NCERT Class X Science Class: Chapter –6. Life Processer – Part-1

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Multiple Choice Questions

Question 1:

Which of the following statements about the autotrophs is incorrect?

(a) They synthesis carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll

(b) They store carbohydrates in the form of starch

(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight

(d) They constitute the first trophic level in food chains

Answer: C

Question 2:

In which of the following groups of organisms, food material is broken down outside the body and absorbed?

(a) Mushroom, green plants, Amoeba

(b) Yeast, mushroom, bread mould

(c) Paramecium, Amoeba, Cucuta

(d) Cucuta, lice, tapeworm

Answer: B

Image the Yeast, mushroom, bread mould

Image the Yeast, Mushroom, Bread Mould

Image the Yeast, mushroom, bread mould

Question 3:

Select the correct statement

(a) Heterotrophs do not synthesize their own food

(b) Heterotrophs utilize solar energy for photosynthesis

(c) Heterotrophs synthesize their own food

(d) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates

Answer: A

Image Heterotrophs do not synthesize their own food

Image Heterotrophs Do Not Synthesize Their Own Food

Image Heterotrophs do not synthesize their own food

Question 4:

Which is the correct sequence of parts in human alimentary canal?

(a)

(b)

(c)

(d)

Answer: D

Image parts in human alimentary canal

Image Parts in Human Alimentary Canal

Image parts in human alimentary canal

Question 5:

If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?

(a) Proteins breaking down into amino acids

(b) Starch breaking down into sugars

(c) Fats breaking down into fatty acids and glycerol

(d) Absorption of vitamins

Answer: B

Question 6:

The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct one

(a) Pepsin

(b) Mucus

(c) Salivary amylase

(d) Bile

Answer: B