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SESSION-2021-22
Class- X Subject- Science
Chapter-6
Assignment No.-II
Life processes (Nutrition in Animals)
I. Very short questions:-
Q.1. The temporary finger like extensions of the cell surface of Amoeba
which helps in taking food is called _____________
Q.2. What is the name of the body part of Amoeba in which the complex
substances are broken down into simpler ones?
II. Case study-
When we eat something we like, our mouth waters. This is actually not only
water but a fluid called saliva secreted by the salivary glands. The salivary
amylase is an enzyme present in saliva which breaks down starch into simple
sugar. It is necessary to move the food in a regulated manner along the
digestive tube so that it can be processed easily. The digestion in stomach is
taken care by gastric glands present in the wall of the stomach.
Q.1. Rhythmic movement of muscles in the lining of gut are known as-
(a) Contracting movements (b) Dilating movements
(c) Peristaltic movement (d) None of these
Q.2. Saliva contains which enzyme from the following-
(a) pancreatic amylase (b) lipase
(b) Salivary amylase (d) Trypsin
Q.3. Salivary amylase acts on-
(a) Amino acids (b) Starch (c) Fats (d) Both (a) & (b)
Q.4. After digestion proteins fats & carbohydrates are respectively converted
into-
(a) Glucose, fatty acids, glycerods (b) amino acid, fatty acids, glucose
(c) Glucose, amino acids, fatty acids (d) Fatty acids, glycerol, amino acids
III. Short questions-
Q.1. (a) What is the role of hydrochloric acid in our stomach?
(b) What is the function of enzymes in the human digestives system.
Q.2. (a) Which part of the body secretes bile? Where is bile stored? What is
the function of bile?
(b) What is trypsin? What is its function?
Q.3. What is emulsification?
IV. Short questions-
Q. Explain the digestion in stomach.
V. Long question.
Q. (a) Name all the digestive enzymes present in our digestive system.
(b) Explain the process of digestion of carbohydrates, fats & proteins.
(c) Why do people complain of acidity problems an consuming too much of
fats & proteins.
VI. Assertion & reasons type questions:-
Assertion:- In stomach food is digested with the help of HCl
Reason:- HCl help to kill the bacteria present in the food, stops the action of
saliva & provides acidic medium for the enzymes.
(a) If both the assertion & reason are true & reason is the correct explanation
of assertion.
(b) If both assertion & reason are true but reason is not the correct
explanation of assertion.
(c) If assertion is true but reason is false
(d) If assertion is false but reason is true
(a) If both the assertion & reason are true & reason is the correct explanation
of assertion.
(b) If both assertion & reason are true but reason is not the correct
explanation of assertion.
(c) If assertion is true but reason is false
(d) If assertion is false but reason is true
2. Assertion:- Bile does not contain any enzyme.
Reason:- Pancreas contain trypsin enzyme.
(a) If both the assertion & reason are true & reason is the correct explanation
of assertion.
(b) If both assertion & reason are true but reason is not the correct
explanation of assertion.
(c) If assertion is true but reason is false
(d) If assertion is false but reason is true.

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