ECAT MCQs

Condensation polymerization joins bifunctional monomers.
Water or another small molecule is often released.

Protein sequence determines folding and function.
Proteins act as enzymes, structures, receptors, and transporters.

The molecule has two carbons and an alcohol group.
The correct name is ethanol.

Enzymes lower activation energy and increase reaction rate.
They are selective for particular substrates and conditions.

The molecule has a two-carbon carboxylic acid chain.
Its IUPAC name is ethanoic acid.

The word 'happily' describes how the children played.
A word that modifies a verb in this way functions as an adverb.

Qualitative analysis determines what is present.
It may use color changes, precipitates, spectra, or instrumental signals.

In this sentence, 'light' names a thing that can be turned off.
Therefore, it functions as a noun rather than a verb or adjective.

Quantitative methods produce numerical concentration or mass results.
Accuracy, precision, and calibration are essential.

'Under' shows the spatial relationship between the keys and the cushion.
Words that express such relationships are prepositions.

Components travel at different rates through the system.
Chromatography can separate, identify, and quantify substances.

'But' joins two independent clauses of equal grammatical importance.
It is one of the standard coordinating conjunctions.