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Worksheetsphotosynthesis/cellular respiration
Total questions: 14
Worksheet time: 8mins
1. What is chlorophyll and how does it help plants?
A.Chlorophyll is a pigment that absorbs light energy and makes glucose.
B.Chlorophyll is a protein that changes shape in the presence of sunlight.
C.Chlorophyll is a receptor that binds carbon dioxide when energized by light
D.Chlorophyll is an enzyme that catalyzes the production of glucose when exposed to light.
Which type of organism would MOST likely benefit directly from increased levels of CO2?
mushroom
tree
bird
fish
Which of the following is produced during the process of cellular respiration?
carbon dioxide
sodium chloride
oxygen
sugar
7. How does a human body get energy?
Sunlight on the skin produces energy.
Water provides the majority of energy.
Food and oxygen combine to deliver energy
Sleep provides energy stored at night for the next day.
Which two things are produced when a plant breaks down sugar to release energy?
oxygen and food
carbon dioxide and food
oxygen and carbon dioxide
carbon dioxide and water
If a single-celled organism that uses photosynthesis has its source of light removed, it will
divide repeatedly.
produce less energy.
grow in size.
generate more waste.
Which process is considered to be a part of the carbon cycle?
precipitation
metamorphosis
condensation
photosynthesis
How will clear-cutting of forests affect the level of carbon dioxide in the atmosphere?
It will decrease because of increased respiration.
It will increase because of decreased photosynthesis.
It will decrease because of decreased photosynthesis.
It will remain constant as respiring animals remove the carbon dioxide.
Which statement accurately describes an interaction between plants and animals?
Animals release CO2, required for photosynthesis.
Animals release O2, required for plant survival.
Plants provide humans with atmospheric nitrogen.
Plants provide humans with CO2 for respiration.
6. Which of the following represents the process of photosynthesis?
C6H12O6+6O2→6CO2+6H2O
6CO2+6H2O→C6H12O6+6O2
2H2O→2H2+O2
2H2+O2→2H2O
Beneath the outer layer of tree bark is a layer of live tissue. The cells of this live tissue contain chloroplasts. The bark also contains structures that allow gas exchange with the environment. These characteristics allow the tree bark to perform photosynthesis. Tree bark photosynthesis occurs mostly in early spring and late fall, or in times of drought or disease. What is the MOST likely reason bark photosynthesis is higher during these conditions?
Photosynthesis keeps the bark from freezing.
The bark produces a different type of sugar.
The angle of light is different.
The tree has fewer leaves.
Which of the following BEST describes the flow of energy in a cabbage plant?
Chemical energy is absorbed by mitochondria, stored in sugars, and released in chloroplasts.
Chemical energy is absorbed by chloroplasts, stored in sugars, and released in mitochondria.
Solar energy is absorbed by chloroplasts, converted and stored in sugars, and released in mitochondria.
Solar energy is absorbed by mitochondria, converted and stored in sugars, and released in chloroplasts.
People take in and release gases from the air when they breathe. Which exhaled gas is a waste product of respiration?
helium
oxygen
carbon dioxide
hydrogen
Nitrogen makes up 78% of Earth’s atmosphere. Which statement BEST describes the importance of the nitrogen cycle?
People need nitrogen to breathe.
Nitrogen gas cannot be used directly by most organisms.
Nitrogen needs to combine with oxygen to make water.
Plants need nitrogen for photosynthesis.
