laboursonline – MCQs, Mock Tests | General Science Basic Science botany Plant Physiology Respiration

Reactions in which the breakdown of macromolecules to their simple precursors is called

1. Anabolism
2. Metabolism
3. Biosynthesis
4. Catabolism

✅ Correct Answer: 4

Glycolysis is also known as

1. Calvin cycle
2. Citric acid cycle
3. TCA cycle
4. EMP pathway

✅ Correct Answer: 4

The overall reaction of glucose oxidation is

1. C?H??O? + 6O? ? 6CO?+6H?O+2900 kJ energy
2. C?H??O? + 6O? ? 4CO?+8H?O+2900 kJ energy
3. C?H??O? + 4O? ? 6CO?+6H?O+2900 kJ energy
4. C?H??O? + 6O? ? 6CO?+4H?O+2900 kJ energy

✅ Correct Answer: 5

In most organisms, oxidation needs the partipation of

1. Oxygen
2. Carboindioxide
3. Molecular Oxygen
4. Hydrogen

✅ Correct Answer: 3

The most common respiratory substrate that involves in oxidation is

1. Protein
2. Lipid
3. Vitamin
4. Glucose

✅ Correct Answer: 4

A large amount of free energy is liberated when high energy bonds of ATP are broken by

1. Glycolysis
2. Hydrolysis
3. Electrolysis
4. Photolysis

✅ Correct Answer: 2

The scientist is not involved in glycolysis

1. Calvin
2. Embden
3. Meyerhoff
4. Parnas

✅ Correct Answer: 1

Energy released during fermentation is

1. High
2. very high
3. Low
4. very low

✅ Correct Answer: 4

The energy currency of the cell is

1. ADP
2. NADP
3. ATP
4. FADH?

✅ Correct Answer: 3

The energy needed for living organisms is obtained by the oxidation of complex organic compounds by

1. Respiration
2. Transpiration
3. Anabolism
4. Biosynthesis

✅ Correct Answer: 2

The step common to both aerobic and anaerobic respiration is

1. Glycolysis
2. Kreb�s cycle
3. Fermentation
4. Photolysis

✅ Correct Answer: 1

The mitochondria plays a dominant role in

1. Reproduction
2. Synthesis of Carbohydrates
3. Digestion of proteins
4. Aerobic Respiration

✅ Correct Answer: 4

The special carrier of free energy is

1. ADP
2. FAD
3. NAD
4. ATP

✅ Correct Answer: 4

Aerobic respiration occurs in

1. Nucleus
2. Ribosome
3. Cytoplasm
4. Mitochodria

✅ Correct Answer: 4

Anaerobic respiration is otherwise called as

1. oxidation
2. fermentation
3. glycolysis
4. external respiration

✅ Correct Answer: 2

Number of stages involved in the oxidation of glucose molecule is

1. Two
2. Three
3. Four
4. Six

✅ Correct Answer: 3

Respiration falls under

1. Anabolism
2. Biosynthesis
3. Catabolism
4. Metabolism

✅ Correct Answer: 3

Aerobic respiration is carried out by

1. Plants
2. Animals
3. Yeast
4. Algal

✅ Correct Answer: 3

Reactions involved in the synthesis of organic compounds from simple precursors is known as

1. Anabolism
2. Catabolism
3. Degradative reactions
4. Metabolism

✅ Correct Answer: 1

This is not liberated during the oxidation of carbohydrate

1. Energy
2. Carboindioxide
3. Hydrogen
4. Water

✅ Correct Answer: 3

The potential energy is transformed into kinetic energy by the plant by

1. Transpiration
2. Respiration
3. Photosynthesis
4. Reproduction

✅ Correct Answer: 2

Conversion of pyruvic acid into either ethyl alcohol or lactic acid is called

1. Fermentation
2. Transpiration
3. Aerobic respiration
4. Oxidative phosphorylation

✅ Correct Answer: 1

Glycolysis occurs in

1. Mitochondria
2. Cytoplasm
3. Protoplasts
4. Chloroplasts

✅ Correct Answer: 2

The Co-enzymes which act as hydrogen carriers from respiratory substrate to electron transport chain are

1. ADP
2. FAD
3. NAD
4. FAD? and NAD?

✅ Correct Answer: 4

Electron transport chain is also known as

1. Photo oxidation
2. Photophosphorylation
3. Oxidative phosphorylation
4. Cyclic Phosphorylation

✅ Correct Answer: 3

.Biological Oxidation in which energy is extracted from organic compounds is

1. Transpiration
2. Respiration
3. Growth
4. Growth

✅ Correct Answer: 2

.Number of steps involved in glycolysis

1. Two
2. Three
3. Four
4. Ten

✅ Correct Answer: 4

The participation of molecular oxygen is required in

1. Anaerobic respiration
2. Fermentation
3. Aerobic respiration
4. Transpiration

✅ Correct Answer: 3

The universal process is all organisms is

1. Kreb�s cycle
2. Oxidation of pyruvic acid
3. Glycolysis
4. Transpiration

✅ Correct Answer: 3

Malate becomes oxaloacetate by the activity of the enzyme

1. Fumarase
2. Synthetase
3. Dehydrogenase
4. Aconitase

✅ Correct Answer: 3

Number of ATP used in preparatory stage of glycolysis is

1. 2
2. 4
3. 6
4. 10

✅ Correct Answer: 1

The process of conversion of glucose into pyruvic acid is

1. Cyclic photophosphorylation
2. Calvin cycle
3. Glycolysis
4. Non- photophosphorylation

✅ Correct Answer: 3

At the end of glycolysis, each glucose molecule is formed into

1. One molecule of pyruvic acid
2. Two molecule of Pyruvic acid
3. Three molecule of pyruvic acid
4. Four molecule of pyruvic acid

