In which of the following cellular compartment(s) do respiratory reactions occur ?

Cytoplasm and endoplasmic

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Mitochondria and Golgi complex

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Mitochondria and cytoplasm

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Mitochondria only

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Solution

The correct option is C Mitochondria and cytoplasm
Glycolysis, Krebs cycle and electron transport chain are three phases of cellular respiration. Glycolysis is the first phase of the respiratory reaction. It takes place in the cytoplasm. Krebs cycle is the second phase of the respiratory reaction. It takes place in the matrix of mitochondria. The last phase of the respiratory reaction, electron transport chain takes place in the inner membrane of the mitochondria.
Thus, the correct answer is option C.

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Q. Which of the following steps of the respiratory pathway occur in the cytoplasm?

Question 12
The correct sequence of anaerobic reactions in yeast is

(a) $G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e m i t o c h o n d r i a - ------- \to E t h a n o l + C a r b o n d i o x i d e$
(b) $G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e c y t o p l a s m - ----- \to L a c t i c a c i d$
(c) $G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e m i t o c h o n d r i a - ------- \to L a c t i c a c i d$
(d) $G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e c y t o p l a s m - ----- \to E t h a n o l + C a r b o n d i o x i d e$

Q. Do bacterium cell have mitochondria and lysosomes in their cytoplasm ?

Q. The correct sequence of anaerobic reactions in yeast is

(a)

G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e m i t o c h o n d r i a - ------- \to E t h a n o l + C a r b o n d i o x i d e

(b)

G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e c y t o p l a s m - ----- \to L a c t i c a c i d

(c)

G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e m i t o c h o n d r i a - ------- \to L a c t i c a c i d

(d)

G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e c y t o p l a s m - ----- \to E t h a n o l + C a r b o n d i o x i d e

Question 13
Which of the following is most appropriate for aerobic respiration?

(a) $G l u c o s e m i t o c h o n d r i a - ------- \to P y r u v a t e c y t o p l a s m - ----- \to C O_{2} + H_{2} O + E n e r g y$
(b) $G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e m i t o c h o n d r i a - ------- \to C O_{2} + H_{2} O + E n e r g y$
(c) $G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e + E n e r g y m i t o c h o n d r i a - ------- \to C O_{2} + H_{2} O$
(d) $G l u c o s e c y t o p l a s m - ----- \to P y r u v a t e + E n e r g y m i t o c h o n d r i a - ------- \to C O_{2} + H_{2} O + E n e r g y$

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