Tag: respiration in plants

Questions Related to respiration in plants

Three major ways for metabolism of pyruvic acid produced in glycolysis are

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. Lactic acid fermentation, alcoholic fermentation and aerobic respiration.

  2. Oxaloacetic acid fermentation, lactic acid fermentation, aerobic fermentation.

  3. Alcoholic fermentation, oxaloacetic acid fermentation, citric acid fermentation.

  4. Citric acid fermentation, lactic acid fermentation, alcoholic fermentation.

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Correct Option: A
Explanation:

Glycolysis the common pathway of lactic acid fermentation, alcoholic fermentation and aerobic respiration in which glucose is converted into pyruvic acid in a multi-step reaction which includes ten major steps involve various enzymes.

So the correct option is 'Lactic acid fermentation, alcoholic fermentation and aerobic respiration.'

In alcoholic fermentation, two molecules of glucose produce ethanol and CO$ _2$ respectively

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. 2 + 2

  2. 3 + 3

  3. 4 + 4

  4. 6 + 6

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Correct Option: C
Explanation:

 Alcoholic respiration is done by the yeast in which two molecules of ATP, carbon dioxide and alcohol is released and the process takes place in the absence of oxygen.

$C _6H _{12}O _6 + 2ADP\rightarrow Pi  2C _2H _5OH + CO _2 + 2ATP$
If 2 ATP and $C _2$ is released by molecule. So two glucose will release 4 ATP and $ $CO_2$.
So the correct option is '4 + 4'.

Lactic acid is produced in the process of

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. Fermentation.

  2. HMP.

  3. Krebs cycle.

  4. Glycolysis.

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Correct Option: A
Explanation:

Fermentation of carbohydrates such as glucose, lactose, sucrose produces lactic acid.

So the correct option is 'Fermentation.'

The incomplete breakdown of sugars in anaerobic respiration results in the formation of 

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. Fructose and water

  2. Glucose and $CO _{2}$

  3. Alcohol and $CO _{2}$

  4. Water and $CO _{2}$

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Correct Option: C
Explanation:

Anaerobic respiration involves the incomplete breakdown of glucose. It releases around 5% of the energy released by aerobic respiration, per molecule of glucose. In yeast it can be observed, as alcoholic fermentation. A biological process in which molecules such as glucose, fructose, and sucrose are converted into cellular energy and thereby produce ethanol and carbon dioxide as metabolic waste products.

In anaerobic respiration, acetaldehyde is reduced to form alcohol by utilising $NADH _2$ obtained from

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. Glycolysis

  2. Terminal oxidation

  3. Krebs cycle

  4. Acetylation

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Correct Option: A
Explanation:

Anaerobic respiration starts with the process of glycolysis. The NADH2 thus formed from glycolysis are used to further oxidise acetaldehyde to form alcohol and CO2. The NAD formed are then recycled back to be used in glycolysis.

So the answer is 'Glycolysis'.

In anaerobic respiration of muscles, pyruvic acid is changes to.

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. Alcohol

  2. Acetaldehyde

  3. Acetyl CoA

  4. Lactic acid

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Correct Option: D

Lactic acid is converted into alcohol in a process called as

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. Fermentation

  2. Aerobic respiration

  3. Respiration

  4. Photosynthesis

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Correct Option: A
Explanation:

Fermentation is a process used to produce wine, beer, yogurt etc. Yeast performs fermentation to obtain energy by converting sugar into alcohol. Alcoholic fermentation also referred to as ethanol fermentation, is a biological process in which molecules such as glucose, fructose, and sucrose are converted into cellular energy and thereby produce ethanol and carbon dioxide as metabolic waste products.

Conversion of pyruvic acid into ethyl alcohol is facilitated by enzyme(s)

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. Carboxylase

  2. Phosphatase

  3. Dehydrogenase

  4. Decarboxylase and dehydrogenase

Show answer
Correct Option: D
Explanation:
When the pyruvic acid converts into alcohol in the presence of enzymes by bacteria and also exhibited by some in the lack of oxygen.
$2CH _3COOH\rightarrow2CH _3CHO+2CO _2$ is takes place in the presence of decarboxylase which removes carbon dioxide
$2CH _3CHO+2 NADH _2\rightarrow2C _2H _5OH+2NAD$ is takes place in the presence of alcohol dehydrogenase.
So the correct option is 'Decarboxylase and dehydrogenase'.

During lactic acid fermentation

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. $O _{2}$ is used and $CO _{2}$ is liberated

  2. Neither $O _{2}$ is used, nor $CO _{2}$ is liberated

  3. $O _{2}$ is used, but $CO _{2}$ is not liberated

  4. None of the above

Show answer
Correct Option: B
Explanation:

Lactic acid fermentation is a biological process by which glucose and other six-carbon sugars are converted into cellular energy and the metabolite lactate. It is an anaerobic fermentation reaction, that occurs in muscle cells. There is no liberation of carbon dioxide in this process.

Which molecule listed below is a product of fermentation of glucose by yeast?

biology respiration in plants fermentation cell respiration living organisms and energy production

  1. $C _{6}H _{10}O _{5}$

  2. $C _{2}H _{5}OH$

  3. $C _{6}H _{12}O _{6}$

  4. $CH _{3}OH$

Show answer
Correct Option: B
Explanation:

Beer and wine are produced by fermenting glucose with yeast. Yeast contains enzymes, that catalyze the breakdown of glucose to ethanol and carbon dioxide.