Tag: nutrition in other organisms

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Questions Related to nutrition in other organisms

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

Which of the following is responsible for partial digestion in the mouth of ruminants?

  1. High intake of cellulose

  2. High intake of lactose

  3. High intake of glucose

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Ruminants eat plant materials that contain cellulose. High intake of cellulose is responsible for partial digestion in the mouth. This partial digestion of cellulose is called cud. It is digested partially in the mouth by the process of regurgitation.
So the correct answer is 'High intake of cellulose'.
Multiple choice biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

Assertion    :  Rumen of alimentary canal of ruminant
                        animals harbour numerous bacteria and
                           protozoa

Reason      :    Bacteria and protozoa help in the secretion
                        of gastric juice in the rumen.


  1. If both the assertion and the reason are true and the reason

    is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is

    not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ruminant animals such as cattle, buffalo, sheep, goat and camel have a compound stomach, which consists of four chamber, viz, rumen, reticulum, omasum and abomasum. Rumen is the first and the largest of the four chambers. Rumen and reticulum harbour numerous bacteria and protozoa, which carry out extensive fermentation of cellulose. So, these two chambers function as sites for cellulose digestion in ruminants. The gastric juice containing enzymes and HCl is secreted only by the fourth chamber i.e., Abomasum.

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

In ruminant stomach, the rumen is the

  1. Largest chamber

  2. Chamber having cellulose fermenting microorganisms

  3. Chamber having villi with cornified surface

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

The rumen is the largest chamber of the ruminant stomach and contains a complex ecosystem of microorganisms that ferment cellulose.

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

Ptyalin cannot work in stomach, because it be comes _____________.

  1. Inactive due to HCl

  2. Inactive due to Renin

  3. Inactive due to Pepsin

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

Ptyalin (salivary amylase) functions in an alkaline or neutral environment. When it reaches the stomach, the highly acidic environment created by HCl denatures the enzyme, rendering it inactive.

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

During cellulose fermentation by anaerobic bacteria in rumen and reticulum, cellulose is mainly changed into.

  1. $CO _2$

  2. Ethyl alcohol

  3. Lactic acid

  4. Volatile fatty acids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cellulose is broken down to short chain fatty acids in ruminants ,during cellulose fermentation by anaerobic bacteria.

Correct answer-D

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


Which of the following animals has compound stomach (rumen)?

  1. dog

  2. rat

  3. horse

  4. cow
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ruminants include cattle, sheep, goats, buffalo. These animals all have a digestive system that is uniquely different from our own. Instead of one compartment to the stomach, they have four. Of the four compartments, the rumen is the largest section and the main digestive center

So, the correct answer is 'Cow'

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

Which of the following is the stomach part in which herbivores secretes the grass which is swallowed quickly? 

  1. Lumen

  2. Pyloric

  3. Rumen

  4. Ileum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vertebrates lack the ability to hydrolyse the beta glycosidic bond of plant cellulose due to the lack of the enzyme cellulase. Thus, ruminants must completely depend on the microbial flora, present in the rumen or hindgut, to digest cellulose. Digestion of food in the rumen is primarily carried out by the rumen microflora. Since, the environment inside a rumen is anaerobic, most of these microbial species are obligate or facultative anaerobes that can decompose complex plant material, such as cellulose, hemicellulose, starch, and proteins. As bacteria conduct fermentation in the rumen, they consume approximately 10% of the carbon, 60% of the phosphorus, and 80% of the nitrogen that the ruminant ingests. To reclaim these nutrients, the ruminant then digests the bacteria in the abomasum. The enzyme lysozyme has adapted to facilitate digestion of bacteria in the ruminant abomasum. Pancreatic ribonuclease also degrades bacterial RNA in the ruminant small intestine as a source of nitrogen. 

Therefore, the correct answer is option C.