ScienceBiologyPhotosynthesis In Plants example #1850
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Photosynthesis In Plants

Eliana Cook avatar Eliana Cook
25 July 2022
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question
Which of the following is required for photosynthesis to take place? a. sugar b. oxygen c. ATP d. water
answer
d. water
question
Which type of carbon fixation stores carbon dioxide in acid form? a. C3 b. C4 c. CAM d. all of the above
answer
c. CAM
question
Compare the process of carbon fixation in C3 plants to that of C4 plants.
answer
C3 plants are adapted to moderate temperatures and sunlight. C3 carbon fixation is the process used for most plants. In C3 carbon fixation, carbon dioxide first combines with a 3-carbon compound while in C4 carbon fixation, carbon dioxide first combines with a 4-carbon compound. Plant stomata are open during the day in both types of carbon fixation. In C3 plants, carbon fixation occurs throughout the leaf. The 4-carbon compound made in plants using C4 carbon fixation is used to deliver carbon dioxide to inner cells of the leaf.
question
Which of the following is a product of photosynthesis? a. sugar b. carbon dioxide c. water d. light
answer
a. sugar
question
Compare the light and dark reactions that occur in plants.
answer
The light reactions occur when light is absorbed by the chlorophyll in plants. This light energy is converted to chemical energy in the thylakoids of the chloroplasts in the form of ATP and NADPH. Water splits, producing oxygen gas which is released through the stomata on plant leaves. The dark reactions occur in the stroma of the chloroplasts when carbon dioxide is converted to sugar using energy derived from ATP and NADPH.
question
Compare the process of carbon fixation in C3 plants to that of CAM plants.
answer
CAM plants are adapted to arid conditions, while C3 plants are adapted to areas with moderate light and temperatures. CAM plants convert carbon dioxide to acid and store it during the night. The stomata of CAM plants are open at night to conserve water, while C3 plants open stomata during the day.
question
Which of the following types of carbon fixation occurs in most plants? a. C3 b. C4 c. CAM d. none of the above
answer
a. C3
question
The dense fluid in chloroplasts where carbon dioxide is converted to sugar is called the _______. a. thylakoid b. stroma c. grana d. stomata
answer
b. stroma
question
Why are there different types of carbon fixation?
answer
There are different types of carbon fixation, because plants are located in regions with different conditions. Plants that live in arid regions need to conserve water, while plants that live in more moist conditions will not need to conserve water. Plants that live in dry areas, or areas with higher temperatures have adapted modified methods of carbon fixation to help maximize their efficiency.
question
Explain why photosynthesis is vital for life.
answer
Photosynthesis is vital for plant life, because it provides plants with a means to produce energy. Photosynthesis indirectly provides organisms that feed on plants with energy as well. Organisms that feed on plants derive their energy from the plants, which obtained their energy from sunlight through the process of photosynthesis. Photosynthesis also helps maintain atmospheric levels of carbon dioxide and oxygen. Carbon dioxide is taken in by plants during photosynthesis, and oxygen is released.