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Exam 7: Photosynthesis

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Question 21

Multiple Choice

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While C₄ plants have carbon dioxide fixation and carbon dioxide uptake separated by location within the plant,CAM plants

A) have these processes separated by time.
B) fix much greater amounts of carbon dioxide than C₄ plants.
C) are found in tropical regions where nutrients are abundant.
D) have these processes separated among two leaf types.

E) C) and D)
F) A) and B)

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Question 22

Multiple Choice

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Oxygen production in photosynthesis involves which of the following? Select all that apply.

A) photosystem I
B) photosystem II
C) splitting of water
D) light reactions
E) Calvin cycle

F) C) and D)
G) A) and C)

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Question 23

Multiple Choice

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During the light reactions,what structure is responsible for absorbing the solar energy?

Correlate the relative efficiency of CAM,C₃,and C₄ plants in photosynthesis with the enzymatic systems active in this process.

Use the data provided to identify the lines on the graph as the absorption spectrums of chlorophyll a,chlorophyll b,and the carotenoids. Max.absorption of chlorophyll a-430 & 662 nm Max.absorption of chlorophyll b-453 & 642 nm Max.absorption of carotenoids-bimodal; approx.450 & 490 nm

Which is most closely associated with the Calvin cycle?

If the photosynthetic rate of C₄ plants such as sugarcane,corn,and Bermuda grass is about two or three times that of C₃ plants-and both are substantially more productive than CAM plants-then why,over time,have C₄ plants not outcompeted and eliminated C₃ and CAM plants?

What are the end products of photosynthesis?

Which of the following organisms are capable of photosynthesis?

In the questions that follow, you will be asked to identify the blanks on the below diagram using the word bank: NADPH, NADP, ATP, ADP + P, carbon dioxide, oxygen, carbohydrate, water. Briefly explain the significance of each item. -C is ________.

The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule,which decreases cell carbon dioxide levels,which increases the diffusion gradient.

The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule,which immediately becomes a six-carbon sugar that is the base for starch,sucrose,cellulose,etc.

Photorespiration is the process by which light is used to release the stored energy in carbohydrate molecules to perform all work in plant cells.

Plants that conduct C₄ metabolism are desert plants.

In the questions that follow, you will be asked to identify the blanks on the below diagram using the word bank: NADPH, NADP, ATP, ADP + P, carbon dioxide, oxygen, carbohydrate, water. Briefly explain the significance of each item. -A is ________.

The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule,which forms a six-carbon molecule that breaks down into two 3PG molecules.

Which of the following are characteristics of C₄ plants? Select all that apply.

________ is a product of the Calvin cycle that is used to form glucose phosphate,amino acids or fatty acids.

Which of the following plants is an example of a CAM plant?

The fixation of carbon dioxide in the first step of the Calvin cycle is facilitated by which enzyme?