AKU MBBS MCQs

Avogadro's constant gives the number of entities in one mole.
The entities may be atoms, molecules, ions, or formula units.

Molar mass is numerically related to relative atomic or molecular mass.
Its common unit is g/mol.

The metre is the SI base unit of length.
Other metric length units are derived from it using prefixes.

The kilogram is the SI base unit of mass.
The gram is one-thousandth of a kilogram.

The second is the SI base unit of time.
Minutes and hours are accepted non-SI units derived from it.

A scalar has magnitude only.
Speed has no associated direction.

All organisms are made of one or more cells.
Cells perform the fundamental processes required for life.

Modern cell theory states that cells come from existing cells.
Cell division provides continuity of life.

The plasma membrane is selectively permeable.
It regulates exchange between the cell and its environment.

Phospholipids form a bilayer with hydrophilic heads and hydrophobic tails.
Proteins and other molecules are embedded within it.

Membrane components can move laterally within the bilayer.
The membrane is flexible rather than rigid.

The nucleus stores chromosomes in eukaryotic cells.
It also regulates gene expression and cell activities.