SG 2.4
ANSWERS IN ORDER
(Note: These answers were taken from a teacher key, which cannot be found online)
1. (Chemical Reactions): A process that changes one set of chemicals into another set of
chemicals
2. Reactants definition: Elements or compounds that enter into the reaction
Products definition: Compounds or elements produced by the reaction
3. Type 1: Exothermic
Type 2: Endothermic
4. Energy
5. The energy required before a process (Activation energy)
6. Endothermic reactions, because they require less activation energy
7. It reduces the necessary amount of energy
8. Enzymes
9. Proteins can form many different shapes
Enzyme
Products
ActiveSite
10.
11. 1) Reactants (substrates) enter the enzyme
2) The reaction occurs
3) Products and energy are released
12. The substrate is the “key” to the enzyme, or “lock”, because a reaction can only occur
within the enzyme when when the substrates for said reaction enter it.
13. Energy is being “unlocked” because after the substrate, or “key”, enters the enzyme, or
“lock”, it produces energy.
14. Answers may vary: Sample Answer: Control of chemical reactions allows control over
energy use and release, and can allow animals to adapt to their climate or environment
through the proper creation and use of energy, and heat.