Chapter 10 - Photosynthesis Test

What does the chemiosmotic process in chloroplasts involve?

• using the proton gradient across the thylakoid membrane to drive ATP synthesis.

• reduction of water to produce ATP energy

• diffusion of electrons through the thylakoid membrane

• formation of glucose, using carbon dioxide, NADPH, and ATP

• movement of water by osmosis into the thylakoid space from the stroma

What is the primary function of the Calvin cycle?

• use NADPH to release carbon dioxide

• split water and release oxygen

• use ATP to release carbon dioxide

• transport RuBP out of the chloroplast

• synthesize G3P from carbon dioxide

Which of the following statements best describes the relationship between photosynthesis and respiration?

• ATP molecules are produced in photosynthesis and used up in respiration.

• Respiration runs the biochemical pathways of photosynthesis in reverse.

• Photosynthesis stores energy in complex organic molecules, whereas respiration releases energy.

• Respiration is anabolic and photosynthesis is catabolic.

• Photosynthesis occurs only in plants and respiration occurs only in animals.

Tags

NGSS.HS-LS2-5

Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of algae to different wavelengths of light. He added aerobic bacteria and then noted in which areas the bacteria congregated. He noted that the largest groups were found in the areas illuminated by the red and blue light.

What did Engelmann conclude about the congregation of bacteria in the red and blue areas?

• Bacteria released excess carbon dioxide in these areas.

• Bacteria congregated in these areas due to an increase in the temperature of the red and blue light.

• Bacteria congregated in these areas due to an increase in the temperature caused by an increase in photosynthesis.

• Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths.

• Bacteria congregated in these areas because these areas had the most oxygen being released.

Tags

NGSS.HS-LS1-5

Photorespiration occurs when rubisco reacts RuBP with

• O2

• glyceraldehyde 3–phosphate.

• 3–phosphoglycerate.

• NADPH.

• CO2

Reduction of oxygen to form water occurs during

• neither photosynthesis nor respiration.

• the dark reactions only.

• both photosynthesis and respiration.

• respiration only.

• photosynthesis only.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?

• the absorption of light energy by chlorophyll

• the flow of electrons from photosystem II to photosystem I

• the reduction of NADP+

• the splitting of water

• the synthesis of ATP

Tags

NGSS.HS-LS1-5

A chemical reaction that has a positive DG is best described as

• exergonic.

• spontaneous

• entropic

• endergonic

• enthalpic

Tags

NGSS.HS-PS1-4

Which of the following sequences correctly represents the flow of electrons during photosynthesis?

• H2O ® photosystem I ® photosystem II

• NADPH ® chlorophyll ® Calvin cycle

• NADPH ® electron transport chain ® O2

• H2O ® NADPH ® Calvin cycle

• NADPH ® O2 ® CO2

Tags

NGSS.HS-LS1-5

When oxygen is released as a result of photosynthesis, it is a direct by–product of

• the electron transfer system of photosystem II.

• chemiosmosis across the thylakoid membrane.

• reduction of NADP+ by FNR.

• splitting water molecules in photolysis.

• the electron transfer system of photosystem I.