Group 2 9B 9C

9B Which statement accurately describes the energy needs for photosynthesis and cellular respiration?

• Solar energy is needed for cellular respiration but not for photosynthesis.

• Chemical energy in the form of glucose is needed for both cellular respiration andphotosynthesis.

• Chemical energy in the form of glucose is needed for photosynthesis, and solar energy is needed for cellular respiration.

• Solar energy is needed for photosynthesis, and chemical energy in the form of glucose is needed for cellular respiration.

9C The graphs show the reaction rate for an enzyme across a range of temperatures and pH.

Based on these data, this enzyme functions best at what temperature and pH?

• Temperature of 27°C and a pH of 4

• Temperature of 37°C and a pH of 6

• Temperature of 40°C and a pH of 8

• Temperature of 50°C and a pH of 10

9B Which statement explains how producers are dependent upon consumers for their survival?

• Consumers supply oxygen for producers to undergo aerobic respiration.

• Consumers produce carbon dioxide for producers to use during photosynthesis.

• Consumers provide chemical energy needed by producers for cellular respiration.

• Consumers make lactic acid that producers use in photosynthesis.

9C: Taq polymerase is an enzyme used in the polymerase chain reaction (PCR) to replicate fragments of DNA. A study published in 1976 examined the properties of Taq polymerase after the enzyme was isolated from Thermus aquaticus, a thermophilic bacterium that lives in the hot springs of Yellowstone National Park. The graph shows one of the results of the study. Which statement about enzyme activity is best supported by this graph?

• An enzyme must be composed of multiple polypeptides, or subunits, to be active

• An enzyme's rate of activity increases with time until it becomes inactive

• An enzyme functions best under specific temperature conditions

• An enzyme works equally well in bacteria that are adapted to high temperatures and in eukaryotic cells such as human cells.

9B Diatoms are one of the most common types of phytoplankton in marine habitats. Like plants, diatoms contain chlorophyll and produce glucose from which of the following?

• O₂ and ATP

• CO₂ and O₂

• ATP and H₂O

• CO₂ and H₂O

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NGSS.MS-LS1-6

9B Cells can generate as many as 36 to 38 molecules of adenosine triphosphate (ATP) from the metabolism of one molecule of glucose. Which cellular process results in this amount of ATP production?

• Anaerobic cellular respiration

• Protein synthesis

• Aerobic cellular respiration

• Photosynthesis

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NGSS.MS-LS1-7

9C: The diagram represents one way an enzyme can be inhibited. Which statement explains the effect of an inhibitor on an enzyme?

• A substrate will be able to bond with the enzyme

• The enzyme will likely be attacked by immune cells

• The enzyme will be unable to produce more enzymes

• A substrate will be unable to attach to the enzyme

9B: Which statement best describes the relationship between the products of photosynthesis and the reactants in cellular respiration?

• The products of photosynthesis serve as the reactants in cellular respiration to provide chemical energy

• The products of photosynthesis combine with the reactants in cellular respiration to remove ATP from cells

• The products of photosynthesis inhibit the reactants in cellular respiration in the presence of light

• The products of photosynthesis change the structure of the reactants in cellular respiration in the presence of light.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

9B Most plant leaves take in more carbon dioxide as light increases. They give off carbon dioxide if light intensity is too low. The graph shows a plant’s carbon dioxide levels at different light intensities.

At point X, the rate of which process is equal to the rate of photosynthesis?

• Cellular respiration

• Transpiration

• Growth

• Reproduction

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NGSS.MS-LS1-6

What are the reactants in the equation for cellular respiration?

• oxygen and lactic acid
• carbon dioxide and water
• glucose and oxygen
• water and glucose

Tags

NGSS.MS-LS1-7