Tag: anaerobic respiration in organisms

Questions Related to anaerobic respiration in organisms

The respiration carried in the absence of oxygen is called

biology the respiratory system anaerobic respiration in organisms anaerobic and aerobic respiration cellular respiration

  1. Aerobic respiration

  2. Anaerobic respiration

  3. Mastication

  4. Haemoglobin respiration

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Correct Option: B
Explanation:

  • In anaerobic respiration, glucose breaks down without oxygen.
  •  The chemical reaction transfers energy from glucose to the cell.
  •  Anaerobic respiration produces lactic acid, rather than carbon dioxide and water. Hence, The respiration carried in the absence of oxygen is called anaerobic respiration.
So, the correct answer is 'anaerobic respiration'.

In anaerobic respiration

biology the respiratory system anaerobic respiration in organisms anaerobic and aerobic respiration cellular respiration

  1. O$ _{ 2 }$ is taken in.

  2. CO$ _{ 2 }$ is taken in.

  3. O$ _{ 2 }$ is given out.

  4. CO$ _{ 2 }$ is given out.

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Correct Option: D
Explanation:

Anaerobic respiration is a type of respiration that does not use oxygen. It is used when there is not enough oxygen for aerobic respiration. 
Anaerobic respiration in some microorganisms (such as yeast) produces ethanol and carbon dioxide, as opposed to lactic acid.

So, the correct answer is option D.

Which of the following will survive in a closed container and perform fermentation?

biology the respiratory system anaerobic respiration in organisms anaerobic and aerobic respiration cellular respiration

  1. Algae

  2. Yeast

  3. Virus

  4. Protozoa

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Correct Option: B
Explanation:

  • Yeasts are eukaryotic, single-celled microorganisms classified as members of the fungus kingdom.
  •  Yeast is a microorganism that can undergo aerobic as well as anaerobic respiration. 
  • Yeast requires oxygen for growth. In addition to oxygen, they require a basic substrate such as sugar. 
When yeast cells are kept in an anaerobic environment (i.e., without oxygen)can ferment sugars to alcohol and carbon dioxide. They produce ethyl alcohol and carbon dioxide from simple sugars such as glucose and fructose. Hence, the yeast can survive in a closed container and perform fermentation.
So, the correct answer is 'yeast'.

The organisms that undergo anaerobic respiration to make alcohol are

biology the respiratory system anaerobic respiration in organisms anaerobic and aerobic respiration cellular respiration

  1. Bacteria

  2. Yeast

  3. Algae

  4. Protozoa

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Correct Option: B
Explanation:
Yeast can undergo both aerobic and anaerobic respiration. Anaerobic respiration occurs in yeast in the absence of oxygen. It is also known as fermentation. The products of anaerobic respiration in yeast are carbon dioxide, alcohol and 2 molecules of ATP.
So the correct answer is 'Yeast'.

ATP is stored on the myosin cross bridges for immediate energy After 5 to 6 seconds, this supply is exhausted and the muscle must rely on to quickly produce more ATP.

biology the respiratory system anaerobic respiration in organisms anaerobic and aerobic respiration cellular respiration

  1. Phosphocreatine

  2. Lactic acid

  3. Acetyl choline

  4. Pyruvic acid

Show answer
Correct Option: B
Explanation:

  • Myofibril activity is required for muscle contraction on the molecular level. 
  • When ATP binds to myosin, it separates from the actin of the myofibril, which causes a contraction.
  • The muscle contraction cycle is triggered by calcium ions binding to the protein complex troponin, exposing the active-binding sites on the actin.
  • ATP then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.
  • When ATP is exhausted lactic acid is produced 
So, the correct option is 'lactic acid'.

During strenuous exercise glucose is converted into.

respiration-the energy producing system anaerobic respiration in organisms anaerobic and aerobic respiration cellular respiration

  1. Glycogen

  2. Pyruvic acid

  3. Starch

  4. Lactic acid

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Correct Option: D

Glycolysis yields approximately ___ percent of the total energy of glucose.

respiration-the energy producing system anaerobic respiration in organisms anaerobic and aerobic respiration cellular respiration

  1. 5%

  2. 10%

  3. 15%

  4. 2%

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Correct Option: A

How many PGAL are produced by glycolysis of three molecules of glucose? How many ATP are released by respiration of these PGAL till formation of $CO _2$ and $H _2O$ 

respiration-the energy producing system anaerobic respiration in organisms anaerobic and aerobic respiration cellular respiration

  1. 4 PGAL 40 ATP

  2. 6 PGAL 120 ATP

  3. 4 PGAL 80 ATP

  4. 5 PGAL 160 ATP

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Correct Option: B

State whether the following statements are true or false.
Obligate anaerobes are killed by molecular oxygen.

respiration-the energy producing system anaerobic respiration in organisms anaerobic and aerobic respiration cellular respiration

  1. True

  2. False

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Correct Option: A
Explanation:

Obligate means restricted to the particular environment so the anaerobes that grow and multiply in the absence of molecular oxygen and are not able to survive in the presence of oxygen.

So, the correct option is 'True'.