BSC 1005 Midterm Review 1-8 questions with verified
answers
1. Biology is ________.
a. mostly a collection of facts that can be ordered and memorized
b. the study of living things
c. a separate branch of science from the study of how organisms
interact with each other and with their
environment
d. always used responsibly in advertising claims
e. Both a) and b) are true Ans✓✓✓ b. the study of living things
10. A scientific theory is one that:
a. sounds the most plausible.
b. is supported by many years of experimentation all supporting the
hypothesis.
c. changes each time a different observation is made.
d. is the result of all scientific experiments.
e. is based on hunches with no actual supporting evidence. Ans✓✓✓ d.
is the result of all scientific experiments.
100. The complementary base pairs in a DNA molecule are stabilized
by:
a. the electrostatic interactions of the charged backbone.
,b. a covalent bond.
c. a salt bridge.
d. hydrogen bonds.
e. Both a) and b) are correct Ans✓✓✓ d. hydrogen bonds.
101. The Russian-American biochemist Phoebus Levene was the first to
determine that nucleotides may contain one of
four different nitrogen-containing bases. Levene believed that the
nitrogen-containing bases occurred in equal amounts
in DNA. What is the actual proportion of these bases?
a. DNA contains equal amounts of guanine and thymine, and equal
amounts of adenine and cytosine.
b. DNA contains equal amounts of adenine and thymine, and equal
amounts of guanine and cytosine.
c. DNA contains equal amounts of adenine and guanine, and equal
amounts of thymine and cytosine.
d. DNA contains twice as much adenine and thymine as guanine and
cytosine.
e. All four do actually occur in equal amounts. Levene was right
Ans✓✓✓ b. DNA contains equal amounts of adenine and thymine, and
equal amounts of guanine and cytosine.
102. The double helix model of DNA suggested by Watson and Crick
was exciting to the scientific community because:
,a. it proved once and for all that DNA was the messenger of heritable
traits.
b. it explained how genetic material could be duplicated by means of
the complementary strands.
c. it broke the code, providing the correct amino acid for each triplet of
bases.
d. it opened the door to new PCR-based technologies.
e. All of the above are correct. Ans✓✓✓ b. it explained how genetic
material could be duplicated by means of the complementary strands.
103. Most genes come in alternative forms called:
a. alleles.
b. chromosomes.
c. recessives.
d. gametes.
e. dominants. Ans✓✓✓ a. alleles.
104. Alternate versions of a gene can code for different
________________ of the same character.
a. chromosomes
b. gametes
c. traits
d. bases
, e. alleles Ans✓✓✓ e. alleles
105. DNA is a macromolecule that stores information. Which
component of DNA is the source of this information?
a. the ladder
b. the sugar
c. the base
d. the phosphate group
e. the histone Ans✓✓✓ c. the base
106. A young scientist has discovered a new species of grub worm in
the Amazon. He would like to explore the
possibility that in this grub worm the codon CUC is the start codon and
that it codes for methionine rather than leucine
as it does in other worms. He has been unable to get his research
funded to date most likely because:
a. worms have been extensively studied and their genomes are simple.
b. the genetic code is universal to all species.
c. codons are generally the same in all worms.
d. worms are difficult to maintain in the laboratory.
e. worms do not contain homologous genes to humans. Ans✓✓✓ b.
the genetic code is universal to all species.
answers
1. Biology is ________.
a. mostly a collection of facts that can be ordered and memorized
b. the study of living things
c. a separate branch of science from the study of how organisms
interact with each other and with their
environment
d. always used responsibly in advertising claims
e. Both a) and b) are true Ans✓✓✓ b. the study of living things
10. A scientific theory is one that:
a. sounds the most plausible.
b. is supported by many years of experimentation all supporting the
hypothesis.
c. changes each time a different observation is made.
d. is the result of all scientific experiments.
e. is based on hunches with no actual supporting evidence. Ans✓✓✓ d.
is the result of all scientific experiments.
100. The complementary base pairs in a DNA molecule are stabilized
by:
a. the electrostatic interactions of the charged backbone.
,b. a covalent bond.
c. a salt bridge.
d. hydrogen bonds.
e. Both a) and b) are correct Ans✓✓✓ d. hydrogen bonds.
101. The Russian-American biochemist Phoebus Levene was the first to
determine that nucleotides may contain one of
four different nitrogen-containing bases. Levene believed that the
nitrogen-containing bases occurred in equal amounts
in DNA. What is the actual proportion of these bases?
a. DNA contains equal amounts of guanine and thymine, and equal
amounts of adenine and cytosine.
b. DNA contains equal amounts of adenine and thymine, and equal
amounts of guanine and cytosine.
c. DNA contains equal amounts of adenine and guanine, and equal
amounts of thymine and cytosine.
d. DNA contains twice as much adenine and thymine as guanine and
cytosine.
e. All four do actually occur in equal amounts. Levene was right
Ans✓✓✓ b. DNA contains equal amounts of adenine and thymine, and
equal amounts of guanine and cytosine.
102. The double helix model of DNA suggested by Watson and Crick
was exciting to the scientific community because:
,a. it proved once and for all that DNA was the messenger of heritable
traits.
b. it explained how genetic material could be duplicated by means of
the complementary strands.
c. it broke the code, providing the correct amino acid for each triplet of
bases.
d. it opened the door to new PCR-based technologies.
e. All of the above are correct. Ans✓✓✓ b. it explained how genetic
material could be duplicated by means of the complementary strands.
103. Most genes come in alternative forms called:
a. alleles.
b. chromosomes.
c. recessives.
d. gametes.
e. dominants. Ans✓✓✓ a. alleles.
104. Alternate versions of a gene can code for different
________________ of the same character.
a. chromosomes
b. gametes
c. traits
d. bases
, e. alleles Ans✓✓✓ e. alleles
105. DNA is a macromolecule that stores information. Which
component of DNA is the source of this information?
a. the ladder
b. the sugar
c. the base
d. the phosphate group
e. the histone Ans✓✓✓ c. the base
106. A young scientist has discovered a new species of grub worm in
the Amazon. He would like to explore the
possibility that in this grub worm the codon CUC is the start codon and
that it codes for methionine rather than leucine
as it does in other worms. He has been unable to get his research
funded to date most likely because:
a. worms have been extensively studied and their genomes are simple.
b. the genetic code is universal to all species.
c. codons are generally the same in all worms.
d. worms are difficult to maintain in the laboratory.
e. worms do not contain homologous genes to humans. Ans✓✓✓ b.
the genetic code is universal to all species.
