Enzymes Quiz

Question 1

Endergonic Reactions

Answer 1

Input energy. Products of an endergonic reaction store energy (absorb) in covalent bonds. More energy in products than reactants.

Question 2

Exergonic Reactions.

Answer 2

Release energy. Energy stored in covalent bonds are broken to release energy. Less energy in products than reactants.

Question 3

Activation Energy

Answer 3

The amount of energy needed to make a chemical reaction start

Question 4

Competitive Inhibitor

Answer 4

Inhibitors are chemical interference with an enzyme reaction. Resembles substrate and competes for active sites of an enzyme (blocks them). Interferes with active site of enzyme so the substrate can’t bind.

Question 5

What are enzymes?

Answer 5

Enzymes are a type of protein that speed up biochemical reactions by lowering the activation energy. For this reason, and the fact that can be used over and over again, they are called catalysts,

Question 6

How does enzyme binding work?

Answer 6

Enzymes are specialized molecules that bind to reactants (aka substrates) and help to break or form bonds. They then release a newly created products.

Question 7

Activation Site

Answer 7

The place where the specific substrate bonds to the enzyme.

Question 8

What is denaturation? What is it caused by?

Answer 8

Denaturation is when the enzyme’s active site gets deformed and loses its specific shape, causing a loss of biological activity. It’s caused by extreme changed in pH, temperature, and solubility.

Question 9

Substrate

Answer 9

Substances that are changed during a reaction (reactants).

Question 10

Products

Answer 10

Substances that are made by a chemical reaction

Question 11

What type of reaction is photosynthesis?

Answer 11

Energy is stored in the bonds of glucose, therefore it’s an endergonic reaction.

Question 12

What type of reaction is cellular respiration?

Answer 12

Energy is released as ATP when glucose is broken down, therefore it’s an exergonic reaction.

Question 13

Luciferin and Luciferase. What are they? What’s their importance?

Answer 13

Luciferin is the substrate and luciferase is the enzyme. Luciferin is modified (change in wavelength) to make new bioluminescent molecules that’s light won’t be absorbed by surrounding cells. This allows cancer cells to be illuminated and easily visible under a microscope.