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

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Question 1 of 18

Biology

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

Light Reaction

Photolysis

Bioenergetics

Dark Reaction

Question 1 of 18

Question 2 of 18

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

Glycolysis

Aerobic Respiration

Anaerobic Respiration

Fermentation

Question 2 of 18

Question 3 of 18

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

Stroma

Mesophyll

Starch

Chlorophyll

Question 3 of 18

Question 4 of 18

4. Chlorophyll pigment absorbs maximum light in wavelengths of;

Green and blue

Green and red

Green only

Red and blue

Question 4 of 18

Question 5 of 18

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

Catabolism

Starch

Anabolism

Alcoholic Fermentation

Question 5 of 18

Question 6 of 18

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

AMP

ATP

FAB

ADP

Question 6 of 18

Question 7 of 18

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

Respiration

None of these

Both

Photosynthesis

Question 7 of 18

Question 8 of 18

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

Carry out anaerobic respiration and so accumulate more CO₂

Carry out anaerobic respiration and so accumulate lactic acid

Carry out aerobic respiration at faster rate and so are tried

Carry out aerobic respiration and so accumulate Lactic acid

Question 8 of 18

Question 9 of 18

9. 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 9 of 18

Question 10 of 18

10. Oxygen takes part in aerobic respiration in;

Link step between glycolysis and Krebs cycle

Electron transport chain

Glycolysis

Krebs cycle

Question 10 of 18

Question 11 of 18

11. Which of these can enter into Krebs cycle?

Glucose

Citric acid

Pyruvic acid

Acetyl Co-A

Question 11 of 18

Question 12 of 18

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

Calvin Cycle

Krebs cycle

Glycolysis

Electron Transport Chain

Question 12 of 18

Question 13 of 18

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

03

01

06

02

Question 13 of 18

Question 14 of 18

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

Electron transport chain

Glycolysis

All of these

Krebs cycle

Question 14 of 18

Question 15 of 18

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

Cytoplasm

Stroma

Thylakoids

Plasma membrane

Question 15 of 18

Question 16 of 18

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

AMP

FAB

ATP

ADP

Question 16 of 18

Question 17 of 18

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

Catabolism

Anabolism

Starch

Glycolysis

Question 17 of 18

Question 18 of 18

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

P-P bonds

C-O bonds

C-N bonds

C-H bonds

Question 18 of 18

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