Biology Chapter 11 Bio Energetic Mcqs Test Online Punjab Class 11th

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Question 1 of 10

Biology

1. ATP synthesis during light reactions is

Photophosphoryation

Substrate phosphorylation

Photolysis

Oxidative

Question 1 of 10

Question 2 of 10

2. In C₄ plants, fixation of CO₂ occurs in

Palisade tissue

Spongy mesophyll and bundle of sheath

Cortex of stem

Phloem tissue

Question 2 of 10

Question 3 of 10

3. Chlorophyll is soluble in

Water and organic solvent

Not in any solvent

Organic solvent

Water

Question 3 of 10

Question 4 of 10

4. What are the products of the light reactions in photosynthesis?

ATP, PGA and NADH₂

ATP, PGA and oxygen

ATP, NADPH₂ and oxygen

ATP and NADP

Question 4 of 10

Question 5 of 10

5. Photo respiration takes place only in

Green parts of the plant

Root

All cells of the plant

Mitochondria

Question 5 of 10

Question 6 of 10

6. Carbon dioxide labeled with ¹⁴C has been used to identify the intermediate compounds in the Calvin cycle, the light-independent stage in photosynthesis. Which compound would be the first to contain the ¹⁴C?

Starch

Glucose

RuBP

PGA

Question 6 of 10

Question 7 of 10

7. During the light dependent stage of photosynthesis, the photo activated pigment removes an electron from the hydroxylation derived from the water molecule. The fate of the free hydroxyl radical is that it:

Is used to raise the activation level of chlorophyll by donating positive charge

Is broken down into oxygen and a free radical of hydrogen

Is used to produce adenosine triphosphate from adenosine diphosphate

Reduces carbon dioxide to sugar

Question 7 of 10

Question 8 of 10

8. In C₃ plants first stable product of photosynthesis during dark reaction is:

PGA

RuBP

Oxaloacetate

PGAL

Question 8 of 10

Question 9 of 10

9. Removal of the source of carbon dioxide from photosynthesizing chloroplasts results in rapid changes in the concentration of certain chemicals.

Which one of the following represents the correct combination of concentration changes?

	ATP	Ribulose bishposphate	Phosphoglyceric acid (PGA)
A	Decreases	Decreases	Increases
B	Decreases	Increases	No change
C	Increases	Increases	Decreases
D	Increases	No change	Increases

C

D

A

B

Question 9 of 10

Question 10 of 10

10. During dark reactions the three carbon atoms of 3-PGA are derived from

RuBP + CO₂

CO₂ only

RuBP + CO₂ + PEP

RuBP only

Question 10 of 10

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