Question

What is cell theory?

2. Write the name of the scientists who observed the cell for the first time.

3. State the function of nuclear membrane and chromatin.

4. Multiple choice questions:

A. Nucleus is separated from cytoplasm by

(a) nuclear membrane

(b) nucleoplasm

(c) organs

(d) cell membrane

B. Tissues combine to form

(a) nucleus

(b) cells

(c) organism

(d) organs

C. The coloured organelles which are found in plants only are

(a) chlorophyll

(b) plastids

(c) vacuoles

(d) WBC





D. The organism containing only a single cell is called

(a) unicellular organism

(b) multicellular organism

(c) organelle

(d) all of these

E. Genes are located in

(a) chromosomes

(b) plastids

(c) cytoplasm

(d) lysosome

F. Which organelle is called the “powerhouse of the cell”?

a. Nucleus

b. Endoplasmic reticulum

c. Mitochondrion

d. Golgi apparatus

G. Which among the following organelles synthesizes lipids?

a. Smooth Endoplasmic Reticulum

b. Rough Endoplasmic Reticulum

c. Golgi apparatus

d. Lysosome

H. Assertion (A): Chromosomes are responsible for the transfer of characteristics from parents to offspring.

Reason (R): Chromosomes are present in the nucleus.

a. Both A and R are true and R is the correct explanation of A

b. A is true but R is false

c. A is false but R is true

d. Both A and R are true but R is not the correct explanation of A

I. Choose the correct statement(s):

(i) Ribosomes are located on the chromosomes.

(ii) Cell is located in the nucleus.

(iii) Chloroplasts are located in the nucleolus.

(iv) Cell membrane surrounds the cell.

a. (i), (ii) and (iii)

b. (i) and (ii)

c. (iii) and (iv)

d. Only (iv)

J. Which of the following is the non-living part of the cell?

a. Cell membrane

b. Cytoplasm

c. Mitochondrion

d. Cell wall pls tell me full answer pls











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Answer 1

1. Cell theory is, "all the plants and animals are composed of cells and cell is the basic unit of life". It was said by Schwann and Schleiden.

2. Robert Hooke(1665) - observed dead cells

Anton Van Leeuwenhoek(1674) - observed living cells

3.Nuclear membrane seperates nucleus from cytoplasm. It has pores which allow the transfer of materials inside and outside the nucleus.

Chromatin stores the DNA as a part of it, when the cell is not dividing. It later gets organised into chromosomes when the cell divides.

4. A) a

B) d

C) b

D) a

E) a

F) c

G) a

H) d

I) d

J) d

Hope it helps