Bio-energetic – Online MCQs Test – Biology MCAT

1. It is found in all photosynthetic organisms, EXCEPT photosynthetic bacteria:

Chlorophyll – a

Chlorophyll – b

Carotenoids

Bacteriochlorophyll

2. All of the following statements are correct about the light-dependent reactions of photosynthesis EXCEPT

they take place in the grana

when light strikes chlorophyll a. electrons enter an electron transport chain

carotenoids are accessory pigments

PGAL, a 3-carbon sugar, is produced

3. For Krebs cycle enzymes are located in

Chloroplast

Lysosome

Milochondria

Cytosol

4. It is the most abundant and most important photosynthetic pigment in plants:

Carotenes

Chlorophyll a

Xanthophylls

Chlorophyll b

5. Krebs cycle occurs in:

Matrix of mitochondria

Xylem tissues of higher plants

All above

Nucleus of all prokaryotic and eukaryotic cells

6. Six ATPs and 6 NADPH are used respectively in Calvin cycle during the conversion of:

1, 3 phosphoglycerate to glyceraldehyde 3 phosphate

3 phosphoglycerate to glyceraldehyde 3 phosphate

Ribulose biphosphate to 3 phosphoglycerate

3 phosphoglycerate to 1, 3 phosphoglycerate

7. During photosynthesis, light strikes with chlorophyll and its electrons move to higher energy state, After loss of electrons, chlorophyll becomes a very strong

Reducing agent

Catalytic agent

Ionizing agent

Oxidizing agent

8. Number of ATP generated when one molecule of NADH enters in respiratory chain is:

9. ATP molecule is used in all of the following except:

Nerve conduction

Assimilation

Osmosis

Muscular contraction

10. It is common in both cyclic and non-cyclic photophosphorylation

Chemiosmosis

Recycling of electrons

Involvement of PSI

Generation of NADPH

11. Number of ATP generated by one Krebs cycle at substrate level is:

4 ATP

1 ATP

3 ATP

2 ATP

12. Reducing power synthesized in aerobic respiration is converted into assimilatory power through:

Glycolysis

Krebs cycle

Oxidative phosphorylation

Photophosphorylation

13. Photosynthesis consists of two well-defined phases, which are

Oxygenated phase and deoxygenated phase

Chemical phase and photochemical phase

Light phase and dark phase

Biochemical phase and cellular phase

14. Which organelle extracts energy from food molecules and uses it to make ATP?

Golgi

Nucleus apparatus

Mitochondrion

Ribosome

15. The molecular mechanism of oxidative phosphorylation takes place in conjunction with respiratory chain in the:

Inner membrane of mitochondrion

Inner side of thylakoid membrane

Matrix of mitochondrion

Outer membrane of mitochondrion

16. The step/s of glycolysis that consume/s ATP/s, is/are:

2nd step

3rd step

1st step

1st and 3rd steps

17. Glycolysis literally means splitting of:

Sugar

Sucrose

Carbohydrates

Glucose

18. Pyruvate produced during glycolysis proceeds further in presence of oxygen through

Alcoholic fermentation

All of these

Aerobic respiration

Lactic acid fermentation

19. The role of oxygen in aerobic respiration is

To transport CO₂

As the final proton and electron acceptor in the electron transportchain

To transport electrons in glycolysis

Most important in the Krebs cycle

20. The enzyme RuBP helps in the capturing of

Hydrogen

CO₂

O₂

AII of them

Bio-energetic-Medical College Admission Test Preparation Notes