Organelles

Q. Why Nucleus is called as the brain of the cell?

Q. The part of the cell which gives shape and rigidity to the cell is .

1. cytoplasm
2. protoplast
3. nucleus
4. cell wall

Q. The jelly-like fluid substance present in the cell is called ______.

1. vacuole
2. chloroplast
3. chromosome
4. cytoplasm

Q. Question 33
Observe the following diagram given as figure.

Answer the following questions.

A. Does it represent a plant cell or an animal cell?

B. Does it represent a prokaryotic cell or an eukaryotic cell?

Q. What do you understand by semi-autonomous cell organelles?

Q.

Which cell organelle controls most of the activities of the cell?

Q.

Why do humans not have a cell wall?

Q.

How is division of labour done in the cells of living organisms

Q.

What is cytology?

1. (a) Study of cytoplasm

2. (b) Study of structure and composition of cell

3. (c) Study of animal cell only

4. (d) Study of cell only

Q. Microtubules are absent in

1. Mitochondria
2. Flagella
3. Spindle fibres
4. Centriole

Q.

What is the structural organization of the cell?

Q.

Can a cell survive without a nucleus?

Q. Sarthak made slides of two specimens A and B. After carefully examining the nucleus, he observed:

	Specimen A	Specimen B
Well-defined nucleus	Present	Absent
Nuclear membrane	Present	Absent

Based on the information given in the table, identify the specimens A and B.

1. Muscle cell, Cheek cell
2. Blue-green algae, Rhoeo cell
3. Muscle cell, Bacterial cell
4. Cheek cell, Rhoeo cell

Q. Name the process by which amoeba engulfs food particles

1. Phagocytosis
2. Peristalsis
3. Exocytosis
4. Amoebiosis

Q. Which of the following defines the boundary of human cheek cells?

1. Cytoplasm
2. Cell membrane
3. Cell wall
4. Nucleus

Q. Why the nuclear membrane is called semi permeable membrane?

Q. Name any two organelles present in a cell.

Q.

_______________ controls all the metabolic activities of the cell.

Q. What is pseudopodia ?

Q.

Cells can only come from existing cells.

1. Colourless

2. Transparent

Q.

5. Which structure is called little nucleus ?

Q.

The jelly-like fluid substance present in cells is called:

1. protoplasm

2. chromosome

3. chloroplast

4. cytoplasm

Q.

What is the function of plastids and vacuoles.

Q.

Which of the following cell organelles break-down organic matter?

1. Nucleus
2. Lysosome
3. Endoplastic reticulum
4. Mitochondria

Q. What is the nucleoplasm made up of?

Q.

Structures present inside the cell which carry out specific functions are called___________.

1. cell membrane

2. organelles

3. prokaryotes

4. cell wall

Q.

Question 42
Name the cell organelles which can be compared to the following:

(a) Transporting channels of the cell

(b) Power house of the cell

(c) Packaging and dispatching unit of the cell

(d) Digestive bag of the cell

(e) Storage sacs of the cell

(f) Kitchen of the cell

(g) Control room of the cell

Q.

What is cell organelle , where are they found in a cell , give few examples of it .

Q. What is the major function of vacuoles?

1. Controls the cell
2. Disposes waste products
3. Transports proteins
4. Modifies proteins

Q. The cytoplasm and nucleus are enclosed within the cell membrane, also called the ________.

1. cell wall
2. tissues
3. plasma membrane
4. none of these