Column I contains some terms and column II contains their meanings. Match the properly and choose the right answer. Column I Column II A. Glycogenesis Conversion of glycogen to glucose B. Glycosuria Conversion of glucose to glycogen C. Glyconeogenesis Excretion of glucose in urine D. Glycogenolysis Conversion of non-carbohydrate sources to glucose Conversion of glucose to starch

A-$$2$$, B-$$3$$, C-$$4$$, D-$$1$$

A- $$1$$, B-$$2$$, C-$$3$$, D-$$4$$

A-$$2$$, B-$$1$$, C-$$3$$, D-$$4$$

A-$$1$$, B-$$5$$, C-$$2$$, D-$$4$$

Incomplete oxidation of carbohydrates

Complete oxidation of carbohydrates

MCQ Questions for Class 11 Medical Biology Respiration In Plants Quiz 9

TCA cycle enzymes are located in

0%
Cristae of the mitochondria.
0%
Outer membrane of the mitochondria.
0%
Mitochondrial matrix.
0%
Mitochondrial intermembrane space.

Choose the correct combination of labeling the molecules involved in the pathway of anaerobic respiration in Yeast.

0%
A - Ethanol, B - $C{ O }_{ 2 }$ , C - Acetaldehyde
0%
A - $C{ O }_{ 2 }$ , B - Ethanol, C - Acetaldehyde
0%
A - Acetaldehyde, B - $C{ O }_{ 2 }$ , C - Ethanol
0%
A - Ethanol, B - Acetaldehyde, C - $C{ O }_{ 2 }$

Explanation

Glucose is converted into pyruvate by the process of glycolysis with net production of 8 ATP. It is further subjected to aerobic oxidation like TCA and electron transport system and leads to the production of CO

$_2$ , water and ATP. But in an anaerobic condition, the pyruvate undergoes fermentation where the pyruvate is broken down into acetaldehyde and carbon dioxide by the enzyme pyruvate decarboxylase, followed by the conversion of acetaldehyde into ethanol.

Select a suitable name for this process.

${C}_{6}{H}_{12}{O}_{6}+2ADP+2Pi \longrightarrow 2{C}_{2}{H}_{5}OH + 2ATP + 2C{O}_{2}\uparrow$

0%
Alcoholic fermentation
0%
Photorespiration
0%
Lactate fermentation
0%
Aerobic respiration

Cellular respiration takes place in the mitochondria of eukaryotic cells. Which process is affected when holes are poked through the inner mitochondrial most membrane?

0%
Production of pyruvate
0%
Production of Acetyl-CoA
0%
Production of NADH
0%
Production of ATP
0%
Production of lactic acid

Which of the following metabolites enter the TCA cycle during glucose oxidation?

0%
Oxaloacetic acid
0%
Pyruvic acid
0%
Acetyl CoA
0%
Malic acid

RQ (Respiratory Quotient) is defined as

0%
$Volume \quad of \quad C{O}_{2} \quad evolved = volume \quad of \quad {O}_{2} \quad consumed$
0%
$\dfrac{Volume \quad of \quad {O}_{2} \quad consumed}{Volume \quad of \quad C{O}_{2} \quad evolved}$
0%
$\dfrac{Volume \quad of \quad C{O}_{2} \quad evolved}{Volume \quad of \quad {O}_{2} \quad consumed}$
0%
$\dfrac{Volume \quad of \quad {O}_{2} \quad evolved}{Volume \quad of \quad C{O}_{2} \quad consumed}$

Explanation

Respiratory Quotient refers to ratio of volume of carbon dioxide released to the volume of oxygen consumsed in given time. It is expressed as volumeof

$CO_2$ evolved/ Volume of

$O_2$ consumed. Correct answer is C.

During complete oxidation of one glucose molecule, the number of ATP molecules obtained by direct substrate level phosphorylation is

0%
2
0%
4
0%
6
0%
8

Removal of water molecule from the substrate is called

0%
Enolation
0%
Phosphorylation
0%
Decarboxylation
0%
Oxidation

Acetylation of pyruvate takes place in the

0%
$F_1$ particles.
0%
Perimitochondrial space.
0%
Mitochondrial matrix.
0%
Cristae.

Column I contains some terms and column II contains their meanings. Match the properly and choose the right answer.

Column I	Column II
A. Glycogenesis	Conversion of glycogen to glucose
B. Glycosuria	Conversion of glucose to glycogen
C. Glyconeogenesis	Excretion of glucose in urine
D. Glycogenolysis	Conversion of non-carbohydrate sources to glucose
	Conversion of glucose to starch

0%
A- $1$ , B- $2$ , C- $3$ , D- $4$
0%
A- $2$ , B- $3$ , C- $4$ , D- $1$
0%
A- $2$ , B- $1$ , C- $3$ , D- $4$
0%
A- $1$ , B- $5$ , C- $2$ , D- $4$

How many glucose molecules are required for the formation of 52 pyruvic acid molecules at the end of glycolysis?

