Respiration in Plants Test

Result

Respiration in Plants Test - 14

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The pyruvic acid formed during glycolysis is oxidised to $${CO}_{2}$$ and $${H}_{2}O$$ in a cycle called

A
Calvin cycle

B
Nitrogen cycle

C
Hill reaction

D
Krebs' cycle

Solution

The pyruvic acid formed during glycolysis is oxidised to $$CO_{2}$$ and $$H_{2}O$$ in a cycle called Krebs' cycle. It was named after the scientist Hans Krebs who first elucidated it in flight muscles of pigeon. In these reactions, hydrogen atoms are removed from the acetyl CoA and transferred to the coenzyme for further processing in the electron transport system. The cycle is also called Citric Acid cycle (CAC, because of the formation of citric acid in the first step of this cycle) or TCA cycle (because many intermediate compounds formed in the cycle have three carboxyl groups). The reactions of the Krebs cycle require the presence of oxygen and are confined to mitochondrial matrix. This cycle serves as a common oxidative pathway for carbohydrates, fats and proteins.
Question 2
1 / -0

Kerbs cycle __________________.

A
Liberates a minor part of energy during respiration

B
Is operative in photorespiration

C
Reactions are independent of oxygen supply

D
Is a like between carbohydrate and nitrogen metabolism
Question 3
1 / -0

Choose the correct answers from the alternatives given :
In certain organisms and under certain conditions, which of the following can be used as an energy alternative to glucose

A
fatty acids

B
glycerol

C
amino acids

D
all of these
Solution
- in certain conditions such as starvation when sufficient amount of glucose is not present in the blood the foremost priority of the body is to provide brain with the sufficient amount of glucose.
- So for the other body parts the energy that is to be provided can be done by the use of other substrates instead of glucose.
- First alternative of glucose is fatty acid which is stored in the body. These fatty acid molecules are converted to acetyl coA by the process of beta oxidation and used in the kerbs cycle to provide the cell with energy.
- Glycerol is also a fatty acid which is used as the other fatty acid in the kerbs cycle.
- Amino acids are the part of protein molecules which are usually not stored in the body but can be used in the kerbs cycle whenever they are provided to the cell.
- Therefore the answer 'all of these' is correct.
Question 4
1 / -0

Link reaction between glycolysis and Krebs cycle is

A
Pyruvate Acetyl CoA

B
PGAL 1 : 3 diPGA

C
Citric acid Isocitric acid

D
Malate OAA

Solution

Glycolysis and Krebs' cycle are linked by a reaction in which pyruvate is converted to acetyl CoA through the pyruvate dehydrogenase complex. It is an oxidative decarboxylation reaction.
So the answer is 'Pyruvate Acetyl CoA'.
Question 5
1 / -0

In Yeast, anaerobic respiration produces

A
$$CO_2$$ and ethanol

B
$$CO_2$$ and water

C
$$O_2$$ and lactic acid

D
$$O_2$$ and pyruvic acid

Solution

Yeast can undergo both aerobic respiration or anaerobic respiration. In anaerobic respiration, glucose is utilized and carbon dioxide and ethanol are formed. It is also called as alcoholic fermentation. In aerobic respiration, water and carbon dioxide are produced.
Thus, the correct answer is option A.
Question 6
1 / -0

Production of alcohol by yeast fermentation is

A
Anaerobic

B
Aerobic

C
Light dependent

D
Both A and C

Solution

Yeast fermentation is a type of anaerobic respiration in which the substrate is oxidised in absence of oxygen. The intermediate product is acetaldehyde and final products are ethyl alcohol and CO$$_2$$. It is also known as alcoholic fermentation. So the answer is 'Anaerobic'.
Question 7
1 / -0

Identify enzyme A in the given reaction of Krebs' cycle.
$$\underset{(4C)}{OAA}+Acetyl-CoA+{H}_{2}O\xrightarrow{A}\underset{(6C)}{Citric \,acid}+CoA$$

A
Oxaloacetate synthetase

B
Citrate synthase

C
Aconitase

D
Dehydrogenase

Solution

Citrate synthase catalyzes the condensation reaction of the two-carbon acetate residue from acetyl coenzyme A and a molecule of four-carbon oxaloacetate to form the six-carbon ciitrate. It is the reaction of Krebs' cycle.
Acetyl-CoA + oxaloacetate + H$$_2$$O → Citrate + CoA-SH.
Thus, the correct answer is 'Citrate synthase.'
Question 8
1 / -0

Select the correct opation:
Pyruvic acid, the key product of glycolysis can have many metabolic fates. Under aerobic condition it forms

A
lactic acid

B
$${CO}_{2}+{H}_{2}O$$

C
$$acetyl \,CoA+{CO}_{2}$$

D
$$ethanol+{CO}_{2}$$

Solution

The correct answer is (c).
Question 9
1 / -0

What is the similarity between glycolysis and Krebs cycle?

A
Formation of intermediate $$5C$$compound

B
Substrate level phosphorylation

C
Oxidative phosphorylation

D
Decarboxylation.

Solution

Answer is option B i.e. "Substrate level phosphorylation"
Substrate-level phosphorylation is a metabolic reaction that results in the formation of ATP by the direct transfer of a phosphoryl (PO3) group to ADP from another phosphorylated compound. Substrate level phosphorylation occurs in glycolysis and Krebs cycle.
While decarboxylation, formation of intermediate 5C compound and oxidative phosphorylation occurs only in Kreb's cycle.
Question 10
1 / -0

In order for glucose to be used as an energy source, it is necessary that

A
Glucose be formed from fructose

B
Glucose be degraded to CO$$_2$$

C
2 molecules of ATP be invested in the system

D
None of these

Solution

In order to utilize glucose as energy, it is not necessary that the glucose is formed from fructose. Four ATP molecules are generated after glycolysis, but the net gain of glycolysis is two. This is because 2 ATP molecules are used in the first half process of glycolysis. Hence, for glycolysis to take place, 2 ATP molecules are necessary.
Thus, the correct answer is '2 molecules of ATP be invested in the system.'

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Respiration in Plants Test - 14

Result

Respiration in Plants Test - 14

Score

-

Rank

-

SHARING IS CARING

Question 1

Calvin cycle

Nitrogen cycle

Hill reaction

Krebs' cycle

Solution

Question 2

Liberates a minor part of energy during respiration

Is operative in photorespiration

Reactions are independent of oxygen supply

Is a like between carbohydrate and nitrogen metabolism

Question 3

fatty acids

glycerol

amino acids

all of these

Solution

Question 4

Pyruvate Acetyl CoA

PGAL 1 : 3 diPGA

Citric acid Isocitric acid

Malate OAA

Solution

Question 5

$$CO_2$$ and ethanol

$$CO_2$$ and water

$$O_2$$ and lactic acid

$$O_2$$ and pyruvic acid

Solution

Question 6

Anaerobic

Aerobic

Light dependent

Both A and C

Solution

Question 7

Oxaloacetate synthetase

Citrate synthase

Aconitase

Dehydrogenase

Solution

Question 8

lactic acid

$${CO}_{2}+{H}_{2}O$$

$$acetyl \,CoA+{CO}_{2}$$

$$ethanol+{CO}_{2}$$

Solution

Question 9

Formation of intermediate $$5C$$compound

Substrate level phosphorylation

Oxidative phosphorylation

Decarboxylation.

Solution

Question 10

Glucose be formed from fructose

Glucose be degraded to CO$$_2$$

2 molecules of ATP be invested in the system

None of these

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.