Most Important & Most Repeated MCQs

Centromere means the middle pin of chromosome.
The shape of chromosome depends on the position of this pin.
If it is in the middle then chromosome looks like X-Shape and if it is near the end then chromosome looks like V or L shape.

Male Gametangium produces male sex cells.
Female Gametangium produces female sex cells.
Ovum is a female sex cell.

Pili are tiny hair-like parts on bacteria. They help one bacterium connect with another to pass genetic material during conjugation.

White Blood Cells protect our body.
Osmosis is movement of water only.
Exocytose throw things out of the cells.
Hydrolysis means breaking of something by using water.

Hemoglobin has four protein parts, each part can hold oxygen and together they carry oxygen in blood.
Disulphide, Amino Acid and Peptical Bond are parts of proteins, not whole proteins.

Starch is the main reserve (stored) food of higher plants.
Was is a protective substance.
Lipids are fats that cant reserve food.
Cellulose is a structural material of plant cell wall.

Antibiotics are substances that stop the growth of microorganisms or kill them, even when present in very small (low) amounts.
Lipids are fats and not used to control microbes.
Carbohydrates provides energy and helps in growth.
Antibodies are produced by the body and provide low concentration to inhibit growth.

Endoplasmic Reticulum has membrane.
Mitochondria has two membranes.
Golgi apparatus surrounded by membrane.

Amphoteric means a substance that can act both as an acid and as a base.