Keystone Biology Chemical Basics of Life

Four students classified the main energy conversions that occur during photosynthesis and cellular respiration. Which student best classified the energy conversions that occur in the two processes?

• Student 1

• Student 2

• Student 3

• Student 4

Tags

NGSS.HS-LS1-5

NGSS.HS-LS1-7

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.

Tags

NGSS.HS-PS3-2

A student made lists of structures observed in cells from two different organisms. Which statement describes the most likely difference in the way that organism 1 and organism 2 obtain energy?

• Only organism 1 uses solar energy to make energy-rich compounds.

• Only organism 1 stores solar energy until it is needed for its life processes.

• Only organism 2 produces molecules for long-term energy storage.

• Only organism 2 transforms food energy into ATP during cellular respiration.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS1-7

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.

Tags

NGSS.HS-LS2-5

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.

Tags

NGSS.HS-LS1-7

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.

Tags

NGSS.HS-LS2-5

Which process uses the products of photosynthesis as reactants?

• Active transport

• cellular respiration

• DNA replication

• protein synthesis

Tags

NGSS.HS-LS1-7

Plant cells use sunlight to make their own food. Which structure allows plant cells to perform this function?

• nucleus

• vacuole

• chloroplast

• mitochondrion

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

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.

Tags

NGSS.HS-LS2-5

A plant cell uses the molecules in the list to synthesize a protein. What role do the ATP molecules play in the protein synthesis process?

• They provide energy.

• They increase activation energy.

• They convert energy into hereditary information.

• They absorb excess energy to prevent overheating.

Tags

NGSS.HS-LS1-7