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

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Question 1 of 10

Biology

1. Chlorophyll is soluble in

Water and organic solvent

Water

Not in any solvent

Organic solvent

Question 1 of 10

Question 2 of 10

2. 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

A

B

D

Question 2 of 10

Question 3 of 10

3. Photo respiration takes place only in

All cells of the plant

Root

Mitochondria

Green parts of the plant

Question 3 of 10

Question 4 of 10

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

ATP, PGA and NADH₂

ATP and NADP

ATP, NADPH₂ and oxygen

ATP, PGA and oxygen

Question 4 of 10

Question 5 of 10

5. ATP synthesis during light reactions is

Substrate phosphorylation

Photophosphoryation

Photolysis

Oxidative

Question 5 of 10

Question 6 of 10

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

RuBP + CO₂ + PEP

RuBP + CO₂

CO₂ only

RuBP only

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 broken down into oxygen and a free radical of hydrogen

Is used to produce adenosine triphosphate from adenosine diphosphate

Reduces carbon dioxide to sugar

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

Question 7 of 10

Question 8 of 10

8. 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?

PGA

RuBP

Glucose

Starch

Question 8 of 10

Question 9 of 10

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

PGA

RuBP

Oxaloacetate

PGAL

Question 9 of 10

Question 10 of 10

10. In C₄ plants, fixation of CO₂ occurs in

Phloem tissue

Palisade tissue

Cortex of stem

Spongy mesophyll and bundle of sheath

Question 10 of 10

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