NET Biology MCQs

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.

Different genes are expressed in different cell types.
This creates specialized structures and functions.

As a cell grows, volume increases faster than surface area.
Small size improves transport of nutrients, gases, and wastes.

The four major macromolecule groups perform structural, energetic, catalytic, and informational roles.
They are built mainly from carbon-containing compounds.

Monomers link through covalent bonds.
Examples include amino acids, nucleotides, and monosaccharides.