Where are extrinsic proteins found in the cell membrane?

1

(a)

On the outer and inner surface of phospholipid matrix.

What is the shape of WBCs and tracheid?

1

(a)

WBCs ae amoeboid and tracheids are elongated in shape.

Where is glycocalyx been found?

1

(a)

Glycocalyx is found as a thick outermost covering of cell either as a capsule or a slime layer.

What is the name given to the infoldings of plasmalemma in prokaryotic cell below the wall?

1

(a)

Mesosomes.

What is referred to as satellite chromosome?

1

(a)

Those chromosomes which have a secondary constriction, are called sat chromosomes.

In which organelle the proteins required for functioning of the nucleus are formed.

1

(a)

Proteins required are formed in the cytoplasm.

Why are gas vacuoles named so?

1

(a)

Gas vacuoles are name so, because these are permeable to atmospheric gases and not to water

What is the term given to the 70S ribosomes found in the matrix of chloroplast?

1

(a)

The term given is plastido  ribosomes.

Which cells have well developed SER and which cell contain abundant RER?

1

(a)

Muscle cells have a well developed SER and cells which synthesise proteins.

Give the term used for the stacks of thylakoids

1

(a)

Grana or intergrana thylakoides.

What is the difference between cell walls of Gram positive and Gram negative bacteria?

2

(a)

How do the ribosomes of prokaryotic cells differ from the ribosomes of eukaryotic cells? Also, tell what is similar about them?

2

(a)

Which cell organelles are referred to as suicide bags?Why are they given this name?

2

(a)

Multicellular organisms have division of labour. Explain.

2

(a)

Justify the statement, 'Mitochondria is the powerhouse of the cell'

2

(a)

What is the advantages of phospholipid bilayers fluidity?

2

(a)

What are plasmids? Describe their role in bacteria.

3

(a)

The lysosomal enzyme does not destroy the cell's own cytoplasm.why?

3

(a)

State the chief functions of mitochondria.

3

(a)

Distinguish between chloroplast and chromoplast.

3

(a)

The diagram shows a section of cell membrane.Identify the components labelled A-F.

3

(a)

Fill in the blanks at A, B, and C as shown in diagram

3

(a)

The diagram shows some of the structures present in an animal cell.

Which of these structures is responsible for
(i) Manufacture of lipids and steroids 
(ii) Release of energy
(iii) Manufacture of hormones and digestive enzymes
(iv) Production of spindle fibres in cell division 
(v) Endo and exocytosis?

5

(a)

Describe the structure of the following with the help of labelled diagrams.
(i) Nucleus
(ii) Centrosome

5

(a)