11
MCQ (Single Correct Answer)
Which of the following statement is not true for plasma membrane?
A
It is present in both plant and animal cell
B
Lipid is present as a bilayer in it
C
Proteins are present integrated as well as loosely associated with the lipid bilayer
D
Carbohydrate is never found in it
12
MCQ (Single Correct Answer)
Plastid differs from mitochondria on the basis of one of the following features. Mark the right answer.
A
Presence of two layers of membrane
B
Presence of ribosome
C
Presence of thylakoids
D
Presence of DNA
13
MCQ (Single Correct Answer)
Which of the following is not a function of cytoskeleton in a cell?
A
Intracellular transport
B
Maintenance of cell shape and structure
C
Support of the organelle
D
Cell motility
14
MCQ (Single Correct Answer)
The stain used to visualise mitochondria is
A
fast green
B
safranin
C
acetocarmine
D
janus green
15
What is the significance of vacuole in a plant cell?
Explanation
The vacuole is a membrane bound space found in the cytoplasm. It contain water, sap, excretory product and other materials that are not seful for the cell. In plants osmosis vacuoles occupy $90 \%$ of the volume of the cell. They help in maintaining cell fluid balance, and shape of the cell by maintaining turger pressure against the cell well.