In Calvin cycle, CO₂ reacts with RuBP to produce ?

B. 6-Carbon unstable intermediate

Everyday Science · Botany (Plant Biology) · page 16 of 19

Photosynthesis & Plant MCQs with Answers

Includes 17 past paper MCQs (marked).

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Photosynthesis & Plant Nutrition MCQs (151–160)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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151.
Which organelle is responsible for photosynthesis in plant cells?
Correct Answer: B. Chloroplast
One-liner
The organelle responsible for photosynthesis in plant cells is the chloroplast.
152.
Which nutrient is maximally used for raising field crops?
Correct Answer: C. Nitrogen
One-liner
Nitrogen is the nutrient maximally used for raising field crops because it is a key component of chlorophyll, proteins, and nucleic acids essential for vegetative growth.
153.
Each mesophyll cell of leaf has chloroplasts about _?
Correct Answer: B. 10 – 20
One-liner
Each mesophyll cell of a leaf contains about 10 – 20 chloroplasts.
154.
Carnivorous plants have evolved mechanisms for trapping and digesting small animals. The product of this digestion is used to supplement the plant's supply of:
Correct Answer: A. Nitrates
One-liner
Carnivorous plants digest small animals to supplement their supply of nitrates, which are essential for protein synthesis and growth in nitrogen-poor soils.
155.
Which of the following factor is not necessary for photosynthesis?
Correct Answer: D. Oxygen
One-liner
Oxygen is not necessary for photosynthesis; it is actually a by-product of the process.
156.
In Calvin cycle, CO₂ reacts with RuBP to produce ?
Correct Answer: B. 6-Carbon unstable intermediate
One-liner
In the Calvin cycle, CO₂ reacts with RuBP to produce a 6-carbon unstable intermediate, which immediately splits into two molecules of 3-PGA.
157.
Past Paper MCQ
A plant that cannot prepare its own food is called?
Correct Answer: B. Heterotroph
One-liner
A plant that cannot prepare its own food is called a heterotroph.
158.
The accessory pigment used by cyanobacteria is?
Correct Answer: C. Phycobilins
One-liner
The accessory pigment used by cyanobacteria is phycobilins.
159.
Plants uptake their nutrients from _?
Correct Answer: D. All of these
One-liner
Plants uptake their nutrients from All of these (soil, water, and air).
160.
The macronutrient which regulates opening and closing of stomata and reduces water loss from the leaves?
Correct Answer: C. Potassium
One-liner
The macronutrient that regulates opening and closing of stomata and reduces water loss from leaves is Potassium.

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Photosynthesis & Plant MCQs with Answers

Photosynthesis & Plant Nutrition MCQs (151–160)

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