All about Cells

Q.

Why is the cell called the structural and functional unit of life?

Q.

Who discovered cells first , Robert Hooke or Leeuwenhoek , was it living or dead cell

Q.

Why is the cell called the structural and functional unit of life ?

Q. Why is cell called the fundamental unit of life?

1. Cells cannot be broken into smaller components.
2. Cells are the smallest unit which is said to be living.
3. Cells are made up of water.
4. Cells are found in all the organisms.

Q.

Do you think the cells of an elephant would be larger than the cells of a rat ? Explain briefly.

Q.

What are the characteristics of cell?

Q.

Mention any three differences between a living cell and a brick in a wall.

Q.

Why cells are generally small in size?

Q.

Give the steps involved in preparing a slide of onion cells to be viewed under a microscope.

Q.

Define the following terms :

(a) Cell inclusions

(b) Cytosol

(c) Protoplasm

(d) Nucleoplasm

Q.

What is the difference between
(a) cell and tissue ?
(b) organ and organism?
(c) organ and organelle?
(d) organ and organ system?

Q.

All the plants and animals are composed of cells and the cell is the basic unit of life. Which theory states this?

Q.

Question 37
If you are provided with some vegetables to cook. You generally add salt into the vegetables during cooking process. After adding salt, vegetables release water. What mechanism is responsible for this?

Q. Statement 1: All cells arise from pre-existing cells.
Statement 2: All cells have a cell wall.

1. Both the statements are correct.
2. Only statement 1 is correct.
3. Only statement 2 is correct.
4. Both the statements are incorrect.

Q.

How is a bacterial cell different from an onion peel cell?

Q. Are there any exceptions in the Cell theory proposed by Schleiden, Schwann and Virchow? If yes, what are those? [3 MARKS]

Q. Assertion [A]: Majority of the cells cannot be seen directly with the naked eye.

Reason [R]: All the cells are microscopic in size.

1. Only A is correct
2. Only R is correct
3. Both A and R are correct, and R is the correct explanation for A
4. Both A and R are correct, but R is not the correct explanation for A

Q. WHO DISCOVERED THE FIRST LIVING CELL ?
A. REBERT HOOKE
B. LEEUWENHOEK

Q.

Write short notes on the following (a) Cytoplasm and (b) Nucleus.

Q.

Who coined the term 'protoplasm'?

Q.

Cells have a __(large / small) surface area for greater diffusion of substances in and out of cell.

Q.

What is the unit of measurement of cells

Q.

What did Rudolf Virchow do in the discovery of cells?

Q.

5. Describe an activity to observe cheek cells under a microscope.

Q.

Why is cell called functional and structural unit of life?

Q. What is the shape of onion peel cell ?

Q.

Why is the Cell called the structural and functional unit of life/building blocks of life?

(this is a 3 marker, therefore I require One point for why its called "structural", another point for functional, and another point for building blocks of life.)

Q. Select the correct order of direction of light passing through the microscope.

1. Light source → Condenser and Mirror → Specimen → Objective lens → Intermediate image → Eyepiece lens → Human eye
2. Light source → Specimen → Condenser and Mirror → Intermediate image → Objective lens → Eyepiece lens → Human eye
3. Light source → Specimen → Intermediate image → Objective lens → Eyepiece lens → Human eye → Condenser and Mirror
4. Human eye → Specimen → Condenser and Mirror → intermediate Image → Objective lens → Eyepiece lens → Light source

Q. The free living cells in pond water is discovered by_________.

1. Leeuwenhoek
2. Robert Hooke
3. Purkinje
4. Robert Brown

Q.

What happens when methylene blue stain is added to cheek cell?