Cells

Q.

What are the main postulates of the cell theory?

Q.

Describe the structure of a cell.

Q.

Why lysosomes are known as suicidal bags?

Q.

What is the organization of the human body from smallest to largest?

Q.

Differentiate between unicellular and multicellular organisms

Q.

What function do nerve cells perform?

Q.

Cells arise from the pre-existing cells was stated by :

1. Hooke

2. Schleiden

3. Corti

4. Virchow

Q.

Which of the following are bound by a single membrane?

1. Mitochondria

2. Vacuole

3. Lysosome

4. Plastid

Q.

The longest cell in the human body is

1. Liver cell

2. Nerve cell

3. Muscle cell

4. None of these

Q.

Can humans create life?

Q. Which is the largest cell in the world ?

1. ostrich egg
2. elephant cell
3. snake egg
4. none of these

Q.

Who is considered to be the father of cytology?

Q.

What is a cell in biology ?

Q.

Multicellular organisms develop from a single cell

1. False
2. True

Q. Question 2
Make a sketch of the human nerve cell. What function do nerve cells perform?

Q.

What is the difference between a lysosome and a peroxisome?

Q.

How does a living cell perform these basic functions?

Q.

Which of the following cell does not have a nucleus?

1. White blood cell

2. Red blood cell

3. Nerve cell

4. Muscle cell

Q.

Why is the microscope important to the study of biology?

Q. Name the smallest unit of life.

Q.

What is the central vacuole and what is its function?

Q.

What is a cell body?

Q.

Read the statements given below and choose the correct option-

Assertion: Rudolf Virchow modified the hypothesis of cell theory given by Schleiden and Schwann.

Reason: Cell theory says that all cells arise from pre-existing cells.

1. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

2. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

3. Both Assertion and Reason are incorrect.

4. Assertion is correct but Reason is incorrect.

Q. Question 8
'Cells are the basic structural units of living organisms'. Explain.

Q.

The structural and functional unit of life called cell was discovered by :

1. Robert Boyle

2. Robert Hooke

3. Charles Darwin

4. Robert Koch

Q.

Why is osmosis important in red blood cells?

Q.

What do you mean by cell?

Q.

We do not sense any pain when we clip our nails or cut our hair.

Q.

What are the 3 main types of work performed by a cell?

Q. A group of similar cells that are specialised to perform a specific function is called ____.

1. an organ
2. a tissue
3. an organism
4. an organ system