1|Page
BIOLOGY EXAM PRACTICE QUESTIONS (FROM REVIEW
SESSION) QUESTIONS AND CORRECT ANSWERS
The solution in the two arms of this U tube is separated by a membrane that is permeable to
water and glucose but not to sucrose. Side A is half-filled with a solution of 2 M sucrose and 1 M
glucose. Side B is half-filled with 1 M sucrose and 2 M glucose. Initially, the liquid levels on
both sides are equal. Initially, in terms of tonicity, the solution in side A with respect to that in
side B is
Saturated
Hypertonic
Hypotonic
Plasmolyzed
Isotonic
Isotonic
Cytosine makes us 42% of the nucleotides in a sample of DNA from an organism.
Approximately what percentage of the nucleotides in this sample will be thymine?
16%
42%
31%
8%
8%
A man who is an achondroplastic dwarf with normal vision marries a color-blind woman of
normal height. The man's father was 6 feet tall, and both the woman's parents were of average
height. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X-
linked recessive. How many of their daughters might be expected to be color-blind dwarfs?
all
one out of four
half
none
three out of four
none
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Why did all of the F1 offspring of Mendel's classic pea cross always look like one of the two
parental varieties?
No genes interacted to produce a new unique phenotype
Each allele affected phenotypic expression
The traits blended together during fertilization
One allele was recessive
One allele was recessive
The oxygen released by photosynthesis is produced by which of the following processes?
splitting water molecules
chemiosmosis
the electron transfer system of photosystem I
the electron transfer system of photosystem II
splitting water molecules
Which answer correctly compares prokaryotic and eukaryotic codons?
Prokaryotic codons usually contain different bases than those of eukaryotes.
Prokaryotic codons usually specify different amino acids than those of eukaryotes.
Organism within a phylum share codons that are distinct from organisms in other phyla.
Organisms utilize codons that are nearly universal among all organisms.
Organisms utilize codons that are nearly universal among all organisms.
In which of the following stages is a human cell haploid?
Beginning of Meiosis II
Beginning of Meiosis I
G2
G1
Beginning of Meiosis II
Which of the following processes occurs as part of transcription?
DNA is replicated
RNA is synthesized
proteins are synthesized
mRNA attaches to ribosomes
RNA is synthesized
BIOLOGY EXAM PRACTICE QUESTIONS (FROM REVIEW
SESSION) QUESTIONS AND CORRECT ANSWERS
The solution in the two arms of this U tube is separated by a membrane that is permeable to
water and glucose but not to sucrose. Side A is half-filled with a solution of 2 M sucrose and 1 M
glucose. Side B is half-filled with 1 M sucrose and 2 M glucose. Initially, the liquid levels on
both sides are equal. Initially, in terms of tonicity, the solution in side A with respect to that in
side B is
Saturated
Hypertonic
Hypotonic
Plasmolyzed
Isotonic
Isotonic
Cytosine makes us 42% of the nucleotides in a sample of DNA from an organism.
Approximately what percentage of the nucleotides in this sample will be thymine?
16%
42%
31%
8%
8%
A man who is an achondroplastic dwarf with normal vision marries a color-blind woman of
normal height. The man's father was 6 feet tall, and both the woman's parents were of average
height. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X-
linked recessive. How many of their daughters might be expected to be color-blind dwarfs?
all
one out of four
half
none
three out of four
none
, 2|Page
Why did all of the F1 offspring of Mendel's classic pea cross always look like one of the two
parental varieties?
No genes interacted to produce a new unique phenotype
Each allele affected phenotypic expression
The traits blended together during fertilization
One allele was recessive
One allele was recessive
The oxygen released by photosynthesis is produced by which of the following processes?
splitting water molecules
chemiosmosis
the electron transfer system of photosystem I
the electron transfer system of photosystem II
splitting water molecules
Which answer correctly compares prokaryotic and eukaryotic codons?
Prokaryotic codons usually contain different bases than those of eukaryotes.
Prokaryotic codons usually specify different amino acids than those of eukaryotes.
Organism within a phylum share codons that are distinct from organisms in other phyla.
Organisms utilize codons that are nearly universal among all organisms.
Organisms utilize codons that are nearly universal among all organisms.
In which of the following stages is a human cell haploid?
Beginning of Meiosis II
Beginning of Meiosis I
G2
G1
Beginning of Meiosis II
Which of the following processes occurs as part of transcription?
DNA is replicated
RNA is synthesized
proteins are synthesized
mRNA attaches to ribosomes
RNA is synthesized
