The correct sequence of anaerobic reactions in yeast is

$Glucose \overset{cytoplasm}{\to} Pyruvate \overset{mitochondria}{\to} Ethanol + Carbon dioxide$
$Glucose \overset{cytoplasm}{\to} Pyruvate \overset{cytoplasm}{\to} Lactic acid .$
$Glucose \overset{cytoplasm}{\to} Pyruvate \overset{mitochondria}{\to} Lactic acid .$
$Glucose \overset{cytoplasm}{\to} Pyruvate \overset{cytoplasm}{\to} Ethanol + carbon dioxide .$

Open in App

Solution

The correct option is D
$Glucose \overset{cytoplasm}{\to} Pyruvate \overset{cytoplasm}{\to} Ethanol + carbon dioxide .$

The correct option is D.
Explanation for correct option-
Anaerobic respiration is the process of breakdown glucose without the involvement of the oxygen. It releases less energy compared to aerobic respiration. It takes place in the yeast in two major steps:
In the first step, glucose is converted into pyruvate in the cytoplasm of the cell.
In the second step, pyruvate is converted to ethanol and carbon dioxide in the cytoplasm of the cell.
Explanation for incorrect options-
Option A:
The conversion of pyruvate to ethanol and carbon dioxide does not occur in the mitochondria of yeast.
Option B:
In yeast, anaerobic respiration results in the formation of ethanol and carbon dioxide as end-products. Lactic acid is produced as an end-product in the muscles of higher animals.
Option C:
Lactic acid is not an end-product of anaerobic respiration in yeast. Lactic acid is the product of anaerobic respiration in the muscles of higher animals.
Thus, the correct sequence of anaerobic reactions in yeast is:
. $Glucose \overset{Cytoplasm}{\to} Pyruvate \overset{Cytoplasm}{\to} Ethanol + Carbon dioxide$

Suggest Corrections

Similar questions

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. The correct sequence of anaerobic reactions in yeast is

Q. The correct sequence of anaerobic respiration in yeast is

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. What chemical reaction occurs during anaerobic respiration in yeast?

Join BYJU'S Learning Program

The correct sequence of anaerobic reactions in yeast isGlucose→cytoplasmPyruvate→mitochondriaEthanol+CarbondioxideGlucose→cytoplasmPyruvate→cytoplasmLacticacid.Glucose→cytoplasmPyruvate→mitochondriaLacticacid.Glucose→cytoplasmPyruvate→cytoplasmEthanol+carbondioxide.