Tag: biology

Questions Related to biology

Pseudopodia are

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. False feet developed in some unicellular organisms

  2. Small hairlike structures present on the unicellular organisms

  3. Long, tube like structure coming out of the mouth

  4. Suckers which are attached to the walls ofintestines

Show answer
Correct Option: A
Explanation:

Pseudopods which translates to "false feet" are temporary cytoplasm-filled parts of the cell wall that are able to change their form in order to move. They are used in some eukaryotic cells to move around or to eat. Most cells that do this are called as amoeboids. The Amoeba is a common example. Proboscis, cilia and tongue are absent in Amoeba. 

Therefore, the correct answer is option A.

Digestion within a digestive tract is

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Incomplete

  2. Extracellular

  3. The same as absorption

  4. Intracellular

Show answer
Correct Option: B
Explanation:
  • Extracellular digestion is a process in which saprobionts feed by secreting enzymes through the cell membrane onto the food.
  • The enzymes catalyze the digestion of the food into molecules small enough to be taken up by passive diffusion, transport or phagocytosis.
  • Intracellular digestion is a form of digestion wherein the breaking down of materials into smaller components takes place inside the cell.
  • An incomplete digestive system has only one opening. The food goes in the same opening that the waste comes out.

Therefore, the correct answer is option B.

Which begins at the buccal cavity and ends at the anus. The canal can be divided into compartments

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Six

  2. Three

  3. Four

  4. Two

Show answer
Correct Option: A
Explanation:

The digestive system consists of the alimentary canal or digestive tract and two accessory glands, the liver and the pancreas. The digestive tract can in turn be divided into oral cavity, pharynx, stomach, small intestine, large intestine and anus. 

Therefore, the correct answer is option A.

Stomach is present in organisms belonging to Cyclostomes.

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient

Show answer
Correct Option: B
Explanation:

Cyclostomes are jaw-less and eel like animals belonging to division: Agnatha. Their digestive system lack stomach.

The two systems of the human body which help in the control and co-ordination of metabolic activities are __________.

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Digestive and circulatory

  2. Respiratory and circulatory

  3. Excretory and skeletal

  4. Nervous and endocrine

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Correct Option: A

Digestion process in human is

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Extracellular

  2. Intracellular

  3. Intercellular

  4. Both (a) and (c)

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Correct Option: D

Cartilage matrix is digested during its osteogenesis through

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Intracellular autophagic activity

  2. Extracellular lysosomal activity

  3. Intracellular heterophagic activity

  4. Both B and C.

Show answer
Correct Option: B

Assertion  :  Trypsin helps in blood digestion of predator animals.

Reason  :    Trypsin hydrolyzes fibrinogen


biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  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

Show answer
Correct Option: A
Explanation:

Trypsin is protein digesting enzyme present in the intestine of animals. Though it cannot digest casein (a milk protein), in predator animals drinking the blood of their prey, trypsin hydrolyzes fibrinogen of blood into fibrin, leading to blood coagulation thus help in blood digestion. It also activates other pancreatic proteases.

Essentially the word digestion means

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Burning of food

  2. Oxidation of food

  3. Hydrolysis of food

  4. Breakdown of food

Show answer
Correct Option: D
Explanation:

Digestion is the breakdown of food into smaller components that can be more easily absorbed and assimilated by the body. These smaller substances are absorbed through the small intestine into the blood stream.

In humans, digestion is

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Intercellular

  2. Intracellular

  3. Extracellular

  4. Both A and B

Show answer
Correct Option: C