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NEET • BIOLOGY • RESPIRATION IN PLANTS

Respiration in plants practice · Mixed difficulty

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Showing 151-180 of 202 questions

151 Medium

151 of 202

Understanding +4 | -1

If a starving plant is provided with glucose, the rate of respiration would

View answer and explanation

Correct option: D

Increase

Option D (Increase) is correct because providing glucose to a starving plant provides readily available substrate for respiration, increasing its rate.

152 Medium

152 of 202

Analyzing +4 | -1

Assertion : During the hydrolysis of typical
chemical bonds, about 3000 calories per mole
are liberated.

Reason : ATP also yields about 3000 calories
per mole after the release of any one of the two
terminal phosphates.

View answer and explanation

Correct option: C

If Assertion is true but Reason is false

Option C (If Assertion is true but Reason is false) is correct because while the assertion about energy release during hydrolysis is approximately correct, the reason regarding ATP yielding 3000 calories per mole is false; ATP yields approximately 7300 calories per mole.

153 Medium

153 of 202

Understanding +4 | -1

Seeds respire in?

View answer and explanation

Correct option: D

Both 1 and 3

Option D (Both 1 and 3) is correct because seeds can respire both in the presence and absence of oxygen, although the pathways differ.

154 Hard

154 of 202

Remembering +4 | -1

A characteristic feature of ripening of some fruits (like banana) is a sudden increase in respiration which is known as

View answer and explanation

Correct option: A

Climactric

Option A (Climactric) is correct because the sudden increase in respiration during fruit ripening is known as the climacteric rise.

155 Medium

155 of 202

Understanding +4 | -1

Respiration in plants

View answer and explanation

Correct option: C

Is characteristic of all living cells

Option C (Is characteristic of all living cells) is correct because respiration is a fundamental process for energy production in all living cells, providing the energy needed for cellular functions.

156 Medium

156 of 202

Remembering +4 | -1

Respiratory substrates are the organic substances which are ____ during respiration to liberate energy?

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Correct option: A

Oxidised

Option A (Oxidised) is correct because respiratory substrates are organic substances that are oxidized during respiration to release energy.

157 Medium

157 of 202

Remembering +4 | -1

Respiratory enzymes are present in the following organelle

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Correct option: C

Mitochondria

Option C (Mitochondria) is correct because mitochondria are the primary site of cellular respiration, where respiratory enzymes are located.

158 Medium

158 of 202

Remembering +4 | -1

Aldolase enzyme is present in

View answer and explanation

Correct option: C

Cytoplasm

Option C is correct because aldolase, an enzyme involved in glycolysis, is located in the cytoplasm.

159 Medium

159 of 202

Application +4 | -1

How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to

C{{O}_{2}}

and

{{H}_{2}}O

yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?

View answer and explanation

Correct option: B

Fifty seven

Option B (Fifty seven) is correct because the total energy from glucose oxidation (686 kcal) divided by the energy per ATP (12 kcal) gives the maximum possible ATP molecules.

160 Hard

160 of 202

Understanding +4 | -1

Assertion (A): For plant respiration there is no need of specialized respiratory organs.

Reason (R): Plants donot show great demands for gaseous exchange.

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 plants have lower energy demands and utilize simple diffusion for gas exchange, negating the need for specialized respiratory organs.

161 Medium

161 of 202

Understanding +4 | -1

In alcohol fermentation,

View answer and explanation

Correct option: C

Triose phosphate is the electron donor, while acetaldehyde is the electron acceptor

Option C (Triose phosphate is the electron donor, while acetaldehyde is the electron acceptor) is correct because during alcoholic fermentation, triose phosphate donates electrons to reduce acetaldehyde to ethanol.

162 Medium

162 of 202

Remembering +4 | -1

Which of the following is necessary for respiration in plants?

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Correct option: B

Oxygen

Option B (Oxygen) is correct because oxygen is the terminal electron acceptor in aerobic respiration, which is essential for energy production in plants.

163 Hard

163 of 202

Understanding +4 | -1

Which of the molecule listed below is a product of fermentation of Glucose by yeast?

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Correct option: B

{C_2}{H_5}OH

Option B (

{C_2}{H_5}OH

) is correct because yeast fermentation of glucose produces ethanol (

{C_2}{H_5}OH

) and carbon dioxide.

164 Hard

164 of 202

Understanding +4 | -1

RQ in anaerobic respiration is?

View answer and explanation

Correct option: D

Infinity

Option D is correct because in anaerobic respiration, there is no oxygen consumption, but carbon dioxide may still be produced, making the RQ value infinite.

165 Easy

165 of 202

Understanding +4 | -1

Select the correct statement(s)

(a) The substrate used in protoplasmic respiration does not contain nitrogen.

(b) Facultative anaerobes respire only in the absence of oxygen

(c) Substrate level ATP synthesis also occurs during glycolysis

(d) The ultimate product of glycolysis is pyruvic acid

View answer and explanation

Correct option: C

Option C ((c) and (d)) is correct because substrate-level ATP synthesis occurs during glycolysis, and the ultimate product of glycolysis is pyruvic acid.

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166 Easy

166 of 202

Remembering +4 | -1

Which of the following substrates is used in the formation of alcohol?

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Correct option: A

Sucrose

Option B (Glucose) is correct because glucose is the primary substrate used in the formation of alcohol during fermentation.

