Respiration in Plants Test

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Respiration in Plants Test - 12

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Question 1
1 / -0

Site of glycolysis or EMP is

A
Mitochondria

B
Cytoplasm

C
E.R.

D
Ribosomes

Solution

Glycolysis is the first step of aerobic respiration in all living organisms. It is an anaerobic pathway which does not require oxygen and takes place in the cytoplasm of cells. This initial process takes place in 10 steps, each one of which is catalyzed by different enzymes. The scheme of glycolysis was first described by Gustav Embden, Otto Meyerhof, and J. Parnas and is often referred to as EMP pathway.
The second and thirds steps of respiration which are Kreb's cycle and Electron transport chain occur in mitochondria of cells and requires oxygen as the enzymes for these steps are present in mitochondria.
ER is an organelle that provides the structural framework to cells and is majorly concerned with the synthesis of lipids and proteins and also responsible for transport of materials.
Ribosomes are the protein factories and are present either on ER or lie freely in the cytoplasm of cells.
Thus, the correct answer is option B.
Question 2
1 / -0

Which one is removed from substrate during glycolysis

A
Hydrogen

B
Electrons

C
Both A and B

D
Oxygen

Solution

During the aerobic processes, glycolysis is the first breakdown of glucose that takes place in the cytoplasm and it is a common pathway between the aerobic and anaerobic respiration.
During glycolysis 6C glucose is broken down into three carbon molecule pyruvic acid which is formed by removal of both hydrogen and electron from glucose during glycolysis.
So, the correct option is 'Both A and B'
Question 3
1 / -0

Most common mineral activator of glycolytic enzymes is

A
Fe

B
Zn

C
Mg

D
Mn

Solution

Glycolysis is the first step of respiration which takes place in 10 steps and each step occurs in the presence of a specific enzyme. Various enzymes require divalent magnesium ions as cofactor. The first, third, sixth, eighth, and ninth steps require magnesium ions as an activator for the actual enzymes to function.
Thus, the correct answer is option C.
Question 4
1 / -0

Phosphoglyceraldehyde and dihydroxy acetone phosphate are

A
Isomers

B
Polymers

C
Tautomers

D
Synonyms

Solution

In step 4 of glycolysis, the enzyme aldolase splits fructose 1,6 diphosphate into two 3-carbon sugars that are isomers of each other. Both have the same molecular formula but differ in the arrangement of atoms. The two molecules exist in equilibrium with each other but only glyceraldehyde 3- phosphate can directly continue through the next steps of glycolysis. DHAP is converted into glyceraldehyde 3-phosphate.
Thus, the correct answer is option A.
Question 5
1 / -0

Which is formed along with ATP in glycolysis

A
NADH

B
NADPH

C
FAD

D
$$FADH_2$$

Solution

The net yield of the process of glycolysis is 2 ATP molecules and 2 NADH molecules, and 2 protons for each glucose molecule oxidized to pyruvate. Four ATP molecules are produced in the sixth and ninth steps of glycolysis. Two ATP molecules are consumed in the first and third steps of glycolysis. Two molecules of NADH are formed in step 5 of glycolysis by the acceptance of 2 protons and four electrons by two molecules of NAD+.
Thus, the correct answer is option A.
Question 6
1 / -0

R.Q. stands for

A
Resistance coefficient

B
Replicase concentration

C
Respiratory quotient

D
Reticular concentration

Solution

Respiratory quotient (RQ) is the ratio of the volume of carbon dioxide released to the volume of oxygen taken in respiration in the given period of time at standard temperature and pressure.
RQ = CO2 eliminated / O2 consumed
Name of the substance Respiratory Quotient
Carbohydrates 1
Proteins 0.8 - 0.9
Triolein 0.7
Tripalmitin (Fat) 0.7
Malic acid 1.33
Tartaric acid 1.6
Oxalic acid 4.0
Thus, the correct answer is option C.
Question 7
1 / -0

An amphibolic pathway is

A
TCA cycle

B
Calvin cycle

C
Terminal oxidation

D
Electron transport chain

Solution

Kreb's cycle consists of 8 cyclic steps which take place in the mitochondrial matrix. Each step is catalyzed by a specific enzyme. In Kreb's cycle, the entrant molecule is 2- carbon acetyl coenzyme A and the receptor molecule is 4- carbon oxaloacetate. Since the process involves both catabolic and anabolic reactions. it is an amphibolic pathway. It degrades acetyl coenzyme A and yields carbon dioxide and energy which is used to produce NADH, H+, and FADH+
Thus, the correct answer is option A.
Question 8
1 / -0

The term 'fermentation' was coined by

A
Cruickshank

B
Kostytchev

C
Pasteur

D
Buchner

Solution

The process of fermentation is the form of anaerobic respiration carried by some microorganisms. Many microorganisms such as fungus and bacteria can grow and flourish in the complete absence of oxygen. Such microorganisms can utilize sugars to convert it into ethanol or other products and evolve carbon dioxide. Cruickshank used the term 'fermentation' for this process of anaerobic respiration by the microorganisms.
Thus, the correct answer is option A.
Question 9
1 / -0

Number of carbons in pyruvic acid is

A
6

B
3

C
2

D
1

Solution

Glucose is a 6 carbon organic compound that undergoes glycolysis during the process of aerobic respiration. Each molecule of glucose forms 2 molecules of pyruvic acid as the end product of glycolysis. Pyruvic acid is a 3 carbon compound which then enters Krebs' cycle by going through a link reaction.
So the answer is '3'.
Question 10
1 / -0

R.Q. is ratio of

A
CO$$_2$$ produced to substrate consumed

B
CO$$_2$$ produced to O$$_2$$ consumed

C
Oxygen consumed to water produced

D
Oxygen consumed to CO$$_2$$ produced.

Solution

R.Q stands for respiratory quotient or respiratory ratio. It is the volume of CO$$_2$$evolved to the volume of O$$_2$$ consumed. It depends upon the type of respiratory substrate used during respiration. When carbohydrates are used as a substrate and are oxidized completely the RQ is 1. For fats, it is less than 1 and for proteins, it is 0.9.
So, the correct option is 'CO$$_2$$ produced to O$$_2$$ consumed'.

Name of the substance	Respiratory Quotient
Carbohydrates	1
Proteins	0.8 - 0.9
Triolein	0.7
Tripalmitin (Fat)	0.7
Malic acid	1.33
Tartaric acid	1.6
Oxalic acid	4.0

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Respiration in Plants Test - 12

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Respiration in Plants Test - 12

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Question 1

Mitochondria

Cytoplasm

E.R.

Ribosomes

Solution

Question 2

Hydrogen

Electrons

Both A and B

Oxygen

Solution

Question 3

Fe

Zn

Mg

Mn

Solution

Question 4

Isomers

Polymers

Tautomers

Synonyms

Solution

Question 5

NADH

NADPH

FAD

$$FADH_2$$

Solution

Question 6

Resistance coefficient

Replicase concentration

Respiratory quotient

Reticular concentration

Solution

Question 7

TCA cycle

Calvin cycle

Terminal oxidation

Electron transport chain

Solution

Question 8

Cruickshank

Kostytchev

Pasteur

Buchner

Solution

Question 9

6

3

2

1

Solution

Question 10

CO$$_2$$ produced to substrate consumed

CO$$_2$$ produced to O$$_2$$ consumed

Oxygen consumed to water produced

Oxygen consumed to CO$$_2$$ produced.

Solution

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