Biology 5236 EXAM (New 2026/ 2027
Update) Questions & Answers {Grade A}
100% Correct (Verified Solutions)
Trisomy is a type of genetic disorder that is characterized by which of the following?
Answer the question by selecting the correct response.
A. The deletion of a single base pair
B. The duplication of a single gene
C. The presence of an additional chromosome
D. The presence of an additional nucleus - Correct answer C. The presence of an
additional chromosome
Trisomy refers to the presence of an extra copy of a chromosome or most of a
chromosome. It most frequently occurs when homologous chromosomes or sister
chromatids fail to separate during meiosis, so that a gamete is formed with two copies,
rather than one, of a particular chromosome. Fertilization of the gamete with a gamete
containing the normal number of chromosomes results in a zygote with three, rather
than two, copies of the particular chromosome and thus an extra set of the genes on
that chromosome.
,Which TWO of the following are typical characteristics of monocots but not of eudicots?
Answer the question by selecting the correct responses.
A. Adventitious roots
B. Leaves with parallel venation
C. Flower parts in multiples of four or five
D. Vascular bundles in the stem arranged in a ring - Correct answer A. Adventitious
roots
B. Leaves with parallel venation
Monocots have an adventitious root system of similarly sized roots that spread out
from the stem, whereas eudicots typically have a main taproot from which other roots
grow. Monocots have leaves with parallel veins, whereas the veins of eudicots
typically occur in a netlike pattern.
Which of the following is most appropriate for separating pigments extracted from
plant leaves?
Answer the question by selecting the correct response.
,A. Chromatography
B. Dissection
C. Distillation
D. Spectrophotometry - Correct answer A. Chromatography
Pigments extracted from plant leaves are typically separated from each other by
chromatography. A drop of liquid from an extract of ground leaves is placed on a strip
of chromatography paper close to the bottom. The very bottom of the paper, below the
extract drop, is then placed in an organic solvent. As the solvent travels up the strip,
the pigments in the extract separate based on their solubility in the solvent and their
attraction to the hydrated cellulose in the chromatography paper.
Which of the following structures is typically found in eukaryotic cells but not in
prokaryotic cells?
Answer the question by selecting the correct response.
A. Ribosome
B. Chromosome
C. Mitochondrion
, D. Plasma membrane - Correct answer C. Mitochondrion
Skin color in humans appears to show a continuous distribution. In an examination of
pedigrees, no recognizable pattern of Mendelian inheritance is found with respect to
skin color. The data suggest that inheritance of skin color in humans is
Answer the question by selecting the correct response.
A. codominant
B. epistatic
C. incompletely dominant
D. polygenic - Correct answer D. polygenic
Many different genes contribute to skin color, and the combined activity of the genes
determines how light or dark a person's skin is.
In eukaryotes, which of the following reactions are most directly responsible for
establishing the proton concentration gradient that is required for ATP synthesis by
oxidative phosphorylation during aerobic cellular respiration?
Answer the question by selecting the correct response.
Update) Questions & Answers {Grade A}
100% Correct (Verified Solutions)
Trisomy is a type of genetic disorder that is characterized by which of the following?
Answer the question by selecting the correct response.
A. The deletion of a single base pair
B. The duplication of a single gene
C. The presence of an additional chromosome
D. The presence of an additional nucleus - Correct answer C. The presence of an
additional chromosome
Trisomy refers to the presence of an extra copy of a chromosome or most of a
chromosome. It most frequently occurs when homologous chromosomes or sister
chromatids fail to separate during meiosis, so that a gamete is formed with two copies,
rather than one, of a particular chromosome. Fertilization of the gamete with a gamete
containing the normal number of chromosomes results in a zygote with three, rather
than two, copies of the particular chromosome and thus an extra set of the genes on
that chromosome.
,Which TWO of the following are typical characteristics of monocots but not of eudicots?
Answer the question by selecting the correct responses.
A. Adventitious roots
B. Leaves with parallel venation
C. Flower parts in multiples of four or five
D. Vascular bundles in the stem arranged in a ring - Correct answer A. Adventitious
roots
B. Leaves with parallel venation
Monocots have an adventitious root system of similarly sized roots that spread out
from the stem, whereas eudicots typically have a main taproot from which other roots
grow. Monocots have leaves with parallel veins, whereas the veins of eudicots
typically occur in a netlike pattern.
Which of the following is most appropriate for separating pigments extracted from
plant leaves?
Answer the question by selecting the correct response.
,A. Chromatography
B. Dissection
C. Distillation
D. Spectrophotometry - Correct answer A. Chromatography
Pigments extracted from plant leaves are typically separated from each other by
chromatography. A drop of liquid from an extract of ground leaves is placed on a strip
of chromatography paper close to the bottom. The very bottom of the paper, below the
extract drop, is then placed in an organic solvent. As the solvent travels up the strip,
the pigments in the extract separate based on their solubility in the solvent and their
attraction to the hydrated cellulose in the chromatography paper.
Which of the following structures is typically found in eukaryotic cells but not in
prokaryotic cells?
Answer the question by selecting the correct response.
A. Ribosome
B. Chromosome
C. Mitochondrion
, D. Plasma membrane - Correct answer C. Mitochondrion
Skin color in humans appears to show a continuous distribution. In an examination of
pedigrees, no recognizable pattern of Mendelian inheritance is found with respect to
skin color. The data suggest that inheritance of skin color in humans is
Answer the question by selecting the correct response.
A. codominant
B. epistatic
C. incompletely dominant
D. polygenic - Correct answer D. polygenic
Many different genes contribute to skin color, and the combined activity of the genes
determines how light or dark a person's skin is.
In eukaryotes, which of the following reactions are most directly responsible for
establishing the proton concentration gradient that is required for ATP synthesis by
oxidative phosphorylation during aerobic cellular respiration?
Answer the question by selecting the correct response.
