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Facultative anaerobes
1. Cannot use oxygen for growth and are even harmed by it
2. Cannot use oxygen for growth, but tolerate the presence of it
3. Are aerobes which can grow without oxygen
4. Die when given aerobic condition

Which of the following pathway was given by Embden, Meyerhof and Parnas?
1. Glycolysis
2. Acetyl CoA formation step
3. Krebs cycle
4. Pentose phosphate pathway

In EMP pathway, hexose sugar splits into two molecules of triose sugar by the catalytic activity of
1. Phosphofructokinase
2. Aldolase
3. Dehydrogenase
4. Transphosphorylase

Mobile electron carrier in ETS in mitochondrial membrane is
1. Complex I
2. Cyt c
3. Cyt a – a₃
4. Cyt bc₁

Protons for the formation of ATP first pass from
(1) F₀ part
(2) F₁ head piece
(3) Cyt c
(4) Complex II

Intermediate common to proteins and carbohydrate oxidation is
1. Pyruvate
2. Glycerol
3. Oxaloacetate
4. Succinate

Select the statement which is not related to fermentation
1. It accounts for only a partial breakdown of glucose
2. It gives only 2ATP as net for glucose degradation upto pyruvic acid
3. NADH is oxidized slowly as compared to aerobic respiration
4. ETS gives 11ATP for each Krebs cycle

In alcohol fermentation, _____ of energy in glycose in released and not all of it is trapped as high energy bonds of ATP.
1. Less than 1%
2. More than 10%
3. Less than 7%
4. More than 40%

Primary acceptor of TCA cycle is
1. OAA
2. Acetyl CoA
3. Citric acid
4. Pyruvic acid

5C intermediate molecule in TCA cycle is
1. Citric acid
2. Succinyl CoA
3. $\mathrm{\alpha }$-ketoglutaric acid
4. Fumaric acid

Number of total ATP generated in TCA cycle per Acetyl CoA molecule is
1. 10
2. 12
3. 14
4. 24

Substrate level phosphorylation does not occur in which of the following reaction of aerobic respiration?
1. 1, 3-diPGA $\to$ 3-PGA
2. 3-PGA $\to$ 2-PGA
3. PEP Pyruvate
4. Succinyl CoA $\to$ Succinic acid

Which of these statements is incorrect?
1. Enzymes of TCA cycle are present in mitochondrial matrix
2. Glycolysis occurs in cytosol
3. Oxidative phosphorylation takes place in outer mitochondrial membrane
4. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms

What is the role of NAD⁺ in cellular respiration?
1. It functions as an enzyme.
2. It functions as an electron carrier.
3. It is the final electron acceptor for anaerobic respiration.
4. It is a nucleotide source for ATP synthesis.

Which statement is wrong for Krebs' cycle?
1. There are three points in the cycle where NAD⁺ is reduced to NADH + H⁺
2. There is one point in the cycle where FAD⁺ is reduced to FADH₂
3. During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised
4. The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
1. Glucose-6-phosphate
2. Fructose 1,6-bisphosphate
3. Pyruvic acid
4. Acetyl CoA

The energy releasing metabolic process in which substrate is oxidised without an external electron acceptor is called
1. Photorespiration
2. Glycolysis
3. Fermentation
4. Aerobic respiration

Aerobic respiratory pathway is appropriately termed:
1. Parabolic
2. Amphibolic
3. Anabolic
4. Catabolic

The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
1. There is a change in the permeability of the inner mitochondiral membrane toward adenosine diphosphate (ADP)
2. High energy bonds are formed in mitochondrial proteins
3. ADP is pumped out of the matrix into the intermembrane space
4. A proton gradient forms across the inner membrane

How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO₂ and H₂O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal ?
1. Two
2. Thirty
3. Fifty seven
4. One

During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP?
1. Conversion of pyruvic acid to acetyl Co-A
2. Electron transport chain
3. Glycolysis
4. Krebs cycle

Glycolysis
1. Takes place in the mitochondria
2. Produces no ATP
3. Has no connection with electron transport chain
4. Reduces two molecules of NAD+ for every glucose molecule processed

The end products of fermentation are
1. O₂ and C₂H₅OH
2. CO₂ and acetaldehyde
3. CO₂ and O₂
4. CO₂ and C₂H₅OH

In Krebs cycle, the FAD participates as electron acceptor during the conversion of
1. Fumaric acid to malic acid
2. Succinic acid to fumaric acid
3. Succinyl CoA to succinic acid
4. $\mathrm{\alpha }$-ketoglutarate to succinyl CoA

The correct sequence of electron acceptor in ATP synthesis is
(1) Cyt. b, c, a₃, a
(2) Cyt. c, b, a, a₃
(3) Cyt. a₃, a, b, c
(4) Cyt. b, c, a, a₃