AnswersFirst Semester BiologyCellular Respiration

Cellular Respiration — Unit test Answers

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Which statement correctly compares and contrasts the three stages of cellular respiration that occur in the presence of oxygen?

A
Each stage occurs in the mitochondria, but only the final stage produces ATP.
B
Each stage produces ATP, but only the third stage occurs in the mitochondria.
C
Each stage produces ATP, but only the first stage occurs in the cytoplasm.
D
Each stage occurs in the cytoplasm, but only the final stage produces ATP.
2
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Which events take place in the light-dependent reactions of photosynthesis?

A
Light energy is converted to sugars; sugars are broken down for energy.
B
Light energy is captured by plants; light energy is used to make sugar.
C
Light energy is converted to chemical energy; chemical energy is used to make sugar.
D
Light energy is captured by plants; light energy is converted to chemical energy.
3

Which statement best distinguishes an observation from an inference?

A
An inference is likely to change based on additional observations.
B
An observation is likely to change based on additional inferences.
C
An observation involves assumptions, but an inference does not.
D
An inference involves the senses, but an observation does not.
4

At which point is G3P removed from the Calvin cycle to be used in the production of carbohydrates?

A
during photophosphorylation
B
during carbon fixation
C
immediately after reduction
D
immediately after regeneration
5

Which organelle makes the proteins that are needed by the cell?

A
cell membrane
B
Golgi apparatus
C
ribosomes
D
nucleus
6

During which step of cellular respiration is the most ATP produced?

A
Krebs cycle
B
glycolysis
C
photosynthesis
D
electron transport chain
7

Which organelle breaks down sugar molecules that supply energy to the cell?

A
Golgi apparatus
B
nucleus
C
endoplasmic reticulum
D
mitochondrion
8

Which speeds up the reaction between carbon dioxide and RuBP to restart the Calvin Cycle?

A
light energy
B
rubisco
C
3-phosphoglycerate
D
glyceraldehyde 3-phosphate
9

Which specific process in the light-dependent reactions produces oxygen and hydrogen ions?

A
the formation of NADPH
B
the production of ATP
C
the splitting of water
D
the excitation of electrons in photosytem I
10

During photosynthesis, the energy from sunlight is used to split water molecules. What happens to the hydrogen ions that are split from the water molecules?

A
They flow out of the thylakoid, providing energy to add a phosphate group to ADP.
B
They build up in the thylakoid, providing energy to break apart ATP molecules.
C
They build up in the thylakoid, where they bond to each other to create ATP.
D
They flow out of the thylakoid, where they stimulate enzymes to break apart ATP.
11

The table lists some organelles and functions. Only one pair is correctly matched.Functions of OrganellesOrganelleFunctionChloroplastStores water and waste materialsCell wallSupports cell membrane, maintains cell shape, and protects cellCell membraneBreaks down waste materials and debrisVacuoleProduces proteins for the cellWhich organelle in the table is correctly matched with its function?

A
chloroplast
B
cell wall
C
cell membrane
D
vacuole
12

Consider this animal cell.Which organelles are labeled G?

Question illustration
A
centrioles
B
lysosomes
C
ribosomes
D
mitochondria
13

In what way are the light-dependent and light-independent reactions of photosynthesis similar?

A
Both require chemical energy to proceed.
B
Both occur in the chloroplast.
C
Both produce oxygen as a byproduct.
D
Both involve carbon fixation.
14

Which statement explains how ATP and its phosphate groups are related to the energy that is used in plant processes?

A
ADP loses a phosphate group to create ATP, which stores energy for making sugars.
B
ADP gains a phosphate group to create ATP, which stores energy for making sugars.
C
ADP loses a phosphate group to create ATP; this process instantly releases energy for making sugars.
D
ADP gains a phosphate group to create ATP; this process results from sugar production.
15

To which substance does ferredoxin transfer an electron?

A
photosystem I
B
photosystem II
C
NADP+
D
NADPH
16

Stella wants to test the hypothesis “If carbon dioxide levels increase, the growth rate of sunflowers will increase.” She places five young sunflower plants into similar containers and sets up pumps that release different amounts of carbon dioxide into each container. She plans to measure the daily height of the plants for two weeks and graph the data. Which option would allow Stella to set up a control group for the experiment?

A
She should provide mist to each of the plants except one plant to keep the air moist and fertilize the plants.
B
She should give the plants receiving the least CO2 a little more oxygen to compensate for the difference in gases.
C
She should give all the flowers the same amount of water.
D
She should place one flower in a similar container, but not pump carbon dioxide into it.
17

Which statement correctly describes the process that occurs in the thylakoid?

A
ATP is produced in the thylakoid during light-independent reactions.
B
ATP is produced in the thylakoid during light-dependent reactions.
C
ADP and glucose are produced in the thylakoid during light-independent reactions.
D
ADP and glucose are produced in the thylakoid during light-dependent reactions.
18

Which statement is true for both plants and animals?

A
Plants and animals both use sunlight to generate ATP for energy.
B
Plants and animals both form ADP in the Calvin cycle.
C
Plants and animals both need to consume sugar to store energy.
D
Plants and animals both break a phosphate bond of ATP to release energy.
19

Consider this plant cell.Which organelle is labeled I?

Question illustration
A
nucleus
B
mitochondrion
C
ribosome
D
chloroplast
20

Which event occurs in photosystem I?

A
Water molecules are broken apart.
B
Light energy excites electrons.
C
Oxygen is released as waste.
D
Electrons are transferred to ferredoxin.

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