Cells

Q.

What is cell theory? Who formulated it? In short

Q.

What is the function of proteins in the cell membrane?

Q. Why are cells the fundamental units of life and why are they important?

Q.

Why cell is called structural and functional unit of life? Explain in details.

Q. Which of the following statements is not a part of the cell theory?

1. Cells are the basic structural and functional units of life.
2. All cells arise by division of pre-existing cells.
3. All cells are surrounded by cell wall.
4. All living beings are made up of one or more cells.

Q. A small cell size presents a larger surface area to volume ratio. What is/are the benefits of the large surface area?

1. Quick exchange of respiratory gases
2. All of the above
3. Ease of repair of any damage to the cell
4. Efficient nutrient diffusion into the cell

Q.

All living cells are of the same shape and size. True or False?

1. False

2. True

Q.

The cell theory states that all living organisms are made up of cells.

Which of the following is a living organism not composed of cells?

1. Bacteria

2. Fungi

3. Viruses

4. Algae

Q.

Why are viruses exception to cell theory

Q.

How is energy stored in a cell?

Q.

Where are integral proteins present in the membrane?

Q. You put identical cells into three beakers X, Y, and Z. Beaker X contains distilled water, beaker Y contains a normal saline solution, and beaker Z contains saturated salt solution. All beakers contain the same amount of solution. Identify the correct observation from the following:

1. Cells in beaker Z will be more swollen than those in X and Y.
2. Cells in beaker X and Z are similar in shape and size.
3. Cells in beaker X did not swell up at all.
4. Cells in Y and Z are smaller in size than those in X.

Q.

All of the following statements are true regarding the "cell theory" except

1. All living things are made up of cells

2. Cells are the smallest structural and functional unit of life

3. Cell comes only from pre-existing cells

4. All cells arise spontaneously

Q. First living cells were discovered by:

(a) Robert Hooke
(b) Purkinje
(c) Leeuwenhoek
(d) Robert Brown

Q. What is nervous tissues? Explain with a diagram.

Q.

Match the following scientists with their works, in the discovery of cells.

Column I Column II

i). Robert Hooke a. Constructed first microscope (1632 - 1723)

ii). Schleiden b. Animal cell (1839)

iii). Schwann c. Plant cell (1838)

iv). Leeuwenhoek d. Cell (1665)

1. i).➡ a., ii).➡ b., iii).➡ c., iv). ➡ d.

2. i).➡ d., ii).➡ c., iii).➡ b., iv). ➡ a.

3. i).➡ c., ii).➡ d., iii).➡ a., iv). ➡ b.

4. i).➡ b., ii).➡ a., iii).➡ d., iv). ➡ a.

Q.

The size of a cell is measured in

1. mm

2. cm

3. µ

4. None of these

Q.

Robert Hooke discovered the _________ in a cell.

1. Nucleus

2. Cell wall

3. Cytoplasm

4. Cell membrane

Q. A man accidentally touches a hot iron and withdraws his hand immediately. Identify the tissues that come into play during this action in the correct order.

1. Nervous → Epithelial → Muscular
2. Epithelial → Muscular
3. Epithelial → Nervous → Muscular
4. Muscular → Nervous

Q.

Name the scientists who proposed cell theory.

Q. Human cheek cells are commonly stained with:

1. Eosine
2. Methylene blue
3. Safranin
4. Acetocarmine

Q.

Why is a cell called the basic structural and functional unit of a living organism?

Q. There are three beakers A, B and C containing hypertonic, isotonic and hypotonic solutions respectively. A raisin is put in each of these beakers. In which of these beakers, size of raisin would be maximum?

1. Beaker A
2. Beaker B
3. Beaker C
4. Can't say

Q. ___ is the structural and functional unit of life.

Q.

The smallest living cells

1. lack a cell wall

2. are anaerobic

3. are not pathogenic to humans

4. all of the above

Q.

Question 2
If the organisation of a cell is destroyed due to some physical or chemical influence, what will be its outcome?

Q. Which of the following cells are smallest in size?

1. Bacterial cells
2. Nerve cells
3. Muscle cells
4. Red blood cells

Q.

Who invented the cell?

Q.

Question 53
Draw a plant cell and label the parts which

(a)Determines the function and development of the cell

(b)Packages materials coming from the endoplasmic reticulum

(c)Provides resistance to microbes to withstand hypotonic external media without bursting

(d) Is the site for many biochemical reactions necessary to sustain life.

(e) Is a fluid contained inside the nucleus

Q.

Why viruses are exceptions of cell theory