USAT-M MCQs

Smooth ER lacks ribosomes.
It synthesizes lipids and helps detoxify chemicals.

The Golgi receives materials from the ER.
It modifies and directs them to their destinations.

Lysosomes break down macromolecules and damaged cell parts.
Their enzymes work best in an acidic environment.

Mitochondria convert energy from nutrients into ATP.
They contain their own DNA and ribosomes.

Chloroplasts contain chlorophyll and photosynthetic membranes.
They convert light energy into chemical energy.

The nucleolus is a dense region inside the nucleus.
It produces rRNA and assembles ribosomal subunits.

Ribosomes translate mRNA into polypeptide chains.
They occur freely in cytoplasm or attached to rough ER.

Rough ER has ribosomes attached to its surface.
It folds and modifies proteins entering the endomembrane system.

Both sides of a valid physical equation must have the same dimensions.
Dimensional analysis can reveal inconsistent formulas.

The newton is derived from base units as kg·m/s².
Metre, kilogram, and second are base units.

Chemistry examines what matter is made of and how it behaves.
It also studies energy changes accompanying chemical processes.

Matter includes solids, liquids, gases, and plasma.
It is composed of atoms, molecules, or ions.