AnswersPA Human Anatomy Physiology A 2026-2027 WHITE ICCatalysts

ATP Answers

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1
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Which label identifies the part of the ATP molecule that changes when energy is released in the cells of all living things?

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A
A
B
B
C
C
D
D
2
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During a high-energy athletic event, such as a sprint, most of the energy that is provided to the muscles comes from

A
glycolysis.
B
the electron transport chain.
C
the Krebs cycle.
D
fermentation.
3

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.
4

What are the components of adenosine triphosphate (ATP)?

A
sugar + three phosphates
B
adenosine + one phosphate
C
base + three phosphates
D
base + sugar + three phosphates
5

Can green plants and humans use the same process to create ATP?

A
No; green plants can use only photosynthesis, and humans use only cellular respiration.
B
No; green plants can use only the Krebs cycle, and humans can use only the Calvin cycle.
C
Yes; green plants and humans can both use photosynthesis to create ATP.
D
Yes; green plants and humans can both use cellular respiration to create ATP.
6

Which characteristic best distinguishes glycolysis and the Krebs cycle from the electron transport chain?

A
the amount of ATP produced
B
the location in which they occur
C
whether glucose is broken down
D
whether they occur in plants or animals
7

Which structure in this plant cell represents the site of ATP production from photosynthesis?

Question illustration
A
A
B
B
C
C
D
D
8

Photosynthetic algae create sugars that will eventually be broken down during which process?

A
glycolysis, during respiration
B
the Calvin cycle, during photosynthesis
C
electron transport chain, during respiration
D
the Krebs cycle, during photosynthesis
9

How is sunlight used in photosynthesis?

A
Sunlight controls the amount of water in plant cells.
B
Sunlight is a nutrient for plants.
C
Sunlight is converted to chemical energy.
D
Sunlight breaks cell walls to allow energy in and out.
10

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.
11

Energy is released from ATP when

A
a fourth phosphate is added to the molecule.
B
the last phosphate bond is broken.
C
all three phosphate bonds are formed.
D
the last phosphate bond is formed.
12

ATP is produced during the process of cellular respiration. Which is the order of the steps of cellular respiration?

A
Krebs cycle ® Calvin cycle ® electron transport chain
B
electron transport chain ® Krebs cycle ® glycolysis
C
glycolysis ® Krebs cycle ® electron transport chain
D
Calvin cycle ® electron transport chain ® glycolysis
13

During a high-energy athletic event, such as a sprint, most of the energy that is provided to the muscles comes from

A
glycolysis.
B
the electron transport chain.
C
the Krebs cycle.
D
fermentation.
14

How is sunlight used in photosynthesis?

A
Sunlight controls the amount of water in plant cells.
B
Sunlight is a nutrient for plants.
C
Sunlight is converted to chemical energy.
D
Sunlight breaks cell walls to allow energy in and out.
15

Producers, such as those that make the foods that are shown below, make glucose during the process of photosynthesis. Where in the cell is the glucose produced?

Question illustration
A
in mitochondria
B
in chloroplasts
C
in cytoplasm
D
in water
16

In organisms other than plants, when and where is the most ATP produced?

A
in cytoplasm, during photosynthesis
B
in nuclei, during cellular respiration
C
in chloroplasts, during photosynthesis
D
in mitochondria, during cellular respiration
17

During germination, peas sprout and grow. The data table shows the carbon dioxide produced during the germination period of peas under different conditions.ConditionRate of carbon dioxide produced (mL/min)Germinating peas, 10ºC0.01Germinating peas, 20ºC0.02What is the best conclusion?

A
The rate of cellular respiration in germinating peas is exactly one thousand times the rate of ATP production.
B
Germinating peas at 10ºC create carbon dioxide at a rate of 0.01 mL/min during ATP production.
C
Germinating peas at 20ºC have a higher rate of cellular respiration than germinating peas at 10ºC.
D
The rate of cellular respiration cannot be measured without knowing the rate of ATP production.
18

Can green plants and humans use the same process to create ATP?

A
No; green plants can use only photosynthesis, and humans use only cellular respiration.
B
No; green plants can use only the Krebs cycle, and humans can use only the Calvin cycle.
C
Yes; green plants and humans can both use photosynthesis to create ATP.
D
Yes; green plants and humans can both use cellular respiration to create ATP.
19

Which structure in this plant cell represents the site of ATP production from photosynthesis?

Question illustration
A
A
B
B
C
C
D
D

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