Tag: biology

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

Which of the following is the respiratory product in plants?

  1. Glucose

  2. Carbon dioxide

  3. Oxygen

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

The process by which cells obtain chemical energy by the consumption of oxygen and the release of carbon dioxide is known as respiration. In order to carry on respiration, plant cells need oxygen and a means of disposing of carbon dioxide just as animal cells do. In plants, each part such as root, stem performs respiration because plants do not possess any specialized organs like animals for the exchange of gases. 

Glucose + Oxygen → Carbon Dioxide + Water (+ Energy)We can conclude same from the above equation as well that respiration uses oxygen and produces carbon dioxide.

So, the correct option is 'Carbon dioxide'.

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

The plants absorbs air for respiration from

  1. Air spaces in the soil

  2. Stomata in leaves

  3. Ovary

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

In plants respiration also takes place through roots. In soil oxygenated air is present in air spaces between soil particles. This oxygen is absorbed into the roots by root hair present on the roots. The hairs of the roots are in direct contact with them. In fact, a root hair is a lateral tubular outgrowth of the outer epidermal cells of a root. The oxygen present in between the soil particles diffuse into the root hairs. From root hairs, oxygen is supplied to all the parts of roots for respiration. During respiration, oxygen is converted into carbon dioxide gas which is diffused in opposite direction i.e. out of the roots by the same root hairs which complete the process of respiration in roots.

So, the correct option is 'Air spaces in the soil'.

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

During respiration in plants, the glucose is broken down into 

  1. Carbon dioxide

  2. Water

  3. Energy

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The process by which cells obtain chemical energy by the consumption of oxygen and the release of carbon dioxide is known as respiration. In order to carry on respiration, plant cells need oxygen and a means of disposing of carbon dioxide just as animal cells do. In plants, each part such as root, stem performs respiration because plants do not possess any specialized organs like animals for the exchange of gases.

The process of respiration is expressed as:

Glucose + Oxygen → Carbon Dioxide + Water (+ Energy)

So, the correct option is 'All of the above'.

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 biology concept of life living organism living vs nonliving living vs non living

An irreversible or permanent increase in size, mass or volume of a cell, organ or organism is called as ________.

  1. growth

  2. differentiation

  3. dedifferentiation

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

Growth is defined as a permanent or irreversible increase in thy weight, size, mass or volume of a cell, organ or organism.