Tag: fermentation

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Questions Related to fermentation

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

 Anaerobic respiration of animals/humans produces

  1. Glucose and O$ _2$
  2. C$ _2$H$ _5$OH and CO$ _2$

  3. Lactic acid and water
  4. CO$ _2$ and H$ _2$O
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cellular respiration in animals is predominantly aerobic in nature. However in stressful conditions, the respiration turns anaerobic to meet the energy demands. End products of anaerobic respiration are lactic acid and water. End products in plants for aerobic respiration are alcohol and carbon dioxide.

So the answer is 'Lactic acid and water'.

Multiple choice biology life processes in living organisms- part 1 fermentation cell respiration living organisms and energy production

Fermentation produces

  1. Protein and acetic acid

  2. Alcohol and lipoprotein

  3. Alcohol and lactic acid

  4. Ethers and acetones
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fermentation is a type of anaerobic respiration that occurs in both plants and animals in the absence of oxygen. The end product is ethyl alcohol in plants and lactic acid in animal cells along with release of CO$ _2$ and energy. Fermentation is not as much energy yielding as aerobic respiration.

So the answer is 'Alcohol and lactic acid'.

Multiple choice biology life processes in living organisms- part 1 fermentation cell respiration living organisms and energy production

Fermentation is

  1. Anaerobic respiration

  2. Incomplete oxidation of carbohydrates

  3. Complete oxidation of carbohydrates

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fermentation is a type of anaerobic respiration in which the breakdown of glucose takes place to release acids, alcohols and other gases in absence of oxygen. It takes place in the cytoplasm.

It involves glycolysis which is the breakdown of glucose to form pyruvic acid which can undergo two different pathways to form the lactic acid or ethanol and carbon dioxide.
So, the correct option is 'Anaerobic respiration'

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

Select suitable name for the process
C$ _6$H$ _{12}$O$ _6$ + 2ADP + Pi 2C$ _2$H$ _5$OH + CO$ _2$ + 2ATP

  1. Photorespiration.

  2. Lactate fermentation.

  3. Aerobic respiration.

  4. Alcoholic fermentation.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The given process is alcoholic respiration and 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.

So the correct option is 'Alcoholic fermentation.'

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

For formation of ethanol, pyruvic acid is first changed to acetaldehyde by enzyme

  1. Pyruvate dehydrogenase

  2. Pyruvate decarboxylase

  3. Alcohol oxidase

  4. Alcohol dehydrogenase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Alcoholic fermentation employs the conversion of pyruvic acid to ethanol for the release of energy. This is an incomplete oxidation in which aldehyde is first formed as an intermediate which is then further oxidised to alcohol. Pyruvic acid to acetaldehyde conversion is brought about by pyruvate decarboxylase which releases CO2.

So the answer is 'Pyruvate decarboxylase'.

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

Ethanol is formed from acetaldehyde by an enzyme called

  1. Lactate dehydrogenase

  2. Pyruvate kinase

  3. Alcohol dehydrogenase

  4. Pyruvate decarboxylase
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Alcoholic fermentation occurs in the absence of O2 and is a type of anaerobic respiration in which the end products are CO2 and alcohol. Aldehyde is an intermediate product in fermentation and is further oxidised to alcohol with the help of an enzyme called dehydrogenase. So ethanol is formed from acetaldehyde with the help of alcohol dehydrogenase.

Hence the answer is 'Alcohol dehydrogenase'.

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

In which one of the following processes CO$ _2$ is not released

  1. Aerobic respiration in animals.

  2. Alcoholic fermentation.

  3. Lactate fermentation.

  4. Aerobic respiration in plants.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In lactic acid fermentation which occurs in the absence of oxygen like fermentation after glycolysis form lactate which gets deprotonated to form lactic acid while in fermentation acetaldehyde converts into alcohol by deprotonation of it.

As lactate does not contain any oxygen in it that is the reason at the end carbon dioxide is not formed.
So the correct option is 'Lactate fermentation'.

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

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

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.'

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

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

  1. 2 + 2

  2. 3 + 3

  3. 4 + 4

  4. 6 + 6
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.