Bio-energetic – Online MCQs Test – Biology MCAT

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

Photophosphorylation

Oxidative phosphorylation

Krebs cycle

Glycolysis

2. In respiration. ATP synthesis is called:

All of these

Z-scheme

Cellular phosphorylation

Oxidative phosphorylation

3. The initial role of chlorophyll in photosynthesis is to

absorb light energy

Fix carbon dioxide

synthesize carbon

Synthesize sugar

4. All of the following are correct about cell respiration EXCEPT

All plant and animal cells carry out respiration all the time

It consists of glycolysis, Kreb’s cycle, and the electron transport chair

Oxygen molecules are pumped across the cristae membrane to the outer compartment

It is an oxidative process

5. Chlorophylls absorb mostly violet-blue wavelengths ________ and red wavelength _______ respectively:

670 – 700nm, 500 – 600nm

390 – 430nm, 670 – 700nm

390 – 430nm, 500 – 600nm

670 – 700nm, 390 – 430nm

6. The output of a single Calvin cycle is a:

Lipid

Vitamin

Sugar

Protein

7. In chloroplasts, chlorophyll is present in the

Strom

Inner membrane

Outer membrane

Thylakoids

8. When equal intensities of light are given then maximum photosynthesis occurs in:

Blue light

Violet light

Red light

Orange light

9. Correct sequence of cytochromes involved in respiratory chain is.

b, c, a, a3

b, c, a3, a

a a3, b, c

a3, a, b, c

10. From recent studies, it has been found that pre-existing plastids arise from

The nucleus

The cell wall

Bodies called pro-plaslids

The vacuole

11. Which of the following is the most important thing that occurs during cell respiration?

Oxygen is released.

A proton gradient is created.

Protons and electrons combine with oxygen to form water.

CO₂ is produced during the Krebs cycle.

12. Synthesis of ATP in the presence of oxygen is called:

Chemiosmosis

Photophosphorylation

Oxidative phosphorylation

Aerobic respiration

13. Glycolysis ________________

Involves an electron transport chain

Requires oxygen

Is the breakdown of glucose to produce pyruvic acid

Produces water

14. Carotenoids absorb all colors of light EXCEPT

green

blue

yellow

red

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

Nucleus apparatus

Mitochondrion

Golgi

Ribosome

16. For Krebs cycle enzymes are located in

Cytosol

Milochondria

Lysosome

Chloroplast

17. All of the following statements about photolysis are correct EXCEPT

it occurs during the light-independent reaction

it provides hydrogen for carbon fixation

it releases oxygen

it supplies electrons to chlorophyll a

18. The enzyme RuBP helps in the capturing of

Hydrogen

O₂

AII of them

CO₂

19. All of the following are components of antenna complex of photosystem in olants except

Carotenoids

Chlorophyll a

Chlorophyll b

Electron transport chain

20. Choose the pair that is correctly matched.

Electron transport chain-outer compartment of mitochondria

Kreb’s cycle-cytoplasm

Electron transport chain-cristae membrane

Glycolysis-cristae membrane

Bio-energetic-Medical College Admission Test Preparation Notes