Bioenergetics Practice Questions

Which statement best describes a direct role of ATP in a paramecium?

• ATP provides the energy to move cilia.

• ATP stores the genetic code for replication.

• ATP signals the presence of other nearby organisms.

• ATP senses changes in the surrounding aquatic environment.

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Which statement best describes the role of ATP in a living system?

• ATP senses and adjusts the pH in the cellular environment

• ATP identifies and repairs weak components of cells and tissues

• ATP measures and provides heat to increase reaction rates in cells

• ATP captures and transfers energy released by the breakdown of glucose

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A scientist observed that during the course of a chemical reaction the number of ATP molecules was reduced. What did the scientist most likely learn from the observation?

• The reaction produced water.

• The reaction consumed water.

• The reaction caused an output of energy.

• The reaction required an input of energy.

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An organism carries out both photosynthesis and cellular respiration. Which statement describes a difference between these two processes?

• Only cellular respiration creates chemical energy

• The processes occur in different types of animal cells

• Only photosynthesis changes light energy into chemical energy

• The processes occur at different times during the animal's life cycle

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Which statement best describes a relationship between mitochondria and chloroplasts?

• Mitochondria release chemical energy from molecules and store it in chloroplasts.

• Chloroplasts release chemical energy from molecules and store it in mitochondria.

• Mitochondria convert chemical energy into light energy that can be used by chloroplasts.

• Chloroplasts convert light energy into chemical energy that can be used by mitochondria.

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Which statement best describes both mitochondria and chloroplasts?

• They both contain their own RNA and are involved in transcription

• They both contain their own DNA and are involved in energy conversions

• They both contain their own DNA and are involved in controlling the activities of a cell

• They both contain their own RNA and are involved in storage of nuclear genetic material

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Muscle cells have a comparatively large number of mitochondria. Which action does this characteristic allow muscle cells to accomplish?

• rapidly release chemical energy for use

• rapidly convert carbohydrates into lipids

• reduce oxygen demand when releasing stored energy

• reduce carbon dioxide production when releasing stored energy

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Which statement best explains why cellular respiration in plants and other organisms is dependent on photosynthesis?

• Photosynthesis is one of the final steps in cellular respiration.

• Photosynthesis provides the materials that fuel cellular respiration.

• Photosynthesis absorbs excess energy produced by cellular respiration.

• Photosynthesis absorbs materials that are catalyzed during cellular respiration.

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A cell in the leaf of a green plant performs both photosynthesis and cellular respiration, often at the same time. Which statement best describes how these processes are related to each other?

• Both processes produce carbon dioxide.

• Both processes require energy directly from the Sun.

• Products of one process are used as some of the reactants for the other process.

• Thermal energy from one process is used as the energy source for the other process.

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Many plants have a waxy coating on their leaves. Which statement describes the most likely structure and function of the waxy coating?

• The waxy coating is a protein that can help attract other organisms for pollination.

• The waxy coating is a protein that can help release waste molecules during transpiration.

• The waxy coating is a lipid that can help absorb more sunlight in hot environments.

• The waxy coating is a lipid that can help prevent excess water loss in dry environments.