Which of the following scientists coined the term 'cell'?

1

(a)

Leeuwenhock

(b)

J.E Purkinje

(c)

Robert Hooke

(d)

Robert Brown

The largest cell in human body is

1

(a)

muscle cell

(b)

nerve cell

(c)

Kidney cell

(d)

liver cell

Iodine solution is used to

1

(a)

stain onion peel cells

(b)

stain human cheek cells

(c)

mount onion peel cells

(d)

mount human cheek cells

The barrier between the  cytoplasm and the outer environment in an animal cell is

1

(a)

tonoplast

(b)

nuclear membrane

(c)

cell wall

(d)

plasma membrane

Mitochondria and plastids are able to synthesise some of their own proteins because they have

1

(a)

DNA and nucleolus

(b)

RNA and lysosomes

(c)

DNA and ribosomes

(d)

RNA and ribosomes

Stroma is present in

1

(a)

mitochondria

(b)

leucoplast

(c)

endoplasmic reticulum

(d)

lysosomes

Which organelles, like mitochondria, have their own DNA and ribosomes?

1

(a)

Golgi apparatus

(b)

Vacuoles

(c)

Endoplasmic reticulum

(d)

Plastids

The cell wall is found in the cells of plants, fungi and ..............................

1

(a)

bacteria

The nucleus in eukaryotes is separated from the cytoplasm by .........................  membrane.

1

(a)

double-layered

The cells which do not have membrane-bound organelle are called ...........................cells.

1

(a)

prokaryotic

The term 'protoplasm' for the fluid substance of the cell was coined by ............................

1

(a)

Purkinje

CO₂ moves out of the cell, from a region of high concentration to a region of low concentration outside the cell by the process of .............................

1

(a)

diffusion

Due to loss of water through osmosis, there is shrinkage of contents of a living plant cell. This phenomenon is known as .........................

1

(a)

plasmolysis

Name two single-celled animals.

1

(a)

Name the smallest cell.

1

(a)

Name the largest plant cell.

1

(a)

What is the function of cell wall and plasma membrane?

1

(a)

What are cell organelles?

1

(a)

What is the function of ribosomes?

1

(a)

Name the site of photosynthesis.

1

(a)

How do substances like CO₂ and water move in and out of the cell? Discuss.

2

(a)

What is the significance of cell wall in plant cell?

2

(a)

Distinguish between plasma membrane and cell wall.

2

(a)

Differentiate between prokaryotic cell and eukaryotic cell.

2

(a)

Write three main points of cell theory as expressed by Schleiden, Schwann and Virchow.

2

(a)

What is the function of an endoplasmic reticulum?

2

(a)

What type of enzymes are present in the lysosomes? What is their function? Which organelles membrane manufacture these enzymes?

2

(a)

What are Plastids?

2

(a)

(a) Name the organelle which provides turgidity and rigidity to the plant cell. Name any two substances which are present in it.

(b) How are they useful in unicellular organisms?

2

(a)

Describe the role played by the Lysosomes. Why are these termed as suicidal bags? How do they perform their function?

3

(a)

Water forms two-thirds of the weight of the body. Body cells contain about 60% to 70% of water.All life processes carried out in a cell require water medium.It is essential to well being, deprivation or loss of water, as in case of diaohrrea, dysentry, vomiting etc. is more immediately serious than of any other article in diet.On the basis of above information answer the following questions:
(i) What first aid you will provide to a patient who has lost sufficient water from the body cells due to loose motions?
(ii) How would you prepare the solution to hydrate the body cells of the patient?
(iii) What would you do for the community with this information?

4

(a)

Describe the role played by the lysosomes in the cell. Why are these termed as suicidal bags? How do they perform their function?

5

(a)