Tag: biology

Questions Related to biology

The sac like structure between the small intestine and the large intestine in ruminants is

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. Lumen

  2. Appendix

  3. Rumen

  4. Jejunum

Show answer
Correct Option: C
Explanation:

Rumen is a sac-like largest part of the stomach of the ruminants. It acts as a storage or holding vat for feed. It is also a fermentation vat.

So, the correct answer is 'Rumen'.

Which of the following is not a ruminant?

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. Cow

  2. Buffalo

  3. Dog

  4. Goat

Show answer
Correct Option: C
Explanation:
Ruminants are the mammals that have the ability to take nutrients from the plant-based food containing cellulose by fermenting it in a specialized stomach prior to digestion with the help of microbes. Dogs are not able to digest cellulose due to the lack of enzyme called cellulase and hence dogs are not ruminant.
So, the correct answer is 'Dog '.

The number of chambers in the stomach of ruminants is

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. 3

  2. 2

  3. 4

  4. 1

Show answer
Correct Option: C
Explanation:
Ruminants have 4 chambers of stomach which include:-
1) Rumen - sac-like pouch acts as a storage or holding vat for feed.
2) Reticulum - honeycomb shaped contain heavy or dense feed of the animal.
3) Omasum - globe-shaped structure, absorb water and other substance from digestive contents.
4) Abomasum- only component lined with glands that release digestive enzyme and hydrochloric acid.

Cellulose in plants can be digested by 

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. Pigeons

  2. Cows

  3. Cats

  4. Bears

Show answer
Correct Option: B
Explanation:
Cow has sac-like rumen which has bacteria that synthesize cellulase enzyme. This enzyme helps in the digestion of the cellulose containing grasses.
So, the correct answer is 'Cows'.

Why cannot ruminants chew food at the same time they take in?

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. Grass does not taste good.

  2. Grass contains cellulose that cannot be digested easily.

  3. The grass is hard in structure.

  4. Ruminants eat a lot of grass at the same time.

Show answer
Correct Option: B
Explanation:
Ruminants are the herbivores and eat grasses. Grasses contains cellulase as their stored food. Cellulose needs an enzyme called cellulase for its digestion which is present in the rumen. Ruminants do not chew their food at the same time they take in as they require the fermented cud to be regurgitated and chewed. 
So the correct answer is 'Grass contains cellulose that cannot be digested easily'.

The part of the stomach where a ruminant stores food is called as

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. Lumen

  2. Rumen

  3. Tubule

  4. Artery

Show answer
Correct Option: B
Explanation:
Rumen is a sac-like structure. It is the largest part of the stomach of ruminants. It is a part where food is stored, mechanically processed and exposed to bacteria that synthesize cellulase enzyme to break cellulose.
So, the correct answer is 'Rumen'.

The primary features of differentiation between ruminants and non-ruminants are the presence of which of the structure in ruminants?

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. 5 chambered stomach

  2. 4 chambered stomach

  3. 3 chambered stomach

  4. 1 chambered stomach

Show answer
Correct Option: B
Explanation:
Ruminants have 4-chambered stomach. The four chambers are namely rumen, reticulum, omasum and abomasum. Like other vertebrates, ruminants (including deer and cattle), are unable to digest plant material directly, because they have 4-chambered stomach for better digestion.
So the correct answer is '4-chambered stomach'.

The true stomach in cows is called as

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. Rumen

  2. Abomasum

  3. Lumen

  4. None of the above

Show answer
Correct Option: B
Explanation:
True stomach in cow is called abomasum. It is the only part of the ruminant's stomach that has glands, secreting acids and enzymes for digestion. It receives and digests food from omasum and pass it on to the small intestine.
So, the correct answer is 'Abomasum'.

Humans cannot digest cellulose like cattle do because

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. They have a smaller stomach.

  2. They do not have cellulose-digesting bacteria in their stomach.

  3. They do not consume cellulose.

  4. They have less digesting capacity than ruminants.

Show answer
Correct Option: B
Explanation:
Food is stored in the plants as cellulose. Cellulase is an enzyme synthesized by bacteria in stomach of ruminant which is used to digest cellulose. Humans do not have cellulase and hence they cannot digest cellulose.
So, the correct answer is 'They do not have cellulose-digesting bacteria on their stomach'.

The cud is brought back to the mouth during digestion in ruminants. This is called as

biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

  1. Ingestion

  2. Regurgitation

  3. Egestion

  4. Absorption

Show answer
Correct Option: B
Explanation:
Ruminants have 4-chambered stomach. Reticulum is a part of ruminant's stomach that allow the animal to regurgitate the cud, to reprocess particulate matter and chew the cud again.
So the correct answer is 'Regurgitation'.