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Practice Exam Answers

29 verified answers
1
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Which is a function of the cell structure that is labeled X?

A
It stores lipids.
B
It helps in cell metabolism.
C
It transports proteins.
D
It provides support.
2
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In which location is glucose formed?

A
Location B
B
Location A
C
Location D
D
Location C
3

What is shown in the image?

A
chloroplast
B
prokaryote
C
eukaryote
D
mitochondrion
4

What type of lipid is shown?

A
unsaturated
B
triglyceride
C
saturated
D
phospholipid
5

Which characteristic would be correctly found in B?

A
have an R group
B
made of nucleotides
C
consist of two strands
D
contain ribose
6

Medical biologists are researching a fertility disorder that prevents developing offspring from forming the structures they need to maintain nourishment and continue development. Therefore, development ceases early during gestation. What is the final stage of development that these offspring could reach before development stops?

A
gametes
B
zygote
C
fetus
D
blastocyst
7

Which statement best distinguishes the light-dependent (L-D) reactions from the light-independent (L-IND) reactions?

A
The L-D reactions occur in the cytoplasm, and the L-IND reactions occur in the chloroplast.
B
The L-D reactions occur in the chloroplast, and the L-IND reactions occur in the mitochondria.
C
The L-D reactions occur in the stroma, and the L-IND reactions occur in the cytoplasm.
D
The L-D reactions occur in the thylakoid membrane, and the L-IND reactions occur in the stroma.
8

Which statement best describes the process of chemiosmosis and the direct result of its occurrence?

A
Hydrogen ions flow from the thylakoid against a concentration gradient through ATP synthase channels into the stroma. ADP is converted to ATP.
B
Hydrogen ions flow from the stroma down a concentration gradient through ATP synthase channels into the thylakoid. ADP is converted to ATP.
C
Hydrogen ions flow from the thylakoid down a concentration gradient through ATP synthase channels into the stroma. ADP is converted to ATP.
D
Hydrogen ions flow from the thylakoid down a concentration gradient through ATP synthase channels into the stroma. ATP is converted to ADP.
9

A dietician examines the diet of a patient who is complaining that he is unable to build muscle mass. The patient eats mainly fresh fruits, vegetables, pasta, bread, and some fats and oils. Which type of supplement will the dietician most likely recommend?

A
fatty acids
B
amino acids
C
citric acid
D
nucleic acids
10

A new multicellular organism has been discovered, and scientists want to study the organism’s cell structures, including organelles. Which microscope should they use?

A
simple microscope
B
transmission electron microscope
C
compound light microscope
D
scanning electron microscope
11

Which statement best describes the overall change that occurs as a result of mitosis?

A
One cell becomes two cells that have different copies of DNA.
B
Two cells become two cells that have identical copies of DNA.
C
Two cells become two cells that have different copies of DNA.
D
One cell becomes two cells that have identical copies of DNA.
12

The concentration of sodium on the inside of the cell is 20 mM. The outside of the cell has a sodium concentration of 115 mM. Which mechanism of ion uptake would best move sodium from the inside of the cell to the outside?

A
osmosis
B
active transport
C
diffusion
D
passive transport
13

Which statement correctly explains whether more ATP is found in muscle cells or bone cells?

A
More ATP is found in muscle cells because they use energy less efficiently than bone cells.
B
More ATP is found in muscle cells because they need large amounts of energy to power motion.
C
More ATP is found in bone cells because they need large amounts of energy to produce marrow.
D
More ATP is found in bone cells because they grow more and need energy from ATP.
14

Which statement correctly describes what proteins, lipids, and glycogen have in common?

A
They each can be broken down to provide ATP to cells.
B
They are all used as primary energy sources during exercise.
C
They are each stored in the liver to be used as a ready energy reserve.
D
They each contain the same amount of ATP.
15

Which organ systems work together to help the body shiver in order to maintain homeostasis?

A
respiratory and nervous
B
circulatory and muscular
C
nervous and muscular
D
circulatory and respiratory
16

Which action is a physical change in digestion?

A
producing enzymes for nutrient absorption
B
absorbing nutrients from food
C
salivating to break food into carbohydrates
D
mashing food with teeth
17

Influenza (the flu) is caused by a virus that attacks the respiratory system. Which type of gene is most likely to be widely expressed in the body of someone who contracts the influenza virus?

A
the gene that controls the production of white blood cells
B
the gene that controls the production of red blood cells
C
the gene that controls the production of stem cells
D
the gene that controls the production of skin cells
18

How does a catalyst influence a chemical reaction?

A
It speeds up or slows down a chemical reaction by direct participation.
B
It reacts with products to increase the concentration of reactants.
C
It decreases the amount of energy necessary for the reaction to proceed.
D
It increases the total amount of products formed.
19

How is a brain injury classified?

A
as an injury of the central nervous system
B
as an injury of the autonomic nervous system
C
as an injury of the peripheral nervous system
D
as an injury of the somatic nervous system
20

Which best illustrates the result of the process of meiosis?

A
A daughter looks different from both her mother and her father.
B
A cheetah cub has very similar fur to its mother.
C
A Labrador puppy looks exactly like its father.
D
A pea plant has the same flower color as its parent plants.

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