MEDIUM
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Statement I: NADH is oxidised to NAD+ rather slowly in fermentation and very vigorously in aerobic respiration.

Statement II: In aerobic respiration, only glucose is oxidised, no other alternative substrates enter in the pathway.

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Important Questions on Respiration in Plants

EASY
Why is there a difference in the rate of breathing between aquatic organisms and terrestrial organisms? Explain.
EASY
Assertion (A): Respiratory pathway is amphibolic pathway.
Reason (R): Respiratory pathway is involved in both anabolism and catabolism.
HARD

For the Amphibolic pathway, choose the correct option of true assertions from the given assertions. 

(I) Lipid enters the first stage of the respiratory pathway.

(II) The conversion of carbohydrates into glucose, before their entry into respiration is not compulsory.

(III) Protein enters into the respiratory pathway in the form of Pyruvic acid.

(IV) Oxidation and formation of lipid and protein, these two events take place.

EASY
Forced deep breathing for a few minutes by a person sitting at rest may be followed by a temporary cessation of breathing. This is due to
MEDIUM

Respiration in plants is different from respiration in animals with this regard, which statement is not suitable?

(P) Parts of plants performs respiration independently.

(Q) There is little transport of gas from one part to another in plant.

(R) Respiration in plants occurs at much slower rate than in animal.

(S) Respiration in animals occurs at much slower rate than in plants.

MEDIUM
Which gas is used in aerobic respiration-
MEDIUM
Choose the correct statements regarding entry of substrates into respiratory pathway.
A) The amino acids will be formed by protease activity on proteins.
B) Carbohydrates will be converted into glucose for entry.
C) Amino acids will enter as pyruvate or acetyl COA.
D) Fatty acids will be entered as PGAL.
EASY
Distinguish between breathing and respiration (any two points).
HARD

Find out where transketolase and epimerase reactions occur among the following:

i) G-3-P+DHAP Fructose -1-6- bisphosphate

ii) Sedoheptulose- 7- Phosphate +G-3-P Xylulose -5-P+ Ribose -5- Phosphate

iii) Ribose -5- Phosphate Ribulose -5- Phosphate

iv) Xylulose -5 -Phosphate  Ribulose-5 - Phosphate

v) Fructose - 6 -Phosphate +G-3-P Xylulose- 5 -Phosphate + Erythrose -4-Phosphate

The correct combination is

MEDIUM
What is meant by cellular respiration? Write what happens in cells in the presence or in the absence of oxygen.
EASY
Exhaled air has more carbon dioxide than inhaled air.
MEDIUM
Enumerate the three basic properties associated with a surface functioning as a respiratory surface.
EASY
In pentose phosphate pathway which process is lacking
EASY
Cellular respiration is an anabolic process.
MEDIUM
Why do fish continuously gulp water?
EASY
What will happen if fish are taken out of water? Explain with reason.
MEDIUM

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

EASY
What is the major similarity between respiration and combustion?
MEDIUM
Write the characteristic features of a good respiratory surface.