10th cbse The Human Eye and the Colourful World QUIZ

Science MCQ Test

Life Processes & Human Eye

Answer all questions and submit to see the correct answers.

1. The kidneys in human beings are a part of the system for

(a) Nutrition (b) Respiration (c) Excretion (d) Transportation

Correct Answer: (c) Excretion

2. The xylem in plants is responsible for

(a) Transport of water (b) Transport of food (c) Transport of amino acids (d) Transport of oxygen

Correct Answer: (a) Transport of water

3. The autotrophic mode of nutrition requires

(a) Carbon dioxide and water (b) Chlorophyll (c) Sunlight (d) All of the above

Correct Answer: (d) All of the above

4. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in

(a) Cytoplasm (b) Mitochondria (c) Chloroplast (d) Nucleus

Correct Answer: (b) Mitochondria

5. The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to

(a) Presbyopia (b) Accommodation (c) Near sightedness (d) Far sightedness

Correct Answer: (b) Accommodation

6. The human eye forms the image of an object at its

(a) Cornea (b) Iris (c) Pupil (d) Retina

Correct Answer: (d) Retina

7. The least distance of distinct vision for a young adult with normal vision is about

(a) 25 m (b) 2.5 cm (c) 25 cm (d) 2.5 m

Correct Answer: (c) 25 cm

8. The change in focal length of eye lens is caused by action of

(a) Pupil (b) Retina (c) Ciliary muscles (d) Iris

Correct Answer: (c) Ciliary muscles

9. Which of the following statements about the autotrophs is incorrect?

(a) They synthesise 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

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

10. 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, Cuscuta (d) Cuscuta, lice, tapeworm

Correct Answer: (b) Yeast, mushroom, bread mould

11. Select the correct statement

(a) Heterotrophs do not synthesise their own food (b) Heterotrophs utilise solar energy for photosynthesis (c) Heterotrophs synthesise their own food (d) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates

Correct Answer: (a) Heterotrophs do not synthesise their own food

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

(a) Mouth → Stomach → Small intestine → Oesophagus → Large intestine (b) Mouth → Oesophagus → Stomach → Large intestine → Small intestine (c) Mouth → Stomach → Oesophagus → Small intestine → Large intestine (d) Mouth → Oesophagus → Stomach → Small intestine → Large intestine

Correct Answer: (d) Mouth → Oesophagus → Stomach → Small intestine → Large intestine

13. 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

Correct Answer: (b) Starch breaking down into sugars

14. The inner lining of stomach is protected from hydrochloric acid by which of the following?

(a) Pepsin (b) Mucus (c) Salivary amylase (d) Oesophagus

Correct Answer: (b) Mucus

15. Which part of alimentary canal receives bile from the liver?

(a) Stomach (b) Small intestine (c) Large intestine (d) Oesophagus

Correct Answer: (b) Small intestine