AnswersFirst Semester BiologyPhotosynthesis and Cellular Respiration

Photosynthesis and Cellular Respiration — Unit test Answers

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The graphic below shows how photosynthesis and cellular respiration are related.Which label in the graphic represents the energy that is released from glucose by cellular respiration?

Question illustration
A
Oxygen
B
Glucose
C
Energy stored as ATP
D
Carbon dioxide and water
2
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How is nitrogen returned to the atmosphere during the nitrogen cycle?

A
It is returned to the atmosphere in a process called nitrogen fixation.
B
It is returned to the atmosphere through denitrification.
C
It is returned to the atmosphere through cellular respiration.
D
It is returned to the atmosphere through evapotranspiration.
3

How are the carbon, oxygen, and nitrogen cycles vital to sustaining life on Earth?

A
Carbon, oxygen, and nitrogen are vital components of life on Earth.
B
The carbon, oxygen, and nitrogen cycles allow vital elements to return to usable form by organisms.
C
The carbon, oxygen, and nitrogen cycles are an important interface between biotic and abiotic factors.
D
All of the above are reasons the carbon, oxygen, and nitrogen cycles are vital to life on Earth.
4

An important difference between cellular respiration and photosynthesis is that when cellular respiration begins, glucose molecules are split. However, when photosynthesis begins

A
ADP molecules are split.
B
water molecules are split.
C
oxygen molecules are split.
D
carbon dioxide molecules are split.
5

Which organism would be the best subject for a study of both photosynthesis and cellular respiration?

A
a green plant
B
a chemosynthetic bacterium
C
an animal that eats plants
D
an animal that eats animals
6

Mira analyzed oxygen and carbon dioxide in inhaled and exhaled air. She found that the percentages of both gases were different in each. What other gas would most likely also have different amounts in inhaled and exhaled air?

A
ozone (O3)
B
hydrogen (H2)
C
water vapor (H2O)
D
sulfur dioxide (SO2)
7

The sun is the ultimate source for energy on the Earth.

A
T
B
F
8

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.
9

The table below shows data collected in an experiment about gases in inhaled and exhaled air.Percentages of Chemicals in Air O2CO2Inhaled20.94%0.03%Exhaled16.37%4.46%Suppose a similar experiment was set up to measure changes in air composition immediately before and two days after twenty potted plants were placed in a clear, sealed aquarium near a window. Percentages of Chemicals in Air O2CO2Before 20.94%0.03%After ??How would the second row of values in the plant experiment most likely compare to the second row of values in the original experiment?

A
Oxygen levels would be higher, but carbon dioxide levels would be lower.
B
Carbon dioxide levels would be higher, but oxygen levels would be lower.
C
Oxygen levels would be higher, but carbon dioxide levels would be the same.
D
Carbon dioxide levels would be higher, but oxygen levels would be the same.
10

The need for energy, gained by respiration and photosynthesis, is the driving force of the oxygen cycle.

A
T
B
F
11

Energy is converted from solar to chemical in Process A and then from one form of chemical to another in Process B. Which is described by Process A?

A
energy conservation
B
photosynthesis
C
cellular respiration
D
Krebs cycle
12

Which statement is true for both photosynthesis and cellular respiration?

A
It occurs in consumers.
B
It occurs in producers.
C
It produces carbon dioxide.
D
It produces oxygen.
13

What percentage of precipitation falls back onto land?

A
78%
B
92%
C
17%
D
22%
14

The chemical equation below summarizes cellular respiration.6O2 + C6H12O6 à 6CO2 + 6H2O + energyThe energy that is released by cellular respiration is in the form of

A
dark energy.
B
solar energy.
C
nuclear energy.
D
chemical energy.
15

Biogeochemical cycles on Earth serve a variety of different purposes. What do the biogeochemical cycles have in common?

A
They all serve the same function in sustaining life on Earth.
B
They all include only nonliving components of an ecosystem.
C
They are all essential for sustaining life on Earth.
D
They all include only living components of an ecosystem.
16

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

A
precipitation
B
evaporation
C
carbonation
D
condensation
17

Biogeochemical cycles recycle water and natural elements throughout the biosphere to ensure that organisms do not run out of these substances. Thiobacillus denitrificans is a specialized species of bacteria that obtains its energy from carbon dioxide and inorganic nitrogen-containing compounds such as nitrates in its environment. It is used in the bioremediation of groundwater that contains excess nitrate. How does Thiobacillus denitrificans help bioremediate groundwater?

A
nitrification
B
denitrification
C
nitrogen fixation
D
decomposition
18

Which is the relationship between photosynthesis and cellular respiration?

A
Cellular respiration makes the glucose that is needed by photosynthesis.
B
Photosynthesis makes the glucose that is broken down by cellular respiration.
C
Cellular respiration converts the glucose that is made by photosynthesis to oxygen.
D
Photosynthesis converts the glucose that is made by cellular respiration to carbon dioxide.
19

Hon placed aquatic plants in several test tubes that were filled with water. Then, he placed half of the test tubes in a dark closet and the other half in a well-lit room. When he recorded his data, some of the plants had formed many small bubbles on the leaves, and some did not. Which describes what Hon most likely observed and the reason for these results?

A
The plants in the dark formed bubbles because they released hydrogen gas.
B
The plants in the dark formed bubbles because they released water vapor.
C
The plants in the light formed bubbles because they released carbon dioxide gas.
D
The plants in the light formed bubbles because they released oxygen gas.
20

The biogeochemical cycles move through biotic and abiotic regions.

A
T
B
F

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