0%
52
0%
46
0%
32
0%
26

Membrane bound Krebs cycle enzyme is

0%
Fumarase
0%
Cis-aconitase
0%
Succinic dehydrogenase
0%
Malate dehydrogenase

Anaerobic respiration following glycolysis is

0%
Oxidative phosphorylation
0%
Krebs cycle
0%
Fermentation
0%
Both A and B

Given below are some reactions and the enzymes involved. Identify the correct pairs.

	I.		II.
$1$ .	Fructose $1, 6$ diphosphate $\rightarrow 3$ PGAL $+$ DHAP	a.	Enolase
$2$ .	Citrate $\rightarrow$ Cis - aconitate	b.	Thiokinase
$3$ .	Succinyl Co. A $\rightarrow$ Succinate	c.	Aconitase
$4$ .	$2$ PGA $\rightarrow$ PEPA	d.	Aldolase

0%
1- d, 2- c, 3- b, 4- a
0%
1- a, 2- b, 3- c, 4- d
0%
1- b, 2- a, 3- d, 4- c
0%
1- c, 2- b, 3- a, 4- b

The number of ATP molecules utilised for the breakdown of one molecule of glucose during glycolysis is

0%
62
0%
2
0%
8
0%
4

Oxalosuccinic acid, an intermediary compound of Krebs cycle is a

0%
4 carbon compound.
0%
3 carbon compound.
0%
5 carbon compound.
0%
6 carbon compound.

Enzyme enolase catalyzes the conversion of 2 PGA to phosphoenol Pyruvic acid in presence of .......... which is the cofactor.

0%
$Mn^{++}$
0%
$Fe^{++}$
0%
$Mg^{++}$
0%
Both A and C

In anaerobic respiration, acetaldehyde is reduced to form alcohol by utilising NADH

$_2$ obtained from

0%
Glycolysis.
0%
Terminal oxidation.
0%
Krebs cycle.
0%
Acetylation.

Explanation

Anaerobic respiration includes a glycolytic breakdown of glucose into pyruvate followed by the fermentation. The NADH

$_2$ formed in glycolysis serves as an electron donor. Terminal oxidation and Kreb's cycle are not carried out in the anaerobic respiration. So, the correct answer is option A.

In Kreb's cycle, guanosine triphosphate is formed during the conversion of

0%
Isocitrate to oxalosuccinate.
0%
Oxalosuccinate to $\alpha$ -ketoglutarate.
0%
Succinyl Co-A to succinate.
0%
Fumarate to malate.

The number of ATP produced when a molecule of glucose undergoes fermentation is?

0%
$4$
0%
$36$
0%
$2$
0%
$38$

Explanation

The chemical breakdown of glucose in the absence of oxygen is called as fermentation. This process is also called anaerobic respiration.
In this reaction, 2 moles of $ATP$ along with 2 molecules of $NADH$ are generated during the conversion of glucose to pyruvate.
This pyruvate is then converted into lactic acid at the expenditure of 2 molecules of $NADH$ . So the net gain is $2$ $ATP$ molecules.

Thus the correct answer is option C.

When 100% carbon is oxidized to CO

$_2$ , the efficiency of such respiration is

0%
40%
0%
60%
0%
90%
0%
100%

Explanation

Oxidation of carbon to CO

$_2$ takes place in aerobic respiration.

The amount of energy released by complete oxidation of 1 mol of glucose = 686 kcal

No. of ATPs produced during respiration = 36

Energy required to produce 1 mol ATP = 7.6 kcal

Total energy used to produce ATPs = 7.6 x 36 = 273.6 kcal

Percentage of total energy conserved = (273.6 / 686) x 100 = 39.88 %

Hence, Efficiency of aerobic respiration is 39.88% i.e. 40%

So, the answer is A.

Which is false regarding EMP pathways?

0%
End product is $CO_2$ and $H_2O$
0%
Substrate level phosphorylation
0%
Production of ATP
0%
Expenditure of ATP

Explanation

Glycolysis process is also known as EMP pathway. The process does not require

$O_2$ and takes place in the cytoplasm. During the whole process of glycolysis, one molecule of glucose (6C) is converted into two pyruvic acid molecule (3C), two ATP are used and 4ATP are evolved. In this process, substrate level phosphorylation is also taken place.

In pne Krebs cycle, decarboxylation takes place at .......... steps.

0%
Five
0%
Four
0%
Three
0%
Two

Series of reactions which can convert fatty acids to sugars in plants but not in animals is

0%
Krebs cycle
0%
Glyoxylate cycle
0%
Ornithine cycle
0%
Glycolysis.

During glycolysis, glucose is first changed to

0%
Glucose 6-phosphate
0%
Fructose 6-phosphate
0%
Glucose 1, 6-phosphate
0%
Fructose 1, 6-phosphate

FAD acts as an

$e^-$ acceptor in between

0%
Fumaric and malic acid
0%
Succinic and fumaric acid
0%
Malic and oxaloacetic acid
0%
Citric and isocitric acid

Explanation

Succinate changes to fumarate in the citric acid cycle. The succinate is a four carbon molecule which is oxidized, to fumarate. In this reaction, two hydrogen atoms with their electrons are transferred to FAD and converts into FADH

$_2$ in presence of enzyme succinate dehydrogenase.

So, the correct answer is option B.

