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    The correct sequence of anaerobic respiration in yeast is

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    Question

    The correct sequence of anaerobic respiration in yeast is 

    AGlucose

    → cytoplasm Pyruvate → mitochondria

    Ethanol+CarbonDioxide

    BGlucose

    → cytoplasm Pyruvate → cytoplasm LacticAcid

    CGlucose

    → cytoplasm Pyruvate → mitochondria LacticAcid

    DGlucose

    → cytoplasm Pyruvate → cytoplasm

    Ethanol+CarbonDioxide

    Medium Open in App Solution Verified by Toppr

    Correct option is D)

    If oxygen is absent, many cells are still able to use glycolysis to produce ATP. Two ways this can be done are through fermentation and anaerobic respiration. Fermentation is the process by which the electrons and hydrogen ions from the NADH produced by glycolysis are donated to another organic molecule. Anaerobic respiration in yeast cells occurs when the glucose glycolytically converted to pyruvic acid in the cytoplasm, followed by conversion to ethanol and carbon dioxide which also happens in the cytoplasm.

    Hence the correct option is D.

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    स्रोत : www.toppr.com

    The correct sequence of anaerobic reactions in yeast is

    The correct sequence of anaerobic reactions in yeast is

    Byju's Answer Standard X Biology

    Respiration in Humans

    The correct s... Question

    The correct sequence of anaerobic reactions in yeast is

    Glucose→cytoplasmPyruvate→mitochondriaEthanol + Carbon dioxide

    Glucose→cytoplasmPyruvate→cytoplasm Lactic acid.

    Glucose→cytoplasmPyruvate→mitochondria Lactic acid.

    Glucose→cytoplasmPyruvate→cytoplasm Ethanol +carbon dioxide.

    Open in App Solution

    The correct option is D

    Glucose→cytoplasmPyruvate→cytoplasm 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→CytoplasmPyruvate→Cytoplasm Ethanol +Carbon dioxide

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    SIMILAR QUESTIONS

    Q.

    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 −−−−−−→ P y r u v a t e m i t o c h o n d r i a −−−−−−−−→ 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 −−−−−−→ P y r u v a t e c y t o p l a s m −−−−−−→ 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 −−−−−−→ P y r u v a t e m i t o c h o n d r i a −−−−−−−−→ 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 −−−−−−→ P y r u v a t e c y t o p l a s m −−−−−−→ E t h a n o l + C a r b o n d i o x i d e

    Q. 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 −−−−−−→ P y r u v a t e m i t o c h o n d r i a −−−−−−−−→ 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 −−−−−−→ P y r u v a t e c y t o p l a s m −−−−−−→ 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 −−−−−−→ P y r u v a t e m i t o c h o n d r i a −−−−−−−−→ 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 −−−−−−→ P y r u v a t e c

    स्रोत : byjus.com

    The correct sequence of anaerobic respiration in yeast is (a) $Glucose \\ \\xrightarrow{Cytoplasm} \\ Pyruvate \\ \\xrightarrow{Mitochondria} \\ Ethanol \\ + \\ Carbon \\ dioxide$(b) $Glucose \\ \\xrightarrow{Cytoplasm} \\ Pyruvate \\ \\xrightarrow{Cytoplasm} \\ Lactic \\ Acid$(c) $Glucose \\ \\xrightarrow{Cytoplasm} \\ Pyruvate \\ \\xrightarrow{Mitochondria} \\ Lactic \\ Acid$(d) $Glucose \\ \\xrightarrow{Cytoplasm} \\ Pyruvate \\ \\xrightarrow{Cytoplasm} \\ Ethanol \\ + \\ Carbon \\ dioxide$

    The correct sequence of anaerobic respiration in yeast is (a) $Glucose \\ \\xrightarrow{Cytoplasm} \\ Pyruvate \\ \\xrightarrow{Mitochondria} \\ Ethanol \\ + \\ Carbon \\ dioxide$(b) $Glucose \\ \\xrightarrow{Cytoplasm} \\ Pyruvate \\ \\...

    The correct sequence of anaerobic respiration in yeast is

    (a) Glucose − → − − − − − Cytoplasm Pyruvate − → − − − − − − − Mitochondria

    Ethanol + Carbon dioxide

    Glucose →Cytoplasm Pyruvate →Mitochondria Ethanol + Carbon dioxide

    (b) Glucose − → − − − − − Cytoplasm Pyruvate − → − − − − − Cytoplasm Lactic Acid

    Glucose →Cytoplasm Pyruvate →Cytoplasm Lactic Acid

    (c) Glucose − → − − − − − Cytoplasm Pyruvate − → − − − − − − − Mitochondria Lactic Acid

    Glucose →Cytoplasm Pyruvate →Mitochondria Lactic Acid

    (d) Glucose − → − − − − − Cytoplasm Pyruvate − → − − − − − Cytoplasm

    Ethanol + Carbon dioxide

    Glucose →Cytoplasm Pyruvate →Cytoplasm Ethanol + Carbon dioxide

    Answer Verified 226.5k+ views 2 likes

    Hint: Through the process of fermentation, some kinds of cells may release energy. An anaerobic respiration mechanism is accompanied by yeast. In the gelatinous substance that fills the cell, this happens. Alcohol is one of their end products.Complete answer:

    Fermentation requires glycolysis (responsible for the production of two pyruvic acid molecules from hexose sugar molecules such as glucose), but not the other parts of cellular aerobic respiration. Glycolysis is accompanied by one of two mechanisms during fermentation: the pyruvate produced breaks down, depending on the organism, to become either lactate or alcohol.

    When muscles work hard, they require more oxygen in larger animals such as vertebrates than the body can provide. Mitochondrial action shuts down when the oxygen runs out. However, in the cytoplasm, glycolysis proceeds to break down glucose into molecules of pyruvate. The pyruvate molecules break down to form lactate in the absence of oxygen.

    A different fermentation method is carried out by microorganisms. Most foods are available due to the fermentation process carried out by microorganisms. The flavors of various cheeses, in which their fermentation produces lactate, are responsible for several different bacteria. Yeasts often break down fermentation sugars, but carbon dioxide (which we use to raise bread) and ethanol are the end products. This form of fermentation enables us, for instance, to produce wine from grapes. Traditionally, the fermentation of grains has been used for producing beer. More recently, it also provides us with new fuels for our internal combustion engines, replacing the need for fossil-fuel gasoline.

    So, the correct answer is, ‘(d)

    Glucose − → − − − − − Cytoplasm Pyruvate − → − − − − − Cytoplasm Ethanol + Carbon dioxide

    Glucose →Cytoplasm Pyruvate →Cytoplasm Ethanol + Carbon dioxide

    ’.

    Note: The catabolic process is respiration, which releases energy retained in the food. It can be either anaerobic or aerobic. Aerobic respiration occurs in the mitochondria in the presence of oxygen, while anaerobic respiration occurs in the cytoplasm in the absence of oxygen. Lactic acid fermentation, which takes place in higher animal muscles, and alcoholic fermentation, which is carried out by unicellular species such as yeast, are two significant forms of anaerobic respiration. In the cytoplasm, yeast anaerobically breaks down pyruvic acid into ethanol and carbon dioxide. In the process of glycolysis, pyruvic acid is formed in the cytoplasm.

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