Unit 3 Review - How Food Molecules are Produced

Which phrase should be placed in box X to complete the flowchart?

• increased use of starch in root cells

• increased concentration of glucose in leaf cells

• decreased ATP in root cells

• decreased concentration of oxygen in leaf cells

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Organisms living in a forest ecosystem rely on the sun as a source of energy for metabolic processes. The following events occur as energy is captured by a plant and used in the metabolic processes of an herbivore.

Put the events in order.

• energy is stored in large organic molecules

• energy is released from chemical bonds

• energy is absorbed by plant cells

• energy is transferred to molecules of ATP

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NGSS.MS-LS1-6

NGSS.MS-LS1-7

NGSS.MS-LS2-3

A cell in the leaf of a corn plant contains more chloroplasts than a cell in stem of a corn plant. Based on this observation, it can be inferred that, when compared to the cell in the stem, the cell in the leaf:

• synthesizes more sugar

• produces fewer proteins

• has a higher chromosome count

• uses less carbon dioxide

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NGSS.MS-LS1-2

NGSS.MS-LS1-6

During the process of photosynthesis, energy from the sun is converted into

• chemical energy in the bonds of inorganic molecules

• chemical energy in the bonds of organic molecules

• enzymes used to produce inorganic molecules

• enzymes used to produce organic molecules

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which statement best describes the starch content of two leaves taken from the plants shown in the chart?

• neither leaf contains starch

• both leaves contain the same amount of starch

• Leaf A contains more starch than leaf B

• Leaf B contains more starch than leaf A

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NGSS.MS-LS1-5

NGSS.MS-LS1-6

This diagram represents a plant cell.

For the purpose of plant nutrition, the arrow labeled A would most likely represent the movement of

• glucose, water, and heat energy

• carbon dioxide, oxygen, and heat energy

• carbon dioxide, water, and solar energy

• oxygen, glucose, and solar energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A small water plant was placed in bright sunlight for five hours as shown in the picture. Bubbles of oxygen gas were observed being released from the plant.

What substance most likely was absorbed from the water for the process that produces the oxygen gas?

• glucose

• potassium

• dissolved nitrogen

• carbon dioxide

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NGSS.MS-LS1-6

Which process is directly responsible for the release of oxygen during photosynthesis?

• Calvin cycle

• Glycolysis

• Light-dependent reactions

• Krebs cycle

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NGSS.MS-LS1-6

In which part of the plant cell does the Calvin cycle take place?

• Thylakoid membrane

• Chloroplast stroma

• Vacuole

• Cell wall

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NGSS.HS-LS1-5

NGSS.HS-LS2-5

What is the primary function of chlorophyll in photosynthesis?

• Absorb sunlight

• Produce glucose

• Release oxygen

• Absorb water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3