Photosynthesis

A student set up a small freshwater fish tank. The tank included water, fish, gravel, a snail, and plants, as represented below.

• Fish and snails, only

• Fish, snails, and plants

• Plants, only

• Snails and plants, only

Tags

NGSS.HS-LS2-6

Which variable was MOST LIKELY measured and should be placed on the y-axis of the graph shown to represent the rate of photosynthesis, and which explanation provided accurately describes the role of that variable in the cycling of matter during photosynthesis?

• Oxygen production; Oxygen is released as a byproduct during photosynthesis, indicating the rate at which photosynthesis occurs.

• Carbon dioxide uptake; Carbon dioxide is consumed during photosynthesis, showing the rate of photosynthesis.

• Glucose production; Glucose is synthesized during photosynthesis, reflecting the rate of photosynthesis.

• Water uptake; Water is absorbed and used in photosynthesis, representing the rate of photosynthesis.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Which of the following would be the best indicator of the rate of photosynthesis in the experiment described?

• ATP released because it is a product of photosynthesis

• CO₂ consumption because it is a reactant of photosynthesis

• H₂O released because it is a product of photosynthesis

• O₂ consumption because it is a reactant of photosynthesis

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

• synthesizes more sugar

• has a higher chromosome count

• produces fewer proteins

• uses less carbon dioxide

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

The diagram represents a plant leaf cell and two different molecules used in the process of glucose synthesis. What compounds are most likely represented by Molecules 1 and 2?

• carbon dioxide and oxygen

• carbon dioxide and water

• nitrogen and oxygen

• nitrogen and water

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Why do leaves change color in the fall?

• A. Chlorophyll breaks down and no longer masks the colors of other pigments.

• B. Green-colored chlorophyll breaks down and turns red and yellow.

• C. Green pigments break down and no longer mask the color of chlorophyll.

• D. Red- and yellow-colored pigments grow and mask green-colored chlorophyll.

Which equation best represents the process of photosynthesis?

• A 6CO₂ + 6H₂O + light → C₆H₁₂O₆ + 6O₂

• B 6CO₂ + 6H₂O → light + C₆H₁₂O₆ + 6O₂

• C C₆H₁₂O₆ + 6O₂ → light + 6CO₂ + 6H₂O

• D C₆H₁₂O₆ + 6O₂ + light → 6CO₂ + 6H₂O

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Which explains the sequence of energy transformations during photosynthesis?

• A Chemical energy is transformed into heat energy.

• B Chemical energy is transformed into light energy.

• C Heat energy is transformed into light energy.

• D Light energy is transformed into chemical energy.

Tags

NGSS.HS-LS1-5

What kinds of organisms carry out photosynthesis?

• bacteria, algae, and fungi

• bacteria, fungi, and plants

• plants, algae, and bacteria

• plants, algae, and fungi

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

How do plants capture light energy for use in photosynthesis?

• Green light from the visible spectrum is reflected off the surfaces of leaves.

• Light energy is absorbed by chlorophyll and other pigments in cell walls.

• Light energy is absorbed by chlorophyll and other pigments in chloroplasts.

• Photons of ultraviolet light excite the chlorophyll molecules found in chloroplasts.

Tags

NGSS.HS-LS1-5