General Science 6th Class Chapter 1 Cellular Organization Solved Exercise

 General Science

6th Class

Chapter 1

Cellular Organization

Questions

1.1 Encircle the correct option.

1. An animal cell has:

a. single vacuole        b. two vacuoles        c. many vacuoles        d. no vacuole

2. Mitochondria are the cell organelles that play role in:

a. protein synthesis        b. food production

c. producing energy from food        d. removing waste products

3. Chromosomes are present in:

a. chloroplast        b. nucleus        c. cell wall        d. vacuole

4. Cell membrane is composed of:

a. proteins and lipids        b. cellulose and lipids

c. cellulose and proteins        d. lipids

5. Chlorophyll is a pigment whose colour is:

a. red        b. blue        c. yellow        d. green

6. Human skin is made of:

a. muscle tissue        b. blood tissue        c. epidermal tissue        d. epithelial tissue

7. Oxygen is carried from lungs and supplied to the whole body by:

a. white blood cells        b. red blood cells        c. platelets        d. bone cells

8. Site for respiration in a cell is:

a. nucleus        b. endoplasmic reticulum        c. chloroplast        d. mitochondria

9. Water is conducted from roots to leaves by:

a. xylem        b. phloem        c. epidermis        d. mesophyll

10. Kidneys perform functions related to:

a. digestive system        b. breathing system        c. circulatory system        d. excretory system

1.2 Give short answers.

1. Name the cell organelle that controls the whole cell activity.

Ans.

Nucleus controls the whole body activities.

2. Write the function of blood in human body.

Ans.

Blood circulates throughout the body to transport materials from one past of the body to another.

3. Enlist the organs involved in blood circulatory system in man.

Ans.

Following organs are involved in blood circulatory system. Heart, arteries, veins and capillaries.

4. Name the red coloured pigment present in red blood cells.

Ans.

Haemoglobin is present in red blood cells.

1.3 Differentiate between:

1. Animal cell and plant cell

Ans.

Animal cell

i. It has no cell wall.

ii. It has many small vacuoles.

iii. Animal cell has no chloroplast.

Plant cell

i. It has a cell wall.

ii. It has a single large vacuole.

iii. It has chloroplast.

2. Cytoplasm and nucleoplasm

Ans.

Cytoplasm

The jelly like material present inside the cell membrane is known as cytoplasm. Most of the cell functions take place here.

Nucleoplasm

The material inside the nucleus is called nucleolus plasma. It consists on thread like structure.

3. Xylem and phloem

Ans.

4. Epidermal tissue and epithelial tissue

Ans.

5. Root system and shoot system in plants

Ans.