Respiration in Plants Test

Result

Respiration in Plants Test - 8

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
4 / -1

Respiratory substrates are the organic substances which are ________ during respiration to liberate energy.

A
Oxidised

B
Reduced

C
Synthesised

D
Both (a) and (b)

Solution

Respiration is an oxidative process in which repiratory substrates are oxidised to liberate energy inside the living cells. The common respiratory substrates are carbohydrates, proteins, fats and organic acids. The most common respiratory substrates are carbohydrates, proteins, fats and organic acids. The most common respiratory substrate is glucose.
Question 2
4 / -1

Respiratory quotient may be represented as

A
O₂ taken in/CO₂ evolved

B
CO₂ evolved/O₂ taken in

C
O₂taken in

D
CO₂ taken in

Solution

During aerobic respiration O₂ is consumed and CO₂ is released. The ratio of the volume of CO₂ evolved to the volume of O₂ consumed in respiration over a period of time is called as respiratory quotient (RQ) or respiratory ratio.
The respiratory quotient depends upon the type of respiratory substrate used during respiration.
(i) When carbohydrates are used as substrate and are completely oxidized the RQ will be 1, because equal amounts of CO₂ and O₂ are evolved and consumed respectively.
(ii) When proteins are respiratory substrates, the ratio would be about 0.9.
Question 3
4 / -1

If the volume of CO₂ liberated during respiration is more than the volume of O₂ used the respiratory substances will be

A
Carbohydrate

B
Fat

C
Protein

D
Organic acid

Solution

RQ slightly more than unity is found when organic acids are broken down as respiratory substrates under aerobic conditions, e.g., for breakdown of oxalic acid,
Question 4
4 / -1

Value of R.Q. in succulents is _________.

A
Unity

B
Infinite

C
Less than unity

D
Zero

Solution

Succulents do not evolve carbon dioxide during the night (when their stomata are open) as the same is in carbon fixation. They also change carbohydrates to organic acids which utilise oxygen but do not evolve carbon dioxide.
Question 5
4 / -1

RQ in anaerobic respiration is?

A
0.7

B
0.9

C
Unity

D
Infinity

Solution

In anaerobic respiration, there is no consumption of oxygen and carbon dioxide is produced in most of the cases. Therefore, respiratory quotient is infinity. Carb the usual substarte.
Question 6
4 / -1

Instantaneous source of energy is _______.

A
Proteins

B
Fats

C
Nucleic acids

D
Glucose

Solution

Glucose is a monomer that after ingestion, does not gets digested and directly gets absorbed and converted into energy. Therefore, glucose is an instantaneous source of energy.
Protein, fats, and nucleic acid don't get directly converted into energy. So, they are not the instantaneous source of energy.
Question 7
4 / -1

Refer the given equation.
2(C₅₁H₉₈O₆) + 145O₂ → 102CO₂ + 98H₂O + Energy
The RQ in this case is

A
1

B
0.7

C
1.45

D
1.62

Solution

When facts are used in respiration, the RQ is less than 1, e.g. for the breakdown of tripalmitin,
Question 8
4 / -1

Match Column-I with Column-II and select the correct option using the codes given below :

A
A - (ii), B - (iv), C - (iii), D - (i)

B
A - (ii), B - (i), C - (iv), D - (iii)

C
A - (iv), B - (iii), C - (ii), D - (i)

D
A - (iv), B - (ii), C - (iii), D - (i)
Question 9
4 / -1

Respirometer is an instrument used to measure

A
Rate of respiration

B
Respiratory quotient

C
Both of these

D
None of these

Solution

Respirometer is an instrument used for measuring rate of respiration and respiratory quotient.
Question 10
4 / -1

Complete the following biochemical equation of respiration and select the correct answer.

A
6CO₂ + 12H₂O Energy

B
12CO₂ + 4H₂O + Energy

C
12CO₂ + 6H₂O + Energy

D
6CO₂ + 6H₂O + Energy

Solution

Aerobic respiration is a chemical reaction in which glucose gets oxidise and converted into carbon dioxide and water. The following is the balanced chemical reaction -
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy.