Cellular Respiration and Photosynthesis

As the depth of the ocean increases, the amount of light that penetrates to that depth decreases. At about 200 meters, little, if any, light is present. The accompanying graph illustrates the population size of four different species at different water depths.
Which species most likely performs photosynthesis?

• Species A

• Species B

• Species C

• Species D

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The graph below shows the results of an experiment in which a container of oxygen-using bacteria and strands of a green alga were exposed to light of different colors.
Which statement best explains the results of this experiment?

• The rate of photosynthesis is affected by variations in the light.

• In all environments light is a vital resource.

• The activities of bacteria and algae are not related.

• Uneven numbers and types of species can upset ecosystem stability.

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Which statement best describes cellular respiration?

• It occurs in animal cells but not in plant cells.

• It converts energy in food into a more usable form.

• It uses carbon dioxide and produces oxygen.

• It stores energy in food molecules.

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In the accompanying demonstration, which process performed by the peas when they start to grow causes the drop of liquid to move to the left?

• Protein synthesis

• Photosynthesis

• Digestion

• Cellular respiration

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Which substance is the most direct source of the energy that an animal cell uses for the synthesis of materials?

• ATP

• Glucose

• DNA

• Starch

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The diagram below represents the setup for an experiment. Two black paper discs are opposite each other on both sides of each of two leaves.

This experimental setup would most likely be used to show that

• Glucose is necessary for photosynthesis

• Protein is a product of photosynthesis

• Light is necessary for photosynthesis

• Carbon dioxide is a product of photosynthesis

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Which phrase best describes cellular respiration, a process that occurs continuously in the cells of organisms?

• Removal of oxygen from the cells of an organism

• Conversion of light energy into the chemical bond energy of organic molecules

• Transport of materials within cells and throughout the bodies of multicellular organisms

• Changing of stored chemical energy in food molecules to a form usable by organisms

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Base your answers to the questions on the information and diagram below and on your knowledge of biology.

A live plant was placed in a closed container in a lab. Sensors were set up to monitor the levels of oxygen in the container over several hours.

During the 8 hours studied, the plant performed

• Photosynthesis, only

• Respiration, only

• Both photosynthesis and respiration

• Neither photosynthesis nor respiration

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Base your answers to the following questions on the information and diagram below and on your knowledge of biology.

A small water plant (elodea) was placed in bright sunlight for five hours as indicated below. Bubbles of oxygen gas were observed being released from the plant.

Since oxygen gas is being released, it can be inferred that the plant is

• Producing glucose

• Releasing energy from water

• Making protein

• Carrying on active transport

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Base your answers to the following questions on the information and diagram below and on your knowledge of biology. The diagram represents a plant leaf cell and two different molecules used in the process of glucose synthesis.

Molecules 1 and 2 are most likely

• Carbon dioxide and oxygen

• Carbon dioxide and water

• Nitrogen and oxygen

• Nitrogen and water

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