AnswersMO-Biology AThe Function of Organelles

The Process of Photosynthesis Answers

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Which is the main light-absorbing pigment for photosynthesis?

A
carotene
B
chlorophyll
C
hemoglobin
D
anthocyanin
2
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Johannes wants to know whether soil, water, or both are needed for plant growth. He chooses to conduct experiments on a willow tree for five years to answer his question. How can his experimental methods be changed to improve his experiment?

A
He needs to ask scientists what they think.
B
He needs to conduct the experiment for a longer period.
C
He needs to use a larger sample size.
D
He needs to test more factors in the environment.
3

Which statement best describes what a thylakoid does during photosynthesis?

A
surrounds the grana and keeps them moist
B
enables the light-dependent reactions to occur
C
combines carbon dioxide and water to make sugar
D
helps the light-independent reactions to occur
4

Which of these statements is true about autotrophs, but not heterotrophs?

A
They use sugar and oxygen to make carbon dioxide and water.
B
They use chlorophyll and oxygen to make carbon dioxide and water.
C
They use sunlight, water, and carbon dioxide to make sugars.
D
They use sunlight, water, and oxygen to make chlorophyll.
5

Which statement summarizes a change that occurs during photosynthesis?

A
It converts visible light to high-energy gamma rays.
B
It converts carbon to oxygen.
C
It converts light energy to chemical energy.
D
It converts energy to mass.
6

In which situation would it be least likely for a scientist to revise her experimental methods?

A
if her results support her hypothesis
B
if her data do not support her hypothesis
C
if no conclusions can be drawn from the data
D
if results are the same after repeating the procedure
7

Consider the formula for glucose: C6H12O6. In the processes of photosynthesis, what supplies the hydrogen (H) used in the formation of glucose?

A
light energy
B
carbon dioxide
C
chlorophyll
D
water
8

Which statement best describes the relationship of photosynthesis and energy?

A
The process of photosynthesis is energy-storing because the process converts light energy into chemical energy, which is stored in the bonds of glucose.
B
The process of photosynthesis is energy-releasing because the process converts light energy into free energy that can be used for cell functions.
C
The process of photosynthesis is energy-conserving because no energy is used throughout the process of forming glucose and oxygen molecules.
D
The process of photosynthesis is energy-wasting because photosynthesis is an inefficient process that depletes the cell of energy stored in the bonds of glucose.
9

Which is an example of why the process of photosynthesis is important to life on Earth?

A
Grass uses photosynthesis to produce glucose, which is used within the grass for growth.
B
Fungi use photosynthesis to decompose dead and decaying plant matter.
C
Ectothermic animals use photosynthesis to convert sunlight into energy for cell functions.
D
Green plants use photosynthesis to remove oxygen gas from the atmosphere and replenish the earth’s carbon dioxide.
10

How are the products represented in the chemical equation for photosynthesis?

A
O2 + 6CO2
B
C6H12O6 + 6H2O
C
6CO2 + 6H2O
D
C6H12O6 + 6O2

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