Fluid mosaic model exhibits amphipathy because of

• glycoproteins

• phospholipids

• lipids

• glycolipids

The controlling centre of cell is

• nucleus

• nucleolus

• mitochondria

• ribosome

Chromosomes in a bacterial cell can be 1 to 3 in number and

• are not circular or linear

• can be circular as well as linear within the same cell

• are always circular

• are always linear

Which of the following is a single membranous structure?

• Lysosome

• Nucleus

• Mitochondria

• Chloroplast

195.

A prokaryotic cell lacks

• true nucleus

• nuclear membrane

• membrane bound organelles

• All of the above

Passive food ingestion in Amoeba is known as :

• import

• invagination

• circumfluence

• circumvallation

Principle protein of cillia and flagella is :

• globulin

• fibrin

• flagellin

• tubulin

Active transport occurs :

• against concentration gradient and requires ATP

• against concentration gradient and does not require ATP

• along concentration gradient but require ATP

• along concentration gradient but does not require ATP

Energy currency (reservoir) of the cells is:

• AMP

• ATP

• RNA

• DNA

Which cell organelle is covered by only one unit membrane ?

• Nucleus

• Plastids

• Mitochondria

• Lysosome