of the following?
Select one:
a. phosphate-sugar backbones
b. sequence of bases
c. complementary pairing of bases
d. side groups of nitrogenous bases - ANSWERS-b
END OF
PAGE
1
, BIOL 1009 MIDTERM II LATEST
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
What is the function of topoisomerase?
Select one:
a. relieving tight twisting in the DNA ahead of the replication fork
b. adding methyl groups to bases of DNA
c. unwinding of the double helix
d. elongating new DNA at a replication fork by adding nucleotides to the
existing chain - ANSWERS-b
The ends of linear chromosomes are known as
Select one:
a. telomeres
b. DNA replication origins
c. centromeres
d. endomeres - ANSWERS-a
Complete the following sentence: A ______ is a sequence of DNA
nucleotides that occurs at a particular _______ on a chromosome.
Select one:
END OF
PAGE
2
, BIOL 1009 MIDTERM II LATEST
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
a. gene; locus
b. centromere; homolog
c. gene; chromatid
d. gamete; centromere
e. locus; chromatid - ANSWERS-a
Which of the following statements about pre-mRNAs (primary mRNAs)
is correct?
Select one:
a. Primary mRNAs may contain both exons and introns
b. Introns are removed from primary mRNAs by splicing
c. PolyA tails are added to primary mRNAs
d. all of these answers are correct - ANSWERS-d
Which of the following statements about nucleic acids is FALSE?
Select one:
a. DNA acts as the template for formation of RNA
b. The nucleotides that form RNA molecules contain ribose
END OF
PAGE
3
, BIOL 1009 MIDTERM II LATEST
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
c. The nucleotides that form DNA molecules contain ribose
d. RNA acts as the template for formation of proteins - ANSWERS-c
A particular triplet of bases in the coding strand of a gene is AAA. If an
mRNA is made from this gene, the anticodon on the tRNA that will bind
the codon on the mRNA is
Select one:
a. UUA.
b. UUU.
c. TTT.
d. AAA. - ANSWERS-b
What is the best description of a carbonyl group?
Select one:
a. A carbon atom joined to an oxygen by a double covalent bond
b. An oxygen joined to a carbon by a single covalent bond
c. A nitrogen and two hydrogens joined to a carbon by covalent bonds
END OF
PAGE
4
