Bio-energetic – Online MCQs Test – Biology MCAT

1. Final acceptor of electrons in respiratory chain is:

Oxygen

Cytochrome a3

Co-enzyme Q

ATP

2. The breakdown of glucose into pyruvic acid occurs during the process of

the electron transport chain

lactic acid fermentation

the Krebs cycle

glycolysis

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

Oxygenated phase and deoxygenated phase

Biochemical phase and cellular phase

Light phase and dark phase

Chemical phase and photochemical phase

4. The enzyme RuBP helps in the capturing of

O₂

Hydrogen

AII of them

CO₂

5. When oxygen combines with electrons and hydrogen ions at the end of the electron transport chain_________ is produced.

Metabolic water

Protonated water

Anabolic water

Oxygenated water

6. Krebs cycle occurs in:

Xylem tissues of higher plants

All above

Nucleus of all prokaryotic and eukaryotic cells

Matrix of mitochondria

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

A proton gradient is created.

CO₂ is produced during the Krebs cycle.

Protons and electrons combine with oxygen to form water.

Oxygen is released.

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

it provides hydrogen for carbon fixation

it occurs during the light-independent reaction

it supplies electrons to chlorophyll a

it releases oxygen

9. Anaerobic respiration occurs in the absence of oxygen like;

Oxidation

Combustion

All these

Fermentation

10. Pumping of H⁺ across thylakoid membranes during chemiosmosis requires energy that comes from:

NADPH

Potential energy stored in H⁺

ATP

ETC

11. A process of ATP generation in chloroplasts and mitochondria refers to:

Kreb’s cycle

Glycolysis

Chemiosmosis

Ferrnentation

12. The electron transport chain is located in the

Cytoplasm

Outer compartment of mitochondria

Cristae of the mitochondria

Inner matrix

13. In which processes, ATP is used as a raw material?

In activation of t-RNA

All of these

In reduction of carbon dioxide during dark reaction of photosynthesis

In replication and transcription of RNA

14. NAUP and CO₂ both are reduced during photosynthesis by Hydrogen. Their reduction occurs respectively in:

Dark reaction and light reaction

Light reaction and dark reaction

Light reactions only

Dark reactions only

15. What happens to water in photosynthesis?

Reduction of glucose

Oxidation of carbon dioxide

Oxidation of water

Reduction of water

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

it spins like a turbine

it is a molecule located within the cristae membrane

it binds a phosphate to a molecule of ADP

it is an important component of glycolysis

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

Ionizing agent

Oxidizing agent

Catalytic agent

Reducing agent

18. During photosynthesis. Light energy is captured by

Reaction centre

Thylakoid membranes

Antenna complex

Strom

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

670 – 700nm, 500 – 600nm

390 – 430nm, 500 – 600nm

390 – 430nm, 670 – 700nm

670 – 700nm, 390 – 430nm

20. In respiration. ATP synthesis is called:

Oxidative phosphorylation

Cellular phosphorylation

All of these

Z-scheme

Bio-energetic-Medical College Admission Test Preparation Notes