Glucose is converted into $C{O_2}$

Pyruvic acid is converted into ATP

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NEET • BIOLOGY • RESPIRATION IN PLANTS

Respiration in plants practice · Mixed difficulty

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Showing 61-90 of 202 questions

61 Medium

61 of 202

Remembering +4 | -1

Beer and butter milk are products of fermentation by

View answer and explanation

Correct option: D

Saccharomyces cerevisiae

Option D (Saccharomyces cerevisiae) is correct because this yeast species is widely used in the fermentation of beer and other alcoholic beverages, as well as in dairy fermentation.

62 Hard

62 of 202

Remembering +4 | -1

The enzymes for TCA cycle are present in

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Correct option: C

Mitochondria

The correct answer is C (Mitochondria) because the enzymes of the TCA cycle (Krebs cycle) are located in the mitochondrial matrix.

63 Medium

63 of 202

Remembering +4 | -1

Net gain of ATP molecules per hexose during aerobic respiration is

View answer and explanation

Correct option: C

Option C (36) is correct because the net gain of ATP molecules per hexose during aerobic respiration is approximately 36.

64 Medium

64 of 202

Application +4 | -1

How many PGAL are produced by glycolysis of 3 molecules of glucose? How many ATP are released by respiration of these PGAL till formation of

C{O_2}

and

{H_2}O

View answer and explanation

Correct option: D

6 PGAL-120ATP

Option D (6 PGAL-120ATP) is correct because 3 glucose molecules produce 6 PGAL molecules, and each PGAL molecule yields approximately 20 ATP molecules during respiration.

65 Hard

65 of 202

Understanding +4 | -1

Assertion (A): During fermentation oxidation of NADH to

\text{NAD}^+

is comparatively slow process than aerobic respiration.

Reason (R): NADH arise during fermentation do not enter in ETC, it is to reduce the pyruvate or aldehyde.

View answer and explanation

Correct option: A

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Option A is correct because during fermentation, the oxidation of NADH to NAD+ is slower than in aerobic respiration, and the NADH produced does not enter the ETC but reduces pyruvate or acetaldehyde.

66 Hard

66 of 202

Understanding +4 | -1

Fats enters into Amphibolic pathway, need to be broken down into?

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Correct option: C

1 and 2

Option C (1 and 2) is correct because fats must be broken down into glycerol and fatty acids before entering the amphibolic pathway.

67 Hard

67 of 202

Remembering +4 | -1

Which one is correct sequence in glycolysis?

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Correct option: B

G - 6 - P \to 3PGAL \to 3PGA \to PEP

Option B is correct because the correct sequence is

G - 6 - P \to 3PGAL \to 3PGA \to PEP

. This represents a portion of the glycolytic pathway.

68 Medium

68 of 202

Remembering +4 | -1

The tissue of highest respiratory activity is?

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Correct option: A

Meristems

Option A (Meristems) is correct because meristematic tissues, which are actively dividing cells in plants, have the highest respiratory activity due to their high metabolic rate.

69 Medium

69 of 202

Understanding +4 | -1

In succulent plants like Opuntia, the RQ value will be

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Correct option: D

Zero

Option D is correct because succulent plants like Opuntia fix carbon dioxide at night and have minimal respiration, resulting in an RQ value close to zero.

70 Easy

70 of 202

Understanding +4 | -1

The ratio of carbons found in lactic acid and ethanol respectively

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Correct option: D

3:2

Option D (

3:2

) is correct because lactic acid has 3 carbons (C3H6O3) and ethanol has 2 carbons (C2H5OH), so the ratio is 3:2.

71 Medium

71 of 202

Remembering +4 | -1

During photorespiration, loss of

C{O_2}

occurs in which of the given cell organelles?

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Correct option: C

Mitochondria

Option C (Mitochondria) is correct because the release of

CO_2

during photorespiration occurs in the mitochondria.

72 Hard

72 of 202

Understanding +4 | -1

Assertion (A): Water molecules appear on both sides of the equation of photosynthesis.

Reason (R): The molecules that enter the reaction are not the same molecules that emerge from the reaction.

View answer and explanation

Correct option: B

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

Option B is correct because both the assertion and reason are true, but the reason does not directly explain the assertion. The water molecules are split and reformed during photosynthesis.

73 Medium

73 of 202

Application +4 | -1

In the given equation below, identify the compound which is being oxidized and calculate the R.Q. of the same.

\left({C}_{15} {H}_{98} {O}_6\right)+145 {O}_2 \rightarrow 102 {CO}_2+98 {H}_2 {O}+\text {energy }

View answer and explanation

Correct option: B

Tripalmitin, R.Q. = 0.7

Option B (Tripalmitin, R.Q. = 0.7) is correct because tripalmitin is a fat, and the RQ for fats is approximately 0.7, calculated from the balanced equation.

74 Medium

74 of 202

Analyzing +4 | -1

RQ value of 4 may be expected for the complete oxidation of which one of the following?

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Correct option: C

Oxalic acid

Option C (Oxalic acid) is correct because oxalic acid has the highest carbon to oxygen ratio among the given options, leading to a higher RQ value of 4.

75 Medium

75 of 202

Understanding +4 | -1

Fate of pyruvic acid during aerobic respiration is

View answer and explanation

Correct option: C

Oxidative decarboxylation

Option C (Oxidative decarboxylation) is correct because it describes the process where pyruvic acid is converted to Acetyl CoA, releasing carbon dioxide.

