G8-SANKALP90-FOUNDATION

Who discovered free-living cells in pond water?

• Robert Hooke

• Schleiden

• Schwann

• Anton van Leeuwenhoek

Assertion: Plasma membrane is called selectively permeable. Reason: Plasma membrane allows only selective substances to pass through it.

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

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

• A is true but R is false.

• A is false but R is true.

Which of the following is found in all cells?

• Nucleus

• Cell wall

• Plasma membrane

• Chloroplast

Match the following: A) Diffusion - i) Water movement B) Osmosis - ii) No energy required C) Active transport - iii) Energy required

• A-ii, B-i, C-iii

• A-iii, B-i, C-ii

• A-i, B-ii, C-iii

• A-ii, B-iii, C-i

The smallest structural and functional unit of life is called:

• Tissue

• Organ

• Cell

• Organ system

Who discovered the cell?

• Robert Hooke

• Anton van Leeuwenhoek

• Schleiden

• Schwann

The cell theory was proposed by:

• Hooke and Leeuwenhoek

• Schleiden and Schwann

• Virchow and Hooke

• Leeuwenhoek and Virchow

Assertion: The nucleus controls all cellular activities. Reason: The nucleus contains chromosomes with genetic material.

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

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

• A is true but R is false.

• A is false but R is true.

Refer to the provided plant cell diagram. Which part labelled 'Y' is responsible for providing structural support?

• Cell wall

• Nucleus

• Cytoplasm

• Plasma membrane

Which structure is selectively permeable?

• Nucleus

• Cell wall

• Plasma membrane

• Cytoplasm