BIO 1108 Exam 1 Questions Solved Correctly Latest Update 2025 Graded A+
population - Answers any group of organisms coexisting at the same time and place that are capable of
interbreeding with one another
gene pool - Answers all of the alleles at all loci in the population
allele fixation - Answers when a gene has only one allele. when one allele of a gene becomes the only
allele, while the alternatives are eliminated from the population.
Why does meiosis result in more genetic variation than can be explained by mutation alone?
A. meiosis II
B. The egg and sperm have more chromosomes.
C. crossing over
D. Not all the DNA gets replicated.
E. The mutation rate is always higher than expected. - Answers C. crossing over
At the end of mitosis, daughter cells are ___, whereas at the end of meiosis, daughter cells are ___.
A. haploid; diploid
B. diploid; haploid
C. diploid; polyploid
D. polyploid; haploid
E. haploid; haploid - Answers B. diploid; haploid
A zygote is:
A. diploid.
B. haploid.
C. polyploid.
D. All of the above.
E. None of the above. - Answers A. diploid
A parent cell divides to form two genetically identical daughter cells in the process of mitosis. For mitosis
to take place _____.
A. the parent cell must first dissolve its nuclear membrane
,B. the parent cell must first replicate its entire genome
C. the parent cell must first achieve a specified size
D. the parent cell must divide its DNA in half so that each daughter cell gets only the genes it needs -
Answers C. the parent cell must first achieve a specified size
Which one of the following statements best represents the relationship between cellular respiration and
photosynthesis?
A. Photosynthesis stores energy in organic molecules, while respiration releases it.
B. Photosynthesis occurs only during the day and respiration occurs only at night.
C. Respiration occurs only in animals and photosynthesis occurs only in plants.
D. Respiration stores energy in organic molecules, while photosynthesis releases it.
E. Photosynthesis reverses the biochemical pathways of respiration. - Answers A. Photosynthesis stores
energy in organic molecules, while respiration releases it
When photosynthesis is fully operational under conditions of intense light, the pH of the thylakoid
lumen may be as much as three full pH units lower than the stroma of the chloroplast. That means that
there are ____________ hydrogen ions in the thylakoid compared to the stroma.
A. 1,000 times more
B. 100 times more
C. 3 times more
D. 3 times fewer - Answers A. 1,000 times more
Photosynthesis is the pathway used to synthesize carbohydrates from:
A. sunlight.
B. carbon dioxide.
C. oxygen.
D. sunlight, water and carbon dioxide.
E. sunlight, carbon dioxide, and oxygen. - Answers D. sunlight, water and carbon dioxide
Arrange the steps in the Calvin cycle in order from earliest to latest.
A. carboxylation, reduction, regeneration
, B. reduction, regeneration, carboxylation
C. regeneration, carboxylation, reduction
D. carboxylation, regeneration, reduction
E. reduction, carboxylation, regeneration - Answers A. carboxylation, reduction, regeneration
Leaves absorb the least amount of light in the range of the visible spectrum.
A. orange
B. green
C. blue
D. yellow
E. violet - Answers B. green
Photorespiration results in:
A. the consumption of ATP.
B. the loss of CO2.
C. the inactivation of rubisco.
D. the consumption of ATP and the loss of CO2
E. All of these choices are correct. - Answers D. the consumption of ATP and the loss of CO2
The pH in the stroma of the chloroplast should be ______ compared to the thylakoids due to the
_______.
A. higher; higher concentration of hydrogen ions in the thylakoid
B. lower; higher concentration of hydrogen ions in the thylakoid
C. higher; lower concentration of hydrogen ions in the thylakoid
D. lower; lower concentration of hydrogen ions in the thylakoid - Answers A. higher; higher
concentration of hydrogen ions in the thylakoid
The hydrogen ion gradient across the thylakoid membrane is required to _________.
