Tag: respiration-the energy producing system

Quizzes (22) Questions (15)

Questions Related to respiration-the energy producing system

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

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

  1. 5%

  2. 10%

  3. 15%

  4. 2%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glycolysis is the initial stage of glucose breakdown, occurring in the cytoplasm. It yields a small amount of energy compared to the complete oxidation of glucose in the Krebs cycle and electron transport chain, accounting for approximately 5% of the total energy.

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

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 $H _2O$ 

  1. 4 PGAL 40 ATP

  2. 6 PGAL 120 ATP

  3. 4 PGAL 80 ATP

  4. 5 PGAL 160 ATP
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

One glucose molecule produces 2 PGAL (G3P) during glycolysis. Therefore, 3 glucose molecules produce 6 PGAL. The complete respiration of 6 PGAL (via Krebs cycle and ETC) yields 120 ATP (since 1 glucose yields 38 or 36 ATP, and 3 glucose yields roughly 114-120 ATP).

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

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

  1. True

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

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

The term respiration was given by

  1. Lavosier

  2. Dutrochet

  3. Sachs

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

Henri Dutrochet, a French physiologist who is known for his valuable works in animal and plant physiology coined the term 'respiration'. He also discovered and named the process of osmosis (passage of solvent through a semipermeable membrane) that occurs at cellular level in both plants and animals. 

So the correct answer is 'Dutrochet'.

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

Which of the following is not a reason that breathing air is easier than breathing water'?

  1. A given volume of air is easier to move across the respiratory organs than the same volume of water.

  2. Air holds more oxygen per unit volume than water.
  3. Water breathers have a difficult time ridding themselves of CO, because $CO _2$ does not dissolve well in water.
  4. Temperature increases affect the $O _2$ content of water more than they do that of air.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon dioxide dissolves very well in water, which is actually why water breathers can eliminate CO2 efficiently across their gills. Thus, the statement that CO2 does not dissolve well in water is incorrect, meaning it is not a reason why breathing air is easier than breathing water. In fact, the high solubility of CO2 in water creates challenges for aquatic animals to maintain low internal levels without continuous ventilation.

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

Name the scientist who demonstrated that breath is caused by the formation of carbon dioxide in blood. 

  1. Thomas Adams

  2. J Haldane

  3. J Priestley

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

In 1906, Haldane and Priestley discovered that respiratory reflex i.e. breath is caused by an excess of carbon dioxide in the blood and not by a lack of oxygen. They described the regulation of respiratory drive by carbon dioxide and its effects on blood hydrogen ion concentration The high ability of deoxygenated haemoglobin to bind with carbon dioxide was named as Haldane effect. Thus the correct answer is option B.

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

Who discovered oxygen gas?

  1. Priestley

  2. Erlich

  3. Chadwick

  4. Tansley
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Oxygen gas was discovered by the scientist Joseph Priestley in 1773. It is the most important gas responsible for the life on earth. It is produced by plants by the process of photosynthesis but consumed by the animals by the process of respiration.
So, the correct answer is 'Priestly'.
Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

Health man can inspire or expire approximately _________ ml of air per minute.

  1. $a = 9.8\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$
  2. $a = 5\ ml, b = 500\ ml, c = 12\ to \ 16, d = -3$
  3. $a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$
  4. $a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 18 times, d = 7$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A healthy adult typically has a tidal volume of about 500 ml and a respiratory rate of 12 to 16 breaths per minute. The total volume of air inspired or expired per minute (minute ventilation) is roughly 6000 to 8000 ml.