Chapter 2: Enzymes and Hypothesis Testing

First step of the scientific method?

Observation/question

What is a hypothesis?

Testable statement

is a hypothesis an “educated guess”?

No

Does a hypothesis have to be an if/then statement?

No

Results tell you___ happened

what

a conclusion simply repeat your results?

no

after recording results, what happens to the hypothesis?

support/reject

what type of molecule are enzymes?

proteins

enzymes are biological

catalysts

what do enzymes do to chemical reactions?

speed them up

enzyme ___ determines its function?

structure/shape

energy required for a chemical reaction to occur?

activation energy

enzymes __ activation energy

lower

do enzymes raise or lower activation energy?

lower

Substance changed/broken down by an enzyme?

substrate

end result of a chemical reaction?

product

where does the substrate bind on an enzyme?

active site

theory describing the specific fit between enzyme and substrate?

Lock and Key

does the enzyme come out of the reaction changed or unchanged?

Unchanged

Modification of an enzyme’s shape?

Denaturation

extreme changes in what two environmental conditions can affect enzyme activity?

Temperature +PH

why can extreme PH effect on enzyme?

change its shape

why can extreme temperature affect an enzyme?

change its shape

why does changing an enzyme’s shape affect its function?

substrate wont fit

ph 1 is extremely?

Acidic

Neutral PH

7

ph 14 is extremely?

Alkaline

do all enzymes have the same ideal conditions?

No