Tag: cell respiration

Questions Related to cell respiration

 Anaerobic respiration of animals/humans produces

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

  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

Show answer
Correct Option: C
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'.

Fermentation produces

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

  1. Protein and acetic acid

  2. Alcohol and lipoprotein

  3. Alcohol and lactic acid

  4. Ethers and acetones

Show answer
Correct Option: C
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'.

Fermentation is

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

  1. Anaerobic respiration

  2. Incomplete oxidation of carbohydrates

  3. Complete oxidation of carbohydrates

  4. None of the above

Show answer
Correct Option: A
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'

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

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

  1. Photorespiration.

  2. Lactate fermentation.

  3. Aerobic respiration.

  4. Alcoholic fermentation.

Show answer
Correct Option: D
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.'

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

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

  1. Pyruvate dehydrogenase

  2. Pyruvate decarboxylase

  3. Alcohol oxidase

  4. Alcohol dehydrogenase

Show answer
Correct Option: B
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'.

Ethanol is formed from acetaldehyde by an enzyme called

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

  1. Lactate dehydrogenase

  2. Pyruvate kinase

  3. Alcohol dehydrogenase

  4. Pyruvate decarboxylase

Show answer
Correct Option: C
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'.

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

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

  1. Aerobic respiration in animals.

  2. Alcoholic fermentation.

  3. Lactate fermentation.

  4. Aerobic respiration in plants.

Show answer
Correct Option: C
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'.

Pasteur effect can be studied in case of __________.

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

  1. Nostoc

  2. Penicillium

  3. Pinnularia

  4. Saccharomyces

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Correct Option: D

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.

Show answer
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

Show answer
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'.