Respiration in plants

NADH+H^+ is a ________ agent (reducing/oxidizing)

Reducing

It is reoxidied to NAD+

The small protein attached to the outer surface of the inner mitochondrial membrane and acts as a mobile carrier for transfer of electrons between complex III and IV in the electron transport system (ETS) is

(1) Ubiquinone

(2) Ferredoxin

(3) Cytochrome-c

(4) F1 particle

3

Identify the incorrect one for glycolysis

(1) Fructose can enter the glycolysis pathway

(2) Total 2 ATP molecules are directly synthesised during glycolysis from one glucose molecule

(3) Glycolysis operates as long as it is supplied with NAD+ to pick up hydrogen atoms

(4) It is seen in all living organisms

2

Select the correct option w.r.t. statements A and B

A- Alcoholic fermentation is restricted to prokaryotes.

B- The enzyme pyruvic acid decarboxylase is found in prokaryotes only

(1) Only A is true

(2) Both A and B are true and B is correct reason of A

(3) Both A and B are false

(4) Only B is true

3

Complex V of ETS, transports

(1) Electrons from complex IV to O2

(2) Protons from intermembrane space to matrix

(3) Electrons between UQ and complex IV

(4) Protons from matrix to inter membrane space

2

Pyruvate dehydrogenase complex, require several co-enzymes like

(1) Coenzyme A and Cd

(2) UQ and coenzyme A

(3) NAD+ and coenzyme Q

(4) Coenzyme A and NAD+

4

How many Pathways for pyruvic acid

CO2 & Ethanol

Lactic acid

Aerobic Respiration

The breaking of C-H bonds of complex compounds through oxidation within the cells, leads to release of considerable amount of energy is called respiration.

False

Breaking of C-C bonds

After pyruvate enters mitochondrial matrix, it undergoes oxidative decarboxylation by a complex set of reactions catalysed by pyruvic dehydrogenase.

True

During conversion of succinyl CoA to succinic acid a molecule of GTP is synthesized. This is oxidative phosphorylation.

False

SLP

(Substrate lvl phosphorylation)

Fatty acids and glycerol breakdown into

fatty acid: Acetyl CoA

Glycerol: DHAP

Which process uses both decarboxylase and alcohol dehydrogenase?

Ethanol & CO2 pathway

Common intermediate for fats, carbohydrates,and proteins

Acetyl CoA

Protein can enter into pathway thru

Pyruvic acid

Acetyl CoA

Kreb cycle

Anaerobic fermentation can take place in prokaryotes only

False

For complete oxidation of glucose to CO2 and H2O organism adopt (kreb cycle/ SLP)

Kreb cycle

Ubiquinol is the oxidized ubiquinone

False

Reduced

The presence of oxygen in aerobic respiration is vital, since it drives the whole process by removing hydrogen from the system.

True

The passage of protons through the Fo channel is coupled to the catalytic site of the F₁ component for the production of ATP

True

Tripalmitin formula

C51H98O6

Pure proteins or fats can be used as respiratory substrates

False

Can n

How many different enzymes in aerobic respiration of gluc coenzyme? utilize NAD as

(1) 8

(2) 4

(3) 5

(4) 7

3

Complete oxidation of pyruvate, how many CO2 released ?

3

Place of kreb cycle and ETS

Matrix of mitochondria

Inner mmb of mitochondria

How many 5C compounds are formed during Kreb's cycle, if three pyruvate molecules enter into mitochondria?

(1) 5

(2) 10

(3) 6

(4) 3

4

In case of severe copper deficiency in plants, which of the following complexes of ETS will not be formed?

(1) Complex I

(2) Complex II

(3) Complex III

(4) Complex IV

4

All of the following are components in inner mitochondrial membrane associated with passage of protons across the membrane, except

(1) NADH dehydrogenase

(2) Succinate dehydrogenase

(3) Cytochrome bc₁ complex

(4) Fo protein complex

2

The proton gradient across mitochondrial membrane is a result of

(1) Energy of oxidation - reduction

(2) Transfer of electrons from complex-1 to complex III via plastoquinone

(3) Flow of H* via Fo particle

(4) Production of GTP in mitochondrial matrix

1

In link rxn, one pyruvic acid give two NADH?

Link rxn aka?

False.

2 gives 2

Oxidative decarboxylation

TCA starts with

Condensation of acetyl grp with OAA and water to yield citric acid

Final hydrogen acceptor

Oxygen

One of the component of complex I in ETS is

(1) FAD

(2) FMN

(3) Cytochrome b

(4) Cytochrome c

2

Select incorrect option about pyruvate dehydrogenase enzyme

(1) Requires Mg+2 as cofactor

(2) Requires NAD+ as coenzyme

(3) Converts pyruvic acid to acetyl CoA

(4) Converts pyruvic acid to acetaldehyde

4 (decarboxylase does that)

Pyruvate dehydrogenase enzyme converts pyruvic acid to acetyl coenzymeA