NET Applied Sciences MCQs

Proteins are polymers of amino acids linked by peptide bonds.
Their sequence determines folding and function.

Peptide bonds form through dehydration synthesis.
They link the carboxyl group of one amino acid to the amino group of another.

Heat, pH, or chemicals can disrupt protein folding.
The amino-acid sequence may remain intact.

Enzymes lower activation energy.
They speed reactions without being consumed overall.

The active site has a shape and chemistry suited to its substrate.
Binding promotes the transition state.

Substrates bind to active sites.
They are converted into products during the reaction.

Warming increases molecular collisions up to an optimum.
Excess heat disrupts enzyme structure.

PH alters ionization of amino-acid side chains.
Extreme pH can reduce activity or denature enzymes.

Glycogen is stored mainly in liver and muscle.
It can be broken down to release glucose.

Both cell types have DNA, ribosomes, and membranes.
Eukaryotes possess a nucleus and membrane-bound organelles.

The nucleoid is not enclosed by a nuclear membrane.
It contains the main bacterial chromosome.

Plasmids often carry accessory genes such as antibiotic resistance.
They can sometimes move between cells.