cell class 9

Question 1

What is the basic structural and functional unit of life?

Answer 1

Cell

Question 2

True or False: All living organisms are made up of cells.

Answer 2

True

Question 3

Fill in the blank: The __________ is the outermost boundary of a cell.

Answer 3

cell membrane

Question 4

What are the two main types of cells?

Answer 4

Prokaryotic and Eukaryotic

Question 5

Which type of cell lacks a true nucleus?

Answer 5

Prokaryotic cell

Question 6

What is the function of the nucleus in a cell?

Answer 6

It stores the cell’s genetic material (DNA).

Question 7

Multiple choice: Which of the following is NOT a part of a cell? A) Cytoplasm B) Cell wall C) Nucleus D) Ecosystem

Answer 7

D) Ecosystem

Question 8

What is the jelly-like substance found inside a cell called?

Answer 8

Cytoplasm

Question 9

True or False: Plant cells have a cell wall.

Answer 9

True

Question 10

What organelle is responsible for energy production in a cell?

Answer 10

Mitochondria

Question 11

Fill in the blank: The __________ is known as the powerhouse of the cell.

Answer 11

mitochondria

Question 12

What is the role of ribosomes in a cell?

Answer 12

They synthesize proteins.

Question 13

Multiple choice: Which structure is involved in the packaging and distribution of proteins? A) Golgi apparatus B) Lysosome C) Endoplasmic reticulum D) Nucleus

Answer 13

A) Golgi apparatus

Question 14

True or False: Lysosomes are known as the digestive system of the cell.

Answer 14

True

Question 15

What is the function of the cell membrane?

Answer 15

It regulates the entry and exit of substances in and out of the cell.

Question 16

Fill in the blank: The __________ is a network of protein filaments that helps the cell maintain its shape.

Answer 16

cytoskeleton

Question 17

What is the primary difference between plant and animal cells?

Answer 17

Plant cells have a cell wall and chloroplasts; animal cells do not.

Question 18

Multiple choice: Which organelle is responsible for photosynthesis? A) Chloroplast B) Mitochondria C) Ribosome D) Golgi apparatus

Answer 18

A) Chloroplast

Question 19

What is the role of the endoplasmic reticulum?

Answer 19

It synthesizes proteins and lipids.

Question 20

True or False: All cells have a nucleus.

Answer 20

False

Question 21

Fill in the blank: __________ are specialized structures within a cell that perform distinct functions.

Answer 21

Organelles

Question 22

What is the protective outer layer of a plant cell called?

Answer 22

Cell wall

Question 23

Multiple choice: Which organelle is involved in detoxification of drugs and poisons? A) Smooth ER B) Rough ER C) Ribosome D) Nucleus

Answer 23

A) Smooth ER

Question 24

What is the function of chloroplasts?

Answer 24

They convert light energy into chemical energy through photosynthesis.

Question 25

Fill in the blank: The __________ is a double membrane that surrounds the nucleus.

Answer 25

nuclear envelope

Question 26

What is the function of vacuoles in plant cells?

Answer 26

They store nutrients, waste products, and help maintain turgor pressure.