Chapter 14

Besides the net gain of 2 ATP molecules in glycolysis which other molecules are simultaneously formed? (a) \(\mathrm{FADH}_{2}\) (b) \(\mathrm{NADPH}_{2}\) (c) \(\mathrm{NADH}_{2}\) (d) \(\mathrm{FAMH}_{2}\)

The total ATP production during EMP pathway is (a) 24 ATP molecules (b) 8 ATP molecules (c) 38 ATP molecules (d) 6 ATP molecules

Glycolysis takes place in (a) Mitochondria (b) Cytoplasm (c) Both mitochondria and cytoplasm (d) Vacuole

Pyruvate (pyruvic acid) dehydrogenase is used in converting (a) Pyruvate to glucose (b) Glucose to pyruvate (c) Pyruvic acid to lactic acid (d) Pyruvate (pyruvic acid) to acetyl-CoA

The number of molecules of pyruvic acid formed from one molecule of glucose at the end of glycolysis is (a) 1 (b) 2 (c) 3 (d) 4

What is the other name of glycolysis? (a) EMP pathway (b) TCA pathway (c) HMS pathway (d) None of these

The common phase between aerobic and anaerobic respiration is called (a) Tricarboxylic acid cycle (b) Oxidative phosphorylation (c) Embden, Meyerhoff, Parnas cycle (d) Kreb's cycle

The oxidation of one NADH \(_{2}\) yields (a) 18 ATP (b) \(6 \mathrm{ATP}\) (c) 3 ATP (d) \(2 \mathrm{ATP}\)

The end product of glycolysis is (a) acetyl-CoA (b) Citric acid (c) Pyruvic acid (d) Fumaric acid

The first step of glycolysis is: (a) Breakdown of glucose (b) Phosphorylation of glucose (c) Conversion of glucose into fructose (d) Dehydrogenation of glucose

Which of the following is the correct sequence of glycolysis? (a) \(\mathrm{G} 6-\mathrm{P} \rightarrow \mathrm{PEP} \rightarrow 3-\mathrm{PGAL} \rightarrow 3-\mathrm{PGA}\) (b) \(\mathrm{G} 6-\mathrm{P} \rightarrow 3-\mathrm{PGAL} \rightarrow 3-\mathrm{PGA} \rightarrow \mathrm{PEP}\) (c) \(\mathrm{G} 6-\mathrm{P} \rightarrow \mathrm{PEP} \rightarrow 3-\mathrm{PGA} \rightarrow 3-\mathrm{PGAL}\) (d) \(\mathrm{G} 6-\mathrm{P} \rightarrow 3-\mathrm{PGA} \rightarrow 3-\mathrm{PGAL} \rightarrow \mathrm{PEP}\)

Which intermediate compound is involved in the synthesis of amino acids? (a) Malic acid (b) Citric acid (c) \(\alpha\) -ketoglutaric acid (d) Isocitric acid

In ATP molecule, the energy is stored in (a) Chemical bonds (b) Hydrogen bonds (c) Carbon bonds (d) Pyrophosphate bonds

Kreb's cycle is termed as the aerobic phase of respiration because (a) It consumes oxygen (b) Oxygen acts as a catalyst (c) Aerobic conditions are essential for the continued operation of electron transport system (d) All the above

Between which of the following stages, GTP is formed by substrate level phosphorylation? (a) Succinate to fumarate (b) Ketoglutarate to succinate (c) Oxalosuccinate to glutarate (d) Fumarate to malate

How many molecules of ATP are produced per molecule of FADH \(_{2}\) oxidized? (a) One (b) Two (c) Three (d) Four

A molecule of ATP is formed when electron passes from (a) Cyt c to Cyt a (b) Cyt a to Cyt c (c) Cyt b to Cyt c \(_{1}\) (d) Cyt c to Cyt b

Kreb's cycle is also known as (a) Glyoxylate cycle (b) EMP pathway (c) Citric acid cycle (d) Glycolate cycle

The link between glycolysis and Kreb's cycle is (a) Citric acid (b) Acetyl-CoA (c) Succinic acid (d) Oxaloacetic acid

The reaction of Kreb's cycle take place (a) In cytoplasm (b) In endoplasmic reticulum (c) In matrix of mitochondria (d) On the surface of mitochondrion

Oxidative phosphorylation occurs in the (a) Outer membrane of mitochondria (b) Inner membrane of mitochondria (c) Stroma of chloroplast (d) Grana of chloroplast

Which of the following is the correct sequence in Kreb's cycle? (a) Isocitric acid \(\rightarrow\) Oxalosuccinic acid \(\rightarrow \alpha\) -ketoglutaric acid (b) Oxalosuccinic acid \(\rightarrow\) Isocitric acid \(\rightarrow \alpha\) -ketoglutaric acid (c) \(\alpha\) -ketoglutaric acid \(\rightarrow\) Isocitric acid \(\rightarrow\) Oxalosuccinic acid (d) Isocitric acid \(\rightarrow \alpha\) -ketoglutaric acid \(\rightarrow\) Oxalosuccinic acid