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76 Easy

76 of 202

Remembering +4 | -1

In anaerobic respiration bacteria produce

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Correct option: A

Lactic acid

Option A (Lactic acid) is correct because lactic acid fermentation is a common type of anaerobic respiration carried out by bacteria.

77 Medium

77 of 202

Remembering +4 | -1

Respiration is completely absent in

View answer and explanation

Correct option: A

Bacteriophage

Option A (Bacteriophage) is correct because bacteriophages are viruses, and viruses are not capable of independent respiration; they rely on host cells.

78 Medium

78 of 202

Understanding +4 | -1

What will happen, when glucose is administered orally?

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Correct option: D

Respiration

Option C (Circulation) is the most direct answer. Glucose, when administered orally, is absorbed into the bloodstream and then circulated throughout the body for use in cellular respiration.

79 Hard

79 of 202

Understanding +4 | -1

Assertion (A): During oxidation within a cell, all the energy contained in into the cell, in a single step.

Reason (R): The energy released by oxidation in respiration is not (or rather cannot be) used directly but is used to synthesise ATP.

View answer and explanation

Correct option: D

Both (A) and (R) are false

Option D (Both (A) and (R) are false) is correct because the energy is released in multiple steps, not a single step, and the energy is used to synthesize ATP.

80 Easy

80 of 202

Remembering +4 | -1

Cell respiration is carried out by

View answer and explanation

Correct option: B

Mitochondria

Option B (Mitochondria) is correct because cellular respiration, the process of generating energy (ATP) from glucose, primarily occurs in the mitochondria.

81 Medium

81 of 202

Application +4 | -1

How many ATP molecules can be produced through oxidative phosphorylation of

2NAD{{H}_{2}}\,\,\text{and}\,\,3FAD{{H}_{2}}

View answer and explanation

Correct option: D

Option D (12) is correct because each NADH2 produces 3 ATP and each FADH2 produces 2 ATP through oxidative phosphorylation.

82 Hard

82 of 202

Remembering +4 | -1

How much of the energy of a glucose molecule is released in anaerobic respiration ending with fermentation?

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Correct option: C

Less than 7%

Option C (Less than 7%) is correct because anaerobic respiration, specifically fermentation, releases a very small amount of energy compared to aerobic respiration.

83 Medium

83 of 202

Analyzing +4 | -1

Four respiratory enzymes are given below. Arrange them in increasing order of the carbon number of the substrates on which they act.
I. Enolase
II. Aconitase
III. Fumarase
IV. Alcohol Dehydrogenase

View answer and explanation

Correct option: D

IV, I, III, II

Option D (IV, I, III, II) is correct because it arranges the enzymes based on the increasing carbon number of their substrates: Alcohol Dehydrogenase (2C), Enolase (3C), Fumarase (4C), Aconitase (6C).

84 Easy

84 of 202

Remembering +4 | -1

Incomplete breakdown of sugar in anaerobic respiration forms

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Correct option: B

Alcohol and carbon dioxide

Option B (Alcohol and carbon dioxide) is correct because anaerobic respiration of sugar results in the formation of alcohol and carbon dioxide.

85 Easy

85 of 202

Remembering +4 | -1

In electron transport system, which of the following acts as a final hydrogen acceptor

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Correct option: A

Oxygen

Option A (Oxygen) is correct because oxygen acts as the final electron acceptor in the electron transport system, forming water.

86 Hard

86 of 202

Understanding +4 | -1

During glycolysis, how many redox equivalents is/are removed by two PGAL molecules and transferred to

\mathrm{NAD}^{+}

View answer and explanation

Correct option: C

4

Option C (4) is correct because two PGAL molecules produce two NADH molecules, each carrying two redox equivalents, totaling four.

87 Medium

87 of 202

Understanding +4 | -1

In Krebs’ cycle,

View answer and explanation

Correct option: B

Pyruvic acid is converted into

C{O_2}

and

{H_2}O

Option D (Pyruvic acid is converted into

C{O_2}

and

{H_2}O

) is correct because the Krebs cycle involves the complete oxidation of pyruvic acid derivatives into carbon dioxide and water.

88 Medium

88 of 202

Analyzing +4 | -1

Select the wrong statement.

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Correct option: B

The intermediate compound which links glycolysis with Krebs’ cycle is malic acid

Option B (The intermediate compound which links glycolysis with Krebs’ cycle is malic acid) is wrong because Acetyl-CoA, not malic acid, links glycolysis to the Krebs cycle.

89 Medium

89 of 202

Application +4 | -1

Refer the given equation?

2\left( {{C_{51}}{H_{98}}{O_6}} \right) + 145\,\,{O_2} \to 102C{O_2} + 98{H_2}O +

energy the RQ in this case is

View answer and explanation

Correct option: B

0.7

Option B (0.7) is correct because the respiratory quotient (RQ) is calculated as the ratio of CO2 produced to O2 consumed, which in this case is 102/145 ≈ 0.7.

90 Hard

90 of 202

Remembering +4 | -1

The correct sequence of cytochromes in ETC is

View answer and explanation

Correct option: B

Cyt b, c_1, c, a, a_3

The correct answer is B (

Cyt b, c_1, c, a, a_3

) because this is the correct sequence of electron carriers (cytochromes) in the electron transport chain (ETC).

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