MERIT YARD

[Respiration in Plants - VVI MCQs - MERIT YARD]

Question 1 / 40Which of the following is also known as EMP pathway?

A) Glycolysis

B) Krebs cycle

C) ETS

D) HMP Shunt

Question 2 / 40Glycolysis occurs in which part of the cell?

A) Mitochondria

B) Cytoplasm

C) Chloroplast

D) Nucleus

Question 3 / 40The end product of glycolysis is:

A) Citric acid

B) Acetyl CoA

C) Pyruvic acid

D) Glucose-6-phosphate

Question 4 / 40Krebs cycle (TCA cycle) occurs in:

A) Inner mitochondrial membrane

B) Mitochondrial matrix

C) Cytoplasm

D) Peroxisomes

Question 5 / 40Link reaction connects Glycolysis with Krebs cycle by producing:

A) Acetyl CoA

B) Pyruvate

C) Citric acid

D) ATP

Question 6 / 40The number of ATP molecules produced by one molecule of NADH in ETS is:

A) 1

B) 2

C) 3

D) 4

Question 7 / 40One molecule of FADH2 on oxidation in ETS yields how many ATP?

A) 1

B) 2

C) 3

D) 4

Question 8 / 40The first stable product of Krebs cycle is:

A) Oxaloacetic acid

B) Citric acid

C) Malic acid

D) Succinic acid

Question 9 / 40The respiratory quotient (RQ) of fats is:

A) 1.0

B) 0.7

C) 0.9

D) More than 1

Question 10 / 40Terminal electron acceptor in aerobic respiration is:

A) CO2

B) Oxygen

C) ATP

D) Water

Question 11 / 40F1 particles (Oxysomes) are located in:

A) Inner mitochondrial membrane

B) Outer mitochondrial membrane

C) Chloroplast

D) Golgi body

Question 12 / 40Net gain of ATP from one molecule of glucose in Glycolysis is:

A) 4 ATP

B) 2 ATP

C) 8 ATP

D) 38 ATP

Question 13 / 40RQ value of Carbohydrates is:

A) 0.7

B) 0.9

C) 1.0

D) Zero

Question 14 / 40Which of the following is a 5-carbon compound in Krebs cycle?

A) Citric acid

B) alpha-ketoglutaric acid

C) Succinic acid

D) Fumaric acid

Question 15 / 40In anaerobic respiration (fermentation), the end products in yeast are:

A) Lactic acid + ATP

B) Ethanol + CO2

C) Methanol + CO2

D) CO2 + Water

Question 16 / 40Cytochrome c oxidase (Complex IV) contains which metal ions?

A) Mg and Fe

B) Cu and Fe

C) Ca and Mg

D) Zn and Cu

Question 17 / 40Formation of ATP from ADP by ETS is called:

A) Photophosphorylation

B) Oxidative phosphorylation

C) Substrate level phosphorylation

D) Carboxylation

Question 18 / 40Total number of CO2 molecules released during one Krebs cycle is:

A) 1

B) 2

C) 3

D) 6

Question 19 / 40Which of the following is the mobile electron carrier in ETS?

A) Cytochrome c

B) Cytochrome a

C) ATP synthase

D) Ubiquinone only

Question 20 / 40The number of ATP molecules produced by complete aerobic oxidation of 1 glucose:

A) 2

B) 8

C) 12

D) 36 or 38

Question 21 / 40Enzyme Enolase requires which activator?

A) Mg2+

B) Fe2+

C) Mn2+

D) Cu2+

Question 22 / 40Substrate level phosphorylation in Krebs cycle produces:

A) GTP

B) ATP

C) NADP

D) FAD

Question 23 / 40Which acid is the entry point of Krebs cycle?

A) Citric acid

B) Oxaloacetic acid

C) Pyruvic acid

D) Acetyl CoA

Question 24 / 40Anaerobic respiration in muscle cells produces:

A) Lactic acid

B) Ethanol

C) Acetic acid

D) Citric acid

Question 25 / 40Respiratory Quotient (RQ) is defined as:

A) Vol of CO2 evolved / Vol of O2 consumed

B) Vol of O2 consumed / Vol of CO2 evolved

C) Glucose / ATP

D) Total ATP / Net ATP

Question 26 / 40Complex V of ETS is:

A) NADH dehydrogenase

B) Succinate dehydrogenase

C) ATP synthase

D) Cytochrome bc1

Question 27 / 40How many molecules of CO2 are produced in Glycolysis?

A) Zero

B) 1

C) 2

D) 4

Question 28 / 40The number of times decarboxylation occurs in Krebs cycle is:

A) 1

B) 2

C) 3

D) 4

Question 29 / 40Which of the following is a redox carrier?

A) Cytochromes

B) Sugars

C) Amino acids

D) Fats

Question 30 / 40The RQ of organic acids is usually:

A) Less than 1

B) More than 1

C) Exactly 1

D) Zero

Question 31 / 40Respiratory pathway is better called as:

A) Catabolic

B) Anabolic

C) Amphibolic

D) Metabolic

Question 32 / 40Pyruvate dehydrogenase enzyme complex requires:

A) NAD+ and CoA

B) FAD only

C) ATP only

D) Oxygen

Question 33 / 40Yeast poison themselves to death when alcohol concentration reaches:

A) 5%

B) 10%

C) 13%

D) 20%

Question 34 / 40The ubiquitous energy currency of cell is:

A) ATP

B) DNA

C) RNA

D) NADP

Question 35 / 40Complete oxidation of pyruvate occurs in:

A) Matrix of mitochondria

B) Cytoplasm

C) Intermembrane space

D) Grana

Question 36 / 40The number of ATP consumed during the preparatory phase of glycolysis:

A) 1

B) 2

C) 3

D) 4

Question 37 / 40Oxygen is used in which step of respiration?

A) Glycolysis

B) Krebs Cycle

C) ETS

D) Link reaction

Question 38 / 40RQ of proteins is approximately:

A) 1.0

B) 0.9

C) 0.7

D) 1.5

Question 39 / 40Which of the following is a 4-carbon compound in Krebs cycle?

A) Oxaloacetic acid

B) Citric acid

C) alpha-ketoglutaric acid

D) Acetyl CoA

Question 40 / 40Water is produced during respiration in:

A) Glycolysis

B) Krebs Cycle

C) ETS (Complex IV)

D) Link Reaction