MEDIUM
9th CBSE
IMPORTANT
Earn 100

State the postulates of cell theory?

Important Questions on The Fundamental Unit of Life

MEDIUM
9th CBSE
IMPORTANT
Do you agree that “A cell is a basic unit of an organism?”
MEDIUM
9th CBSE
IMPORTANT

In a project work, the onion peel slide was prepared by Ajay, which he stained with
(i) iodine solution and then second slide he stained with 
(ii) methylene blue.
He observed that different regions got different colours.

Why there was the need to stain the peel?

MEDIUM
9th CBSE
IMPORTANT

In a project work, the onion peel slide was prepared by Ajay, which he stained with
(i) iodine solution and then second slide he stained with 
(ii) methylene blue.
He observed that different regions got different colours.

Can he use both stains as a replacement of each other?

MEDIUM
9th CBSE
IMPORTANT
In project work, the onion peel slide was prepared by Ajay, which he stained with
(i) iodine solution and then the second slide he stained with 
(ii) methylene blue.
He observed that different regions got different colours.
Why do different regions of the slide got coloured differently?
MEDIUM
9th CBSE
IMPORTANT

In a project work, the onion peel slide was prepared by Ajay, which he stained with

(i) iodine solution and then second slide he stained with 

(ii) methylene blue.

He observed that different regions got different colours.

What values are shown by Ajay?

MEDIUM
9th CBSE
IMPORTANT
What are the three major functional regions of the cell?
MEDIUM
9th CBSE
IMPORTANT
Plasma membrane is called a selectively permeable membrane. Why?
EASY
9th CBSE
IMPORTANT
Who proposed the fluid mosaic model of the cell membrane? (Antonie van Leeuwenhoek /Singer and Nicolson)