In how many steps, \(\mathrm{CO}_{2}\) is released in aerobic respiration of pyruvic acid? (a) One (b) Six (c) Three (d) Twelve

The formation of acetyl coenzyme-A from pyruvic acid is the result of its (a) Reduction (b) Dehydration (c) Dephosphorylation (d) Oxidative decarboxylation

Oxidative phosphorylation and photophosphorylation both require the electron carrier (a) Cytochrome (b) Oxygen (c) Carbon dioxide (d) Water

In an electron transport chain, in terminal oxidation, the cytochrome which donates electrons to \(\mathrm{O}_{2}\) is (a) Cytochrome b (b) Cytochrome c (c) Cytochrome \(\mathrm{a}_{3}\) (d) Cytochrome a

The last or terminal cytochrome in respiratory chain is (a) Cyt b (b) Cyt a \(_{3}\) (c) Cyt a (d) Cyt c

The correct sequence of electron acceptor in ATP synthesis is (a) Cyt a \(\mathrm{a}_{3} \mathrm{~b} \mathrm{c}\) (b) Cyt b c a a \(_{3}\) (c) Cyt b c a \(_{3}\) a (d) Cyt c b a a \(_{3}\)

In Kreb's cycle, the FAD precipitates as electron acceptor during the conversion of (a) Succinyl CoA to succinic acid (b) \(\alpha\) -ketoglutarate to succinyl \(\mathrm{CoA}\) (c) Fumaric acid to maleic acid (d) Succinic acid to fumaric acid

RQ for glucose is (a) 1 (b) \(0.5\) (c) 2 (d) \(0.05\)

With which of the following fatty acid the value of \(\mathrm{RQ}\) is one? (a) Acetic acid (b) Oleic acid (c) Stearic acid (d) Palmitic acid

RQ of fatty substances is generally (a) Unity (b) Less than one (c) Greater than one (d) Zero

RQ of sprouting potato tubers will be (a) 1 (b) \(<1\) (c) \(>1\) (d) 0

\(\mathrm{RQ}\) in anaerobic respiration is (a) 0 (b) \(\propto\) (c) 1 (d) \(>1\)

Assertion: Glycolysis occurs in cytoplasm. Reason: Enzymes for glycolysis are found in cytoplasm.

Assertion: Power house of cell is mitochondria. Reason: ATP is produced in mitochondria.

Assertion: The inner membrane of mitochondria contains enzymes of Kreb's cycle Reason: The mitochondrial matrix contains systems involving electron transport.

Assertion: Respiration is an amphibolic pathway. Reason: Respiratory pathway is involved in both catabolism and anabolism.

Assertion: The breakdown of glucose to pyruvic acid is called glycolysis. Reason: For complete oxidation of glucose organism adopt Kreb's cycle.

Assertion: Substrate level phosphorylation is present in glycolysis. Reason: Substrate level phosphorylation causes synthesis of ATP.

Assertion: When carbohydrates are used as substrate and are completely oxidized, the RQ will be 1 Reason: Equal amount of \(\mathrm{CO}_{2}\) and \(\mathrm{O}_{2}\) are evolved and consumed during the above process.

Assertion: In ETS the ultimate acceptor of electrons is \(\mathrm{O}_{2}\) Reason: Substrate level phosphorylation also occurs in Kreb's cycle.

Assertion: \(\mathrm{F}\) particles are present in the inner mitochondrial membrane. Reason: The passage of protons through the channel is coupled to the catalytic site of the \(\mathrm{F}_{1}\) component for the production of ATP.

Assertion: Food has to be translocated to all non green parts of plant. Reason: Non-green part can't synthesize their food.

Assertion: Glucose is a respiratory substrate. Reason: Glucose is oxidised during process of cellular respiration.

Assertion: ATP acts as energy currency of cell. Reason: ATP broken down whenever and wherever energy needs to be utilized.

Assertion: Oxidation of glucose occurs in multiple steps. Reason: It enables released energy can be coupled to ATP synthesis.

Assertion: Glycolysis is referred as EMP pathway Reason: The scheme of glycolysis was given by Embden, Meyerhof and Parnas.

Assertion: Kerb's cycle is referred as aerobic respiration Reason: In Kerb's cycle glucose is completely oxidised to \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\)

Assertion: Fermentation and aerobic respiration generate different amount of ATP. Reason: Fermentation leads to partial breakdown of glucose where as aerobic respiration lead to complete breakdown of glucose into \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\) which generate more amount of energy.