✅ Correct Answer: 2

2-Phosphoglyceric acid is catalysed to form phosphoenol pyruvate by the enzyme

1. Aldolase
2. Enolase
3. Phosphoglyceric mutase
4. Phosphofrutokinase

✅ Correct Answer: 2

Glucose is phosphorylated to glucose 6-phosphate in the presence of the enzymes

1. Enolase
2. Aldolase
3. Phosphoglucoisomerase
4. Hexokinase

✅ Correct Answer: 4

The power house of the cell is

1. Cytoplasm
2. Chlroplasts
3. Mitochondria
4. Nucleus

✅ Correct Answer: 3

Citric is converted to cis-aconitic acid and this reaction is catalysed by

1. Dehydrogenase
2. Fumarase
3. Synthetase
4. Aconitase

✅ Correct Answer: 4

This is not a Kreb s cycle

1. Citric acid cycle
2. Calvin cycle
3. Tricarboxylic acid cycle
4. TCA cycle

✅ Correct Answer: 2

Oxidation of pyruvic acid occurs only under this condition

1. Fermentation
2. Anaerobic
3. Aerobic
4. Both aerobic and anaerobic

✅ Correct Answer: 3

Number of NADPH? formed at the end of glycolysis is

1. 2
2. 4
3. 6
4. 10

✅ Correct Answer: 1

The organelle which plays a dominant role in respiration is

1. Ribosome
2. Endoplasmic reticulum
3. Chloroplast
4. Mitochondria

✅ Correct Answer: 4

Fumaric acid is catalysed into malic acid by

1. Dehydrogenase
2. Fumarase
3. Synthetase
4. Aconitase

✅ Correct Answer: 2

Phosphoenol Pyruvate is converted into Pyruvic acid by

1. Enolase
2. Aldolase
3. Pyruvic Kinase
4. Phosphoglyceric mutase

✅ Correct Answer: 3

Flavoproteins and Cytochromes are arranged in the inner membranes of

1. Thylakoids
2. Plasma membrane
3. Ribosomes
4. Mitochondria

✅ Correct Answer: 4

1,3-bisphosphoglyceric acid is converted to 3-phosphoglyceric acid by the enzyme

1. Phosphofructokinase
2. Phosphoglucoisomerase
3. Phosphoglyceric Kinase
4. Phosphoglyceric mutare

✅ Correct Answer: 3

The total number of ATP molecules formed from one glucose molecule after oxidation is

1. 4
2. 6
3. 18
4. 38

✅ Correct Answer: 4

The number of ATP molecules generated by one FADH? is

1. 2
2. 3
3. 4
4. 8

✅ Correct Answer: 1

Oxaloacetate reacts with acetyl CoA to form citric acid in the presence of an enzyme

1. Aconitase
2. Synthetase
3. Dehydrogenase
4. Fumarase

✅ Correct Answer: 2

Acetly CoA is

1. 2C compound
2. 3C compound
3. 4C compound
4. 6C compound

✅ Correct Answer: 1

.Succinic acid is converted to fumaric acid by

1. Dehydrogenase
2. Fumarase
3. Synthetase
4. Aconitase

✅ Correct Answer: 1

Pyruvic acid is oxidized to acetly co-enzyme A in the

1. Cytoplasm
2. Nucleus
3. Mitochondria
4. Ribosome

✅ Correct Answer: 3

Each NADPH? molecule generates

1. 2 ATP molecules
2. 3 ATP molecules
3. 4 ATP molecules
4. 6 ATP molecules

✅ Correct Answer: 2

Glucose 6-phosphate is converted to fructose 6-phosphate by

1. Hexokinase
2. Phosphogluco isomerase
3. Phosphofructokinase
4. Aldolase

✅ Correct Answer: 2

Total number of ATP formed in glycolysis are

1. Two
2. Three
3. Four
4. Thirty eight

✅ Correct Answer: 3

Fructose 1 6-phosphate is cleaved into two 3-carbon compounds in the presence of an enzyme

1. Hexokinase
2. Aldolase
3. Phosphofructokinase
4. Phosphoglucoisomerase

✅ Correct Answer: 2

Co-enzymes

1. always accompany enzymes
2. function only by addition of small molecules
3. function only in the presence of enzymes
4. are used to synthesize enzymes

✅ Correct Answer: 3

Net gain of ATP in glycolysis is

1. 10
2. 6
3. 4
4. 2

✅ Correct Answer: 4

3-Phosphoglyceric acid is converted to 2-Phosphoglyceric acid by the enzyme

1. Phosphoglyceric mutase
2. Phosphofructokinase
3. Phosphoglyceric Kinase
4. Enolase

✅ Correct Answer: 1

The overall net gain of FADPH? in oxidation of a glucose molecule is

1. 2
2. 4
3. 6
4. 10

✅ Correct Answer: 1

Ganong s respiroscope experiment is to demonstrate that

1. O? is evolved during photosynthesis
2. CO? is necessary for photosynthesis
3. CO? is released during respiration
4. Light is necessary for photosynthesis

✅ Correct Answer: 3

Solution used in the respiroscope experiment is

1. Iodine
2. Sucrose
3. Mercury
4. Caustic potash

✅ Correct Answer: 4