Tag: respiration in living organisms

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Questions Related to respiration in living organisms

Multiple choice biology respiration in living organisms breathing in plants mode of respiration in plants process of respiration

Which of the following is the main purpose of respiration in plants?

  1. Breaking of complex food into simple ones

  2. Production of energy

  3. Exchange of gases

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cellular respiration is the process by which cells in plants and animals break down sugar and turn it into energy, which is then used to perform work at the cellular level. The purpose of cellular respiration is simple, it provides cells with the energy they need to function. If living things could not get the energy they need out of food, it would be absolutely worthless. All living things would eventually die, no matter the quality and amount of food. Cellular respiration is used to create usable energy from the foods that living things eat. It's important to know that the reactions involved in cellular respiration are catabolic, meaning they break down molecules into smaller ones. This differs from anabolic reactions, which build bigger molecules from smaller ones. 

So, the correct option is 'Both A and B'.

Multiple choice biology respiration in living organisms breathing in plants mode of respiration in plants process of respiration

Which one of the following organism may respire in the absence of oxygen?

  1. Azotobacter

  2. Clostridium

  3. Rhizobium

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

Azotobacter is a genus of free-living nitrogen-fixing bacteria that are typically aerobic, but many organisms like Clostridium are obligate anaerobes. However, the question asks which 'may' respire in the absence of oxygen; Clostridium is a classic example of an obligate anaerobe, but Azotobacter is often cited in specific contexts of facultative or microaerophilic capability in curriculum materials.

Multiple choice biology respiration in living organisms breathing in plants mode of respiration in plants process of respiration

Consider the following statements.
a. Acetaldehyde is an electron acceptor during respiration
b. In Critic Acid Cycle, pyruvate is transported from cytosol to mitochondrial matrix
c. The Pentose Phosphate Pathway occurs in cytosol
Which of these statements are correct?

  1. $1, 2$ and $3$
  2. $1$ and $2$
  3. $2$ and $3$
  4. $1$ and $3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology respiration in living organisms breathing in plants mode of respiration in plants process of respiration

During respiration there is

  1. gain in dry weight

  2. loss in dry weight

  3. no change in dry weight

  4. increase in the overall weight
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During respiration, due to consumption of organic resources in the cell the dry weight decreases. In respiration, there is a loss in dry weight.

Hence, the correct answer is 'loss in dry weight'.

Multiple choice biology respiration in living organisms breathing in plants mode of respiration in plants process of respiration

Which of the following is incorrectly matched?

  1. $Protein \rightarrow$ Degraded by Proteases
  2. Fats $\rightarrow$ Fatty acid + Glycerol
  3. Kreb's cycle $\rightarrow$ Carboxylation
  4. Respiration Pathway $\rightarrow$ Amphibolic Pathway
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kreb's cycle involves decarboxylation and oxidation steps rather than carboxylation. Proteins are degraded by proteases, fats break down to fatty acids and glycerol, and respiration is widely recognized as an amphibolic pathway.

Multiple choice biology respiration in living organisms breathing in plants mode of respiration in plants process of respiration

Where do plant roots take up oxygen from?

  1. Atmospheric air

  2. Air spaces between soil particles

  3. Water in soil particles

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

Plant's roots are embedded into the soil. The soil has air spaces which allow the tip of the roots to take up oxygen and then this is transported to the other parts of the plant.

So the correct answer is 'Air spaces between the soil'.

Multiple choice zoology respiration in living organisms respiration in human beings respiration and associated structures respiration in humans

 A person breathing normally at rest, takes in and expels approximately half a litre of air during each respiratory cycle. This is called

  1. inspiratory reserve volume

  2. tidal volume

  3. expiratory reserve volume

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

The volume of air inspired or expired during normal breath is called tidal volume. It is about 500 mL of air in average young adult man.

Multiple choice zoology respiration in living organisms respiration in human beings respiration and associated structures respiration in humans

Heavy laboured and rapid breathing will result in which of the following?

  1. High ${CO _2}$ in blood
  2. High ${O _2}$ in atmosphere
  3. Low ${CO _2}$ in blood
  4. Low ${O _2}$ in blood
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heavy laboured breathing is a sign of abnormal respiration and an increased effort to breathe. Rapid breathing or Tachypnea has seen the breathing rate in adult humans is greater than the normal 20 breaths per minute. This  breathing pattern reduces carbon dioxide in the blood due to increased rate or depth of respiration.