Question

reviewing the concepts: enzymes
part i. vocabulary practice: use the word bank below to fill in the blanks. all words will be used.
active site catalyst induced fit substrate denature
lock and key activation enzymes coenzymes cofactors

1. a ___ is any substance which speeds up the rate of a chemical reaction.
2. all ___ are considered both proteins and organic catalysts.
3. to do its job, an enzyme binds to a molecule called a ___.
4. the energy required for a chemical reaction to occur is called the ___ energy.
5. _ (vitamins) and _ (metal ions) bind to a substrate and help an enzyme fit better with its substrate.
6. an enzyme binds to a substrate at the ___.
7. the ___ model of enzyme action states that enzymes are specific to one substrate.
8. the ___ model of enzyme action states that enzymes change shape slightly when they bind to their substrate.
9. when factors such as temperature or ph get too high, an enzyme will ___ and change shape.

Explanation:

1. A catalyst speeds up chemical reactions.
2. Enzymes are proteins and organic catalysts.
3. An enzyme binds to a substrate and reduces activation energy.
4. Co - enzymes (vitamins) and co - factors (metal ions) help enzymes.
5. Induced fit allows enzymes to fit better with substrates.
6. An enzyme binds to a substrate at the active site.
7. The lock and key model says enzymes are specific to one substrate.
8. The induced fit model says enzymes change shape when binding.
9. High temperature or pH