AnswersFirst Semester BiologyPhotosynthesis and Cellular Respiration

Photosynthesis and Cellular Respiration — Unit test Answers

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1
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Which of the following does not take place in the water cycle?

A
precipitation
B
evaporation
C
carbonation
D
condensation
2
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Which of the following statements is true?

A
The nitrogen cycle is the most important cycle for life.
B
The oxygen cycle is the least important cycle for life.
C
Life can be sustained without any of the cycles for life present.
D
All cycles of matter are equally important for life to be sustained.
3

Nitrogen-fixing bacteria convert atmospheric nitrogen into forms of nitrogen that living things can use. Please select the best answer from the choices provided

A
T
B
F
4

What is the relationship between the oxygen cycle and the carbon cycle?

Answer not available
5

Explain the possible consequences if the Earth continues to absorb more energy than it emits.

Answer not available
6

How is the phosphorus cycle different from the oxygen, nitrogen, and carbon cycles?

A
It occurs at the fastest rate.
B
It is not essential to life.
C
It does not occur naturally.
D
It does not involve the atmosphere.
7

What is the role of the water cycle in sustaining life?

Answer not available
8

The chemical equation below summarizes the process of photosynthesis.6CO2 + 6H2O + energy à 6O2 + C6H12O6Where is the energy shown in the equation transferred as a result of photosynthesis?

A
into water
B
into the air
C
into sugars
D
into the ground
9

Recall that photosynthesis consists of two sets of chemical reactions. Which of these describes the energy conversions that occur during the light-independent reactions?

A
light energy à chemical energy
B
chemical energy à chemical energy
C
chemical energy à mechanical energy
D
mechanical energy à mechanical energy
10

How are mitochondria similar to chloroplasts?

A
Both have many layers of membranes.
B
Both contain molecules of chlorophyll.
C
Both are found in the cells of consumers.
D
Both are needed for cells to store energy.
11

The carbon cycle involves an exchange of carbon between _______.

A
the geosphere and atmosphere
B
the atmosphere and hydrosphere
C
the geosphere and hydrosphere
D
the geosphere, hydrosphere, and atmosphere
12

Which is an energy conversion that occurs during cellular respiration?

A
ADP à ATP
B
FADH2 à FAD
C
pyruvate à glucose
D
light energy à chemical energy
13

Explain how the need for energy is the driving force of the oxygen cycle.

Answer not available
14

The process in which nitrogen is converted into a usable form for life is called _______.

A
nitrogen fixation
B
photosynthesis
C
greenhouse effect
D
photolysis
15

What is the ultimate source of energy for the Earth?

A
photosynthesis
B
respiration
C
the sun
D
nutrient cycles

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