Chapter 1 Cell: The Unit Of Life

Question 1

Flow chart of bacterial cell (prokaryotic cell)

Answer 1

1)Glycocalyx
2)Cell wall
3)Protoplast - a) cell membrane
|
Mesosome
b) protoplasm
|
1)cytosol 2)nucloid
|
70s ribosomes
Polysome/ergosome
Chromatophores
Gas vacoule
Plasmids
Cell inclusion/deutoplasm
4)surface appendages
Pilli\fimbrae
Flagella

Question 2

Outer membrane in gram negative bacteria is made up of?

Answer 2

It is made up of
Lipopolyssacharides
Proteins
Phospholipids

Question 3

Techoic acid

Answer 3

It is made up of glucose,phosphates and alcohol.

It is acidic polymer of sugar.

Question 4

Cell membrane

Answer 4

It os made up of phospholipid bilayer and protein collectively called as lipoproteins.

Question 5

Cytosol (cytoplasm)

Answer 5

It is made up of water,minerals,enzymes and other substances.

Question 6

Mesosome

Answer 6

Gram positive bacteria mein hi hota hai. Gram negative mein v ho skta hai …but bahut kam.
2 types
Central/septum mesosome
Lateral mesosome also called as chondroid.

Question 7

Chromatophores

Answer 7

Also called as vasicular thylakoids or lamallae.

Question 8

Nucloid

Answer 8

Contains polyamins instead of basic histone proteins which provides basicity and stability to DNA.
Naked ds circular dna .
Folded withthe help oglf polyamines and rna.

Question 9

L lysine

Answer 9

It is present in gram positive bacteria.

In gram negative bacteria it is replaceable by diaminopimelic acid (DAPA).

Question 10

Cell inclusions

Answer 10

It is also called as egastic substances or deutoplasm.
It contains all non living components of cell.
Eg - volutin granules (polymetaphosphate granules) (which is a energy source),polybita hydroxy butylate.