Punjab 9th Class Biology Chapter 7 Bioenergetics Punjab 9th Class

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Question 1 of 18

Biology

1. When a plant was kept in darkness for many days its leaves turned yellow. Why?

Leaves could not get oxygen and so there was no photosynthesis

Leaves could not get light and so there was no respiration

Leaves could not get oxygen and so there was no respiration

Leaves could not get light and so there was no photosynthesis

Question 1 of 18

Question 2 of 18

2. How many molecules of CO₂ are produced when Krebs cycle operates once?

06

01

03

02

Question 2 of 18

Question 3 of 18

3. When we work hard we suffer from muscle fatigue because muscle cells;

Carry out aerobic respiration at faster rate and so are tried

Carry out anaerobic respiration and so accumulate more CO₂

Carry out anaerobic respiration and so accumulate lactic acid

Carry out aerobic respiration and so accumulate Lactic acid

Question 3 of 18

Question 4 of 18

4. The incomplete oxidation of glucose in the absence of oxygen:

Anaerobic Respiration

Glycolysis

Fermentation

Aerobic Respiration

Question 4 of 18

Question 5 of 18

5. In which of the following metabolic processes, oxidation as well as reduction of molecules occur?

Both

Photosynthesis

None of these

Respiration

Question 5 of 18

Question 6 of 18

6. Which of these can enter into Krebs cycle?

Glucose

Pyruvic acid

Acetyl Co-A

Citric acid

Question 6 of 18

Question 7 of 18

7. Adenosime Monophosphate; Formed of an Adenine, a Ribose and one phosphate group:

ATP

FAB

ADP

AMP

Question 7 of 18

Question 8 of 18

8. In which of the following steps of respiration, CO₂ is produced?

Electron transport chain

All of these

Krebs cycle

Glycolysis

Question 8 of 18

Question 9 of 18

9. The study of energy relationships and energy transformations (conversions) in living organisms:

Dark Reaction

Photolysis

Light Reaction

Bioenergetics

Question 9 of 18

Question 10 of 18

10. The anaerobic respiration in which the pyruvic acid is further broken into carbon dioxide and ethyl alcohol?

Alcoholic Fermentation

Starch

Anabolism

Catabolism

Question 10 of 18

Question 11 of 18

11. Oxygen takes part in aerobic respiration in;

Glycolysis

Link step between glycolysis and Krebs cycle

Krebs cycle

Electron transport chain

Question 11 of 18

Question 12 of 18

12. Adenosine Triphosphate; The energy currency for cells; Formed of Adenine, Ribose and phosphate group:

ATP

ADP

AMP

FAB

Question 12 of 18

Question 13 of 18

13. The Dark Reaction; The cyclic reactions in which carbon dioxide is fixed to from carbohydrates, using the energy of ATP and Hydrogen of NADP:

Glycolysis

Calvin Cycle

Krebs cycle

Electron Transport Chain

Question 13 of 18

Question 14 of 18

14. In which component of the leaf cells, chlorophyll is present?

Thylakoids

Stroma

Cytoplasm

Plasma membrane

Question 14 of 18

Question 15 of 18

15. From which bonds of ATP molecule energy is taken?

C-H bonds

C-O bonds

P-P bonds

C-N bonds

Question 15 of 18

Question 16 of 18

16. The type of metabolism in which smaller molecules are joined to form larger and complex molecules:

Glycolysis

Anabolism

Catabolism

Starch

Question 16 of 18

Question 17 of 18

17. The green pigments found in the chloroplasts of photosynthetic eukaryotes and in the cytoplasm of photosynthetic prokaryotes:

Chlorophyll

Starch

Stroma

Mesophyll

Question 17 of 18

Question 18 of 18

18. Chlorophyll pigment absorbs maximum light in wavelengths of;

Red and blue

Green only

Green and blue

Green and red

Question 18 of 18

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