Enzyme Functions (#11)

What is the function of an enzyme?

• to speed up chemical reactions in a cell

• to receive messages

• to carry molecules across membranes

• to turn on or turn off genes

a "catalyzed" reaction means

• an enzyme speeds up how fast it takes place

• an enzyme is required for the reaction to take place at all

• cows are involved

• an enzyme slows down the reaction

The substrate is

• another word for enzyme

• the chemical(s) that are reactants in a catalyzed reaction

• amino acids

• water

What is an alternative way to speed up a reaction?

• heat up the reactants (or substrates)

• cool down the reactants (or substrates)

Tags

NGSS.HS-PS1-5

Where is the substrate held to stabilize it and lower the energy of the reaction?

How did amino acids hold the substrate in the active site? (in the example shown in the video)

• hydrogen bonds

• london dispersion forces

• covalent bonds

• ionic attractions

Histidine (an amino acid) donates a proton, acting as an...

• acid

• base

• indicator

• conjugate base

Dehydration means

• water is a product of the reaction

• water is pulled out of the enzyme

• the enzyme's active site is hydrophobic

Serine acts as a base when it...

• accepts a hydrogen ion

• donates a hydrogen ion

Enzymes always return to their original state after a reaction.

• True

• False