1.In which mode of nutrition an organism de-rives its food from the body of another living organism without killing it?
(a) Saprotrophic nutrition
(b) Parasitic nutrition
(c) Holozoic nutrition
(d) Autotrophic nutrition

Answer: b

2. The mode of nutrition found in fungi is:
(a) Parasitic nutrition
(b) Holozoic nutrition
(c) Autotrophic nutrition
(d) Saprotrophic nutrition

Answer (c )

the mode of nutrition found in fungi is saprotrophic nutrition.

3. The site of photosynthesis in the cells of a leaf is
(a) chloroplast
(b) mitochondria
(c) cytoplasm
(d) protoplasm

Answer. (a) chloroplastThe process of photosynthesis takes place in the chloroplasts, using

chlorophyll, the green pigment involved in photosynthesis.

 4.In amoeba, food is digested in the:
(a) food vacuole
(b) mitochondria
(c) pseudopodia
(d) chloroplast

Answer. (a) food vacuole

 Food vacuole is formed when food is engulfed through phagocytosis.

5.The contraction and expansion movement of the walls of the food pipe is called:
(a) translocation
(b) transpiration
(c) peristaltic movement
(d) digestion

Answer. (c)

Peristalsis Is the Contraction of Muscle Tissue That Helps Move and Break Down Foodstuffs

6. . When a few drops of iodine solution are added to rice water, the solution turns blue- black in colour. This indicates that rice water contains:
(a) fats
(b) complex proteins
(c) starch
(d) simple proteins

Amylose in starch is the main factor for colour formation as iodine comes in contact with beta coils structure of amylose and gives blue – black colour with iodine. Thus, the reaction of iodine with rice water indicates that rice water contains starch.

7. The exit of unabsorbed food material is regu-lated by
(a) liver
(b) anus
(c) small intestine
(d) anal sphincter

(d) anal sphincter

Anal sphincter regulates the unabsorbed food , which releases it in small amounts into the small intestine.

8. The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d) nucleus

Answer.

(b) mitochondriaThe break down of pyruvate to give carbon dioxide, energy and water takes place in the presence of oxygen and is termed as aerobic respiration. This process takes place in the mitochondria of a cell

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

 (a)  nutrition.

(b)  respiration.

(c)  excretion.

(d)  transportation.

Ans. (c) excretion.

Excretion refers to removal of metabolic waste from body. This makes kidneys part of excretory system.

10.  The xylem in plants are responsible for

     (a)  transport of water.

     (b)  transport of food.

     (c)  transport of amino acids.

     (d) transport of oxygen.

    Ans. (a) transport of water.

The role of xylem tissue in plants is to transport water and minerals.

11.  The autotrophic mode of nutrition requires

         (a)  carbon dioxide and water.

          (b)  chlorophyll.

          (c)  sunlight.

          (d)  all of the above.

Ans. (d) All of the above.

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

          (a)  cytoplasm.

          (b)  chloroplast.

          (c) mitochondria.

(d)  nucleus.

Ans. (c) mitochondria.

The break down of pyruvate to give carbon dioxide, energy and water takes place in the presence of oxygen and is termed as aerobic respiration. This process takes place in the mitochondria of a cell.

 13.Name the pores in a leaf through which respi-ratory exchange of gases takes place.

(a) Lenticels
(b) Vacuoles
(c) Xylem
(d) Stomata

Answer.

(d) Stomata

The pore through which the exchange of respiratory gases takes place is known as stomata. These are the tiny pores that are mainly found under the surfaces of the leaves, epidermis, stems etc.

14.Which plant tissue transports water and min-erals from the roots to the leaf?
(a) Xylem
(b) Phloem
(c) Parenchyma
(d) Collenchyma

Answer. XylemXylem tissue transports water and nutrients from the roots to different parts of the plant, and also plays a

role in structural support in the stem.

15. The movement of food in phloem is called:
(a) transpiration
(b) translocation
(c) respiration
(d) evaporation

Answer. (b) translocation

The transport of food in plants is called translocation. It takes place with the help of a conducting tissue called phloem. Phloem transports glucose, amino acids and other substances from leaves to root, shoot, fruits and seeds.

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