167 Easy

167 of 202

Understanding +4 | -1

Which one is true for ATP?

View answer and explanation

Correct option: D

ATP is a coenzyme

Option D (ATP is a coenzyme) is correct because ATP acts as a coenzyme in many enzymatic reactions, providing the energy needed for the reaction to proceed.

168 Medium

168 of 202

Remembering +4 | -1

Among the following, identify the substrate required for the only oxidative reaction that occurs in the process of glycolysis.

View answer and explanation

Correct option: B

Glyceraldehyde 3-phosphate

Option B is correct because Glyceraldehyde 3-phosphate is the substrate that undergoes oxidation in glycolysis, catalyzed by glyceraldehyde-3-phosphate dehydrogenase.

169 Medium

169 of 202

Remembering +4 | -1

The equation of respiration is

View answer and explanation

Correct option: A

{C}_6{H}_{12}{O}_6+6{O}_2 \rightarrow 6{CO}_2+6{H}_2{O}+686\, \mathrm{k\,cal}

Option A (

{C}_6{H}_{12}{O}_6+6{O}_2 \rightarrow 6{CO}_2+6{H}_2{O}+686\, \mathrm{k\,cal}

) is correct because it accurately represents the balanced chemical equation for aerobic respiration, showing glucose reacting with oxygen to produce carbon dioxide, water, and energy.

170 Medium

170 of 202

Understanding +4 | -1

Which of the following statement is not true for the EMP pathway?

View answer and explanation

Correct option: B

Net 4 ATP gained

Option B (Net 4 ATP gained) is correct because the net ATP gain in glycolysis is 2 ATP, not 4 ATP. While 4 ATP are produced, 2 ATP are consumed in the initial steps.

171 Medium

171 of 202

Analyzing +4 | -1

Assertion: RQ of maturing fatty seeds is

>1

.

Reason: Fats are preferred energy fuels.

View answer and explanation

Correct option: C

If Assertion is true statement but Reason is false

Option C (If Assertion is true statement but Reason is false) is correct because the RQ of maturing fatty seeds is greater than 1 due to the conversion of fats to carbohydrates, but fats are not the preferred energy fuels.

172 Medium

172 of 202

Application +4 | -1

The respiratory quotient of the reaction given below is

2\left(\mathrm{C}_{51} \mathrm{H}_{98} \mathrm{O}_6\right)+145 \mathrm{O}_2 \rightarrow 102 \mathrm{CO}_2+\mathbf{9 0 \mathrm { H } _ { 2 } \mathrm { O } + \text { energy }}

View answer and explanation

Correct option: A

0.703

Option A (0.703) 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 ≈ 0.703.

173 Medium

173 of 202

Remembering +4 | -1

In mitochondria, enzyme cytochrome oxidase is present in

View answer and explanation

Correct option: C

Inner membrane

The correct answer is C (Inner membrane) because cytochrome oxidase, a key enzyme in the electron transport chain, is located in the inner mitochondrial membrane.

174 Medium

174 of 202

Analyzing +4 | -1

The reaction which is catalysed by a protein that is not found in the matrix of mitochondria is

View answer and explanation

Correct option: C

Oxidation of Succinic acid

Option C (Oxidation of Succinic acid) is correct because Succinate dehydrogenase, which catalyzes this reaction, is located on the inner mitochondrial membrane, not in the matrix.

175 Medium

175 of 202

Remembering +4 | -1

NADP, NAD and FAD are acceptors of

View answer and explanation

Correct option: B

Electrons

Option B (Electrons) is correct because NADP, NAD, and FAD are electron carriers that accept electrons during redox reactions.

176 Medium

176 of 202

Understanding +4 | -1

During conversion of pyruvic acid into acetyl Co-A, pyruvic acid is

View answer and explanation

Correct option: A

Oxidized

Option A (Oxidized) is correct because pyruvic acid loses electrons during its conversion to acetyl Co-A, which defines oxidation.

177 Medium

177 of 202

Remembering +4 | -1

In oxidative decarboxylation, enzyme used to

View answer and explanation

Correct option: B

Pyruvate dehydrogenase

The correct answer is B (Pyruvate dehydrogenase) because pyruvate dehydrogenase complex catalyzes the oxidative decarboxylation of pyruvate to acetyl-CoA, linking glycolysis to the Krebs cycle.

178 Easy

178 of 202

Remembering +4 | -1

Steps of respiration are controlled by

View answer and explanation

Correct option: B

Enzymes

Option B is correct because enzymes catalyze and regulate the various steps of respiration.

179 Hard

179 of 202

Analyzing +4 | -1

Assertion (A): Glycolysis is the oxidative process, while there is not utilization of

\mathrm{O}_2.

Reason (R): In glycolysis two redox equivalents are removed in form of two hydrogen atoms.

View answer and explanation

Correct option: A

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

Option A (Both (A) & (R) are true and the (R) is the correct explanation of the (A)) is correct because glycolysis is oxidative despite not using O2, and this oxidation involves removing redox equivalents.

180 Medium

180 of 202

Remembering +4 | -1

Anaerobic respiration generally occurs in

View answer and explanation

Correct option: A

Lower organism, e.g., bacteria and fungi

Option A (Lower organism, e.g., bacteria and fungi) is correct because anaerobic respiration is more common in these organisms due to their metabolic pathways and environments.

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