Consider the following chemical reactions which take place in different organisms/tissues under various conditions
(i) Glucose $R e s p i r a t i o n - ------ \to$ Ethanol + Carbon dioxide + Energy
(ii) Glucose $R e s p i r a t i o n - ------ \to$ Carbon dioxide + Water + Energy
(iii) Glucose $R e s p i r a t i o n - ------ \to$ Lactic acid + Energy

(a) Name one organism which respires according to equation (i)above.
(b) Name one organism which respires according to equation (ii) above.

(c) When and where does respiration represented by equation (iii) above take place?
(d) Which equation/equations represent aerobic respiration?
(e) Which equation/equations represent anaerobic respiration?
(f)Which of the above reactions produces the maximum amount of energy?

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Solution

(a)Yeast
(b)Man
(c)In animal's muscles; When the animals needs extra energy for doing heavy physical activity
(d) (ii)
(e) (i) and (iii)
(f) (ii)

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Q. Consider the following chemical reactions which take place in different organisms/tissues under various conditions:
(i) Glucose

\overset{Respiration}{\to}

Ethanol + Carbon dioxide + Energy
(ii) Glucose

\overset{Respiration}{\to}

Carbon dioxide + Water + Energy
(iii) Glucose

\overset{Respiration}{\to}

Lactic acid + Energy
(a) Name one organism which respires according to equation (i) above.
(b) Name one organism which respires according to equation (ii) above.
(c) When and where does respiration represented by equation (iii) above take place?
(d) Which equation/equations represent aerobic respiration?
(e) Which equation/equations represent anaerobic respiration?
(f) Which of the above reactions produces the maximum amount of energy?

Q. Given below are chemical reactions ( 1 to 5) involving glucose and five other chemical products (A-E).
(a) Write the reaction number of the following:
(i) Anaerobic respiration in plants.
(ii) End-products in aerobic respiration.
(iii) Reaction occurring in liver.
(iv) Anaerobic respiration in animals.
(v) Storage in the liver.
(b) Which reactions (1-5) in the above correspond to the following (write the corresponding number of reaction next to them).
(i) Aerobic respiration.
(ii) Change taking place in the liver.
(iii) Anaerobic respiration in yeast.
(iv) Change taking place in a plant storage organ – e.g. potato.
(v) Anaerobic respiration in animals.

During the respiration of an organism A, 1 molecule of glucose produces 2 ATP molecules whereas, in the respiration of another organism B, 1 molecule of glucose produces 38 ATP molecules.
(a) Which organism is undergoing aerobic respiration?
(b) Which organism is undergoing anaerobic respiration?
(c) Which type of organism, A or B, can convert glucose into alcohol?
(d) Name one organism which behaves like A.
(e) Name two organisms which behave like B.

Complete the following equation of respiration by selecting the correct option:

Glucose + $(i) - - -$ $\to$ Water + $(i i) - -- -$ + Energy

What does the following equation represent
$G l u c o s e + 2 N A D^{+} + 2 A D P + 2 H_{3} P O_{4} \to 2 p y r u v a t e + 2 N A D H + 2 H^{+} + 2 A T P$

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(a)Yeast (b)Man (c)In animal's muscles; When the animals needs extra energy for doing heavy physical activity (d) (ii) (e) (i) and (iii) (f) (ii)

(a)Yeast
(b)Man
(c)In animal's muscles; When the animals needs extra energy for doing heavy physical activity
(d) (ii)
(e) (i) and (iii)
(f) (ii)