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BIO 112 Exam 3 Questions with complete solutions
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BIO 112 Exam 3 Questions with complete solutions
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BIO 112 Exam 3 Questions with complete solutionsA eukaryotic cell has DNA with 26% of the bases as T. What
percentage of the bases are G? Correct Answer 24%
A human skin cell is ________, whereas a human sperm cell is
________. Correct Answer Diploid, haploid
A plant is suffering from drought and beginning to wilt. Which
cell component is affected and what type of molecule is being
lost from this structure? Correct Answer vacuole; water
A researcher hypothesized that tributyltin (an additive in boat
paint) causes reproductive defects in marine snails developing in
the water. In an experiment testing the effects of tributyltin on
developing snails, which condition should be used as a control?
Correct Answer Snails developing in a water tank are exposed
to boat paint without tributyltin
According to scientific evidence, what is the best prevention
method known for reducing the chance of contracting a common
cold? Correct Answer washing your hands frequently and
effectively
According to the theory of evolution what shared characteristics
suggest that all life forms on Earth arose from a single ancestor?
Correct Answer They use the same macromolecules
According to the theory of evolution, what shared characteristics
suggest that all life-forms on Earth arose from a single ancestor?
Correct Answer They use the same macromolecules.
,According to this graph what can be concluded about immunity
in these birds? Correct Answer Environment still plays a role in
these birds' immunity, even though heritability is high
Adrenoleukodystrophy (ALD) is a recessive X-linked disease
resulting in defective enzymes attacking myelin in the nervous
system. Which genetic predictions are possible for the offspring
of a male with ALD and a female carrier of the disease? Correct
Answer Some males and females could have ALD
An enzyme is: Correct Answer A protein that speeds up
chemical reactions in cells.
Arrange the steps of the scientific method Correct Answer 1.
Make observations regarding the natural world. 2. 2.Form a
hypothesis
3. Generate predictions.
4. Perform an experiment.
Besides polygenic inheritance what factor may also affect skin
color? Correct Answer environment
Categorize the following as unique to either the plant or animal
cell or found in both Correct Answer Found in both plant and
animal cells
1. Mitochondrion
2. Plasma membrane
3. Nucleus
4. Endoplasmic reticulum
Unique to either plant or animal cells
, 1. Cell wall
2. Centriole
3.Large central vacuole
4. Chloroplast
Consider this hypothesis: "Drinking Echinacea tea reduces the
duration and severity of colds."Which statement is the best
prediction based on this hypothesis? Correct Answer If cold
sufferers drink Echinacea tea, then they will feel better sooner
Cystic fibrosis is caused by the recessive allele f. What
percentage of possible offspring would develop cystic fibrosis
from a mating of two parents with Ff genotypes? Correct
Answer 25%
During cellular respiration what is the function of the protein
channel where H+ ions escape into the matrix of the
mitochondrion? Correct Answer to add a phosphate to ADP
During which phase of mitosis are the replicated chromosomes
aligned in the middle of the cell? Correct Answer Metaphase
Each human gamete contains Correct Answer 23 non-
homologous chromosomes
Elodea is a freshwater aquatic plant that is often used as
aquarium vegetation. How would an Elodea plant be affected by
immersion in a saltwater aquarium? Correct Answer The cells
of the plant would shrink as water from the plant moved into the
aquarium
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