Chapter 5: The Fundamental Unit of Life Assertion-Reason Questions | science Class 9 CBSE

ByteNotes

Chapter 5: The Fundamental Unit of Life Assertion-Reason Questions | science Class 9 CBSE | ByteNotes.in

Assertion-Reason

Check the statement and reason

A-R

Question 1

Logic Check

Assertion (A): Robert Hooke was the first to discover cells. Reason (R): He observed cork slices under a self-designed microscope in 1665.

Reasoning Options

ByteNotes

Assertion-Reason

Check the statement and reason

A-R

Question 2

Logic Check

Assertion (A): The cell is called the structural and functional unit of life. Reason (R): All living organisms are made up of one or more cells, and all functions occur within cells.

Reasoning Options

ByteNotes

Assertion-Reason

Check the statement and reason

A-R

Question 3

Logic Check

Assertion (A): Diffusion is a passive process. Reason (R): It occurs from a region of high concentration to a region of low concentration without energy use.

Reasoning Options

ByteNotes

Assertion-Reason

Check the statement and reason

A-R

Question 4

Logic Check

Assertion (A): Osmosis is a special case of diffusion. Reason (R): Osmosis refers specifically to the movement of water across a selectively permeable membrane.

Reasoning Options

ByteNotes

Assertion-Reason

Check the statement and reason

A-R

Question 5

Logic Check

Assertion (A): Hypertonic solution causes cells to shrink. Reason (R): In hypertonic solution, water moves out of the cell due to higher solute concentration outside.

Reasoning Options

ByteNotes

Assertion-Reason

Check the statement and reason

A-R

Question 6

Logic Check

Assertion (A): Plant cells can survive in hypotonic solutions. Reason (R): The rigid cell wall prevents bursting of cells in dilute media by exerting pressure.

Reasoning Options

ByteNotes

Assertion-Reason

Check the statement and reason

A-R

Question 7

Logic Check

Assertion (A): Plasma membrane is selectively permeable. Reason (R): It allows the movement of some substances but restricts others.

Reasoning Options

ByteNotes

Assertion-Reason

Check the statement and reason

A-R

Question 8

Logic Check

Assertion (A): Lysosomes are called the suicide bags of cells. Reason (R): They contain digestive enzymes which can destroy cell organelles during stress or damage.

Reasoning Options

ByteNotes

Assertion-Reason

Check the statement and reason

A-R

Question 9

Logic Check

Assertion (A): Mitochondria are known as the powerhouse of the cell. Reason (R): They release energy in the form of ATP during cellular respiration.

Reasoning Options

ByteNotes

Assertion-Reason

Check the statement and reason

A-R

Question 10

Logic Check

Assertion (A): Plastids are found only in plant cells. Reason (R): Plastids like chloroplasts are involved in photosynthesis, which only plants perform.

Reasoning Options

ByteNotes

Premium Access

Unlock all Assertion-Reason Questions

You are viewing 10 free assertion-reason questions from this chapter. Upgrade to Premium to unlock the remaining 20 questions.

Upgrade to Premium20 questions locked

Chapter sections

Chapter 5: The Fundamental Unit of Life | Assertion-Reason

Assertion (A): Robert Hooke was the first to discover cells. Reason (R): He observed cork slices under a self-designed microscope in 1665.

Assertion (A): The cell is called the structural and functional unit of life. Reason (R): All living organisms are made up of one or more cells, and all functions occur within cells.

Assertion (A): Diffusion is a passive process. Reason (R): It occurs from a region of high concentration to a region of low concentration without energy use.

Assertion (A): Osmosis is a special case of diffusion. Reason (R): Osmosis refers specifically to the movement of water across a selectively permeable membrane.

Assertion (A): Hypertonic solution causes cells to shrink. Reason (R): In hypertonic solution, water moves out of the cell due to higher solute concentration outside.

Assertion (A): Plant cells can survive in hypotonic solutions. Reason (R): The rigid cell wall prevents bursting of cells in dilute media by exerting pressure.

Assertion (A): Plasma membrane is selectively permeable. Reason (R): It allows the movement of some substances but restricts others.

Assertion (A): Lysosomes are called the suicide bags of cells. Reason (R): They contain digestive enzymes which can destroy cell organelles during stress or damage.

Assertion (A): Mitochondria are known as the powerhouse of the cell. Reason (R): They release energy in the form of ATP during cellular respiration.

Assertion (A): Plastids are found only in plant cells. Reason (R): Plastids like chloroplasts are involved in photosynthesis, which only plants perform.

Unlock all Assertion-Reason Questions