Bio-energetic – Online MCQs Test – Biology MCAT

1. The intermediate compound common aerobic and anaerobic respiration is:

Lactic acid

Citric acid

Pyruvic acid

Fructose

2. Krebs cycle occurs in:

All above

Nucleus of all prokaryotic and eukaryotic cells

Matrix of mitochondria

Xylem tissues of higher plants

3. The stroma of chloroplast contains most of the enzymes to produce:

Nucleic acids

ATP

Carbon dioxide

Carbohydrates

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

Bacteriochlorophyll

Carotenoids

Chlorophyll – b

Chlorophyll – a

5. The most abundant protein on earth is:

Ribose

Cellulose

Ribsco

RuBP

6. The oxygen that plants give of

comes from the light-dependent reactions of photosynthesis

comes from the light-independent reaction of photosynthesis

comes from carbon dioxide that plants absorb

is a by-product of respiration

7. Each NADH molecule carrying protons to the electron transport chain can produce molecules of ATP

8. The role of oxygen in aerobic respiration is

As the final proton and electron acceptor in the electron transportchain

Most important in the Krebs cycle

To transport electrons in glycolysis

To transport CO₂

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

Krebs cycle

Photophosphorylation

Glycolysis

Oxidative phosphorylation

10. One Calvin cycle uses how many CO₂ molecules:

11. The electron transport chain is located in the

Cytoplasm

Inner matrix

Cristae of the mitochondria

Outer compartment of mitochondria

12. How many CO₂ molecules are released when 1 molecule of glucose is completely in aerobic respiration?

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

Chlorophyll a

Xanthophylls

Carotenes

Chlorophyll b

14. It is energy yielding step of glycolysis:

Fructose 6-phosphate into fructose 1 ,6-bisphosphate

1 ,3-bisphosphoglycertate into 3-phosphoglycerate

Glucose into glucose 6-phosphate

3-phosphoglycerate into 3-phosphglycerate

15. __________ generates more ATP as compared to ___________

Chemiosmosis, phosphorylation

Substrate ATP phosphorylation, chemiosmosis

Chemiosmosis, substrate ATP phosphorylation

Oxidative ATP phosphorylation, chemiosmosis

16. All life on this planet Earth is powered directly or indirectly by:

Solar energy

Energy of moon

Heat energy

Metabolic energy

17. All of the following are correct about ATP synthase EXCEPT

it is an important component of glycolysis

it is a molecule located within the cristae membrane

it spins like a turbine

it binds a phosphate to a molecule of ADP

18. The total energy yield from glucose metabolism is:

24 ATPs

36 ATPs

4 ATPs

36 to 38 ATPs

19. The so called “‘high energy” bonds of ATP are represented by:

Second phosphate

First phosphate

Third phosphate

Second and third phosphate

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

Lactic acid fermentation

All of these

Alcoholic fermentation

Aerobic respiration

Bio-energetic-Medical College Admission Test Preparation Notes