A. power ATP synthase
B. provide a source of hydrogen ions needed for carbohydrate in the Calvin cycle
population - Answers any group of organisms coexisting at the same time and place that are capable of
interbreeding with one another
gene pool - Answers all of the alleles at all loci in the population
allele fixation - Answers when a gene has only one allele. when one allele of a gene becomes the only
allele, while the alternatives are eliminated from the population.
Why does meiosis result in more genetic variation than can be explained by mutation alone?
A. meiosis II
B. The egg and sperm have more chromosomes.
C. crossing over
D. Not all the DNA gets replicated.
E. The mutation rate is always higher than expected. - Answers C. crossing over
At the end of mitosis, daughter cells are ___, whereas at the end of meiosis, daughter cells are ___.
A. haploid; diploid
B. diploid; haploid
C. diploid; polyploid
D. polyploid; haploid
E. haploid; haploid - Answers B. diploid; haploid
A zygote is:
A. diploid.
B. haploid.
C. polyploid.
D. All of the above.
E. None of the above. - Answers A. diploid
A parent cell divides to form two genetically identical daughter cells in the process of mitosis. For mitosis
to take place _____.
A. the parent cell must first dissolve its nuclear membrane
,B. the parent cell must first replicate its entire genome
C. the parent cell must first achieve a specified size
D. the parent cell must divide its DNA in half so that each daughter cell gets only the genes it needs -
Answers C. the parent cell must first achieve a specified size
Which one of the following statements best represents the relationship between cellular respiration and
photosynthesis?
A. Photosynthesis stores energy in organic molecules, while respiration releases it.
B. Photosynthesis occurs only during the day and respiration occurs only at night.
C. Respiration occurs only in animals and photosynthesis occurs only in plants.
D. Respiration stores energy in organic molecules, while photosynthesis releases it.
E. Photosynthesis reverses the biochemical pathways of respiration. - Answers A. Photosynthesis stores
energy in organic molecules, while respiration releases it
When photosynthesis is fully operational under conditions of intense light, the pH of the thylakoid
lumen may be as much as three full pH units lower than the stroma of the chloroplast. That means that
there are ____________ hydrogen ions in the thylakoid compared to the stroma.
A. 1,000 times more
B. 100 times more
C. 3 times more
D. 3 times fewer - Answers A. 1,000 times more
Photosynthesis is the pathway used to synthesize carbohydrates from:
A. sunlight.
B. carbon dioxide.
C. oxygen.
D. sunlight, water and carbon dioxide.
E. sunlight, carbon dioxide, and oxygen. - Answers D. sunlight, water and carbon dioxide
Arrange the steps in the Calvin cycle in order from earliest to latest.
A. carboxylation, reduction, regeneration
, B. reduction, regeneration, carboxylation
C. regeneration, carboxylation, reduction
D. carboxylation, regeneration, reduction
E. reduction, carboxylation, regeneration - Answers A. carboxylation, reduction, regeneration
Leaves absorb the least amount of light in the range of the visible spectrum.
A. orange
B. green
C. blue
D. yellow
E. violet - Answers B. green
Photorespiration results in:
A. the consumption of ATP.
B. the loss of CO2.
C. the inactivation of rubisco.
D. the consumption of ATP and the loss of CO2
E. All of these choices are correct. - Answers D. the consumption of ATP and the loss of CO2
The pH in the stroma of the chloroplast should be ______ compared to the thylakoids due to the
_______.
A. higher; higher concentration of hydrogen ions in the thylakoid
B. lower; higher concentration of hydrogen ions in the thylakoid
C. higher; lower concentration of hydrogen ions in the thylakoid
D. lower; lower concentration of hydrogen ions in the thylakoid - Answers A. higher; higher
concentration of hydrogen ions in the thylakoid
The hydrogen ion gradient across the thylakoid membrane is required to _________.
A. power ATP synthase
B. provide a source of hydrogen ions needed for carbohydrate in the Calvin cycle