Which one of the following reactions is an example of oxidative decarboxylation?

0%
Conversion of succinate to fumarate.
0%
Conversion of fumarate to malate.
0%
Conversion of pyruvate to acetyl Co-A.
0%
Conversion of citrate to isocitrate.

TCA enzymes mostly occur in

0%
Ribosomes
0%
Mitochondrial matrix
0%
Cytoplasm
0%
Peroxisome

In members of family Crassulaceae, .......... is regenerated from starch during night.

0%
Phosphoenol pyruvic acid
0%
Pyruvic acid
0%
Malic acid
0%
Oxaloacetic acid

Common phase in aerobic and anaerobic respiration is

0%
Krebs cycle.
0%
Glycolysis.
0%
Glycogenolysis.
0%
ETS.

Which one is inhibited if the cells contain excess of ATP

0%
Krebs cycle
0%
Glycolysis
0%
Oxidative phosphorylation
0%
Electron transport

The intermediate of glycolysis which undergoes lysis or splitting is

0%
Dihydroxyacetone 3 - phosphate
0%
Fructose 1,6 - diphosphate
0%
Glyceraldehyde 3 -phosphate
0%
Glucose 6 - phosphate

Formation of phosphoenol pyruvate from 2-pliosphoglycerate is

0%
Dehydration
0%
Dehydrogenation
0%
Oxidation
0%
Hydration

Enzyme taking part in converting dihydroxyacetone phosphate to glyceraldehyde phosphate belongs to the class of

0%
Isomerases
0%
Hydrolases
0%
Ligases
0%
Transferases

Fermentation is

0%
Anaerobic respiration
0%
Incomplete oxidation of carbohydrates
0%
Complete oxidation of carbohydrates
0%
None of the above

For undergoing glycolysis, glucose requires priming with the help of how many ATP?

0%
1
0%
2
0%
3
0%
4

Which one yields the highest energy per gram

0%
Carbohydrate
0%
Protein
0%
Fat
0%
Amino acids

Respiratory formation of ATP during the reactions 1,3-diphosphoglyceric acid-->3-phosphoglyceric acid and phosphoenol pyruvate -->Pyruvate is

0%
Oxidative phosphorylation
0%
Substrate level phosphorylation
0%
Respiratory phosphorylation
0%
Chemical phosphorylation

The different steps of aerobic respiration are

0%
Glycolysis and oxidative phosphorylation
0%
Glycolysis and Krebs cycle
0%
Glycolysis, Krebs cycle and terminal oxidation
0%
Krebs cycle and terminal oxidation

Substrate phosphorylation is the formation of

0%
ATP
0%
AMP
0%
ADP
0%
Pyruvic acid

An amphibolic pathway is

0%
TCA cycle
0%
Calvin cycle
0%
Terminal oxidation
0%
Electron transport chain

A complex enzyme system functional in Krebs cycle is

0%
Citrate synthetase
0%
Isocitrate dehydrogenase.
0%
Oxalosuccinate decarboxylase
0%
$\alpha$ -ketoglutarate dehydrogenase

Inner mitochondrial membrane allows the passage of

0%
Glucose
0%
Pyruvate
0%
NADH
0%
Oxaloacetate

The respiratory enzymes are located in

0%
Mitochondrial matrix
0%
Perimitochondrial space
0%
Cristae
0%
Outer membrane

Number of carbon atoms present in citric acid, oxaloacetic acid, and pyruvic acid are

0%
6, 3 and 3 respectively
0%
6, 4 and 3 respectively
0%
5, 4 and 3 respectively
0%
6, 4 and 2 respectively

Number of ATP molecules synthesised through substrate level phosphorylation during aerobic respiration of one glucose molecule is

0%
8
0%
6
0%
4
0%
2

During conversion of pyruvic acid into acetyl CoA, pyruvic acid is

0%
Reduced
0%
Oxidised
0%
Isomerised
0%
Condensed

A complex enzyme system of mitochondria functional outside Krebs cycle is

0%
Pyruvate kinase
0%
Pyruvate dehydrogenase
0%
Enolase
0%
$\alpha$ - Ketoglutarate dehydrogenase

Tricarboxylic acids of Kreb's cycle are

0%
Succinic acid, Fumaric acid and Citric acid
0%
Oxalosuccinic acid, Citric acid and $\alpha$ -ketoglutaric acid.
0%
Citric acid, Isocitric acid and Malic acid
0%
Citric acid, Isocitric acid and Oxalosuccinic acid

Hydration reaction occurs in Krebs cycle during conversion of

0%
Acetyl CoA to citric acid
0%
$\alpha$ -ketoglutarate to succinyl CoA
0%
Succinate to fumarate
0%
Fumarate to malate

CBSE Questions for Class 11 Medical Biology Respiration In Plants Quiz 9 - MCQExams.com

0:0:1

Practice Class 11 Medical Biology Quiz Questions and Answers

CBSE Questions for Class 11 Medical Biology Respiration In Plants Quiz 9 - MCQExams.com

0:0:1

Practice Class 11 Medical Biology Quiz Questions and Answers

Support mcqexams.com by disabling your adblocker.