Question

question 16
mrs. wright (who is always right, just ask her), is caring for her sons prize tomato plants while he attends a tomatologist conference.
she brings them into the house due to a pending ice storm and places them in a dark room. she provides plenty of water and soil nutrients, but does not turn on the lights to conserve energy.
which of the following is most likely to occur first?
○ a fermentation will begin in the chloroplasts of the leaf cells.
○ b photosynthesis will end abruptly, as mrs. wade is a plant murderer.
○ c calvin cycle will continue fas long as the products from the light dependent cycle and co2 are available.
○ d light dependent cycle will continue at the same rate with adequate water and nutrients.

Explanation:

• Option a: Fermentation occurs in the cytoplasm, not chloroplasts. Chloroplasts are for photosynthesis.
• Option b: While Mrs. Wright's action (placing plants in dark) will affect photosynthesis, it's not an immediate "abrupt end" as some processes can continue briefly with existing products.
• Option c: The Calvin cycle (light - independent cycle) can continue as long as ATP and NADPH (from light - dependent cycle) and \(CO_2\) are available. When the light is turned off, the light - dependent cycle stops producing new ATP and NADPH, but the Calvin cycle can use the previously produced ATP and NADPH for a short time.
• Option d: The light - dependent cycle requires light. Since the room is dark, the light - dependent cycle will slow down and stop, not continue at the same rate.

Answer:

C. Calvin cycle will continue as long as the products from the light dependent cycle and \(CO_2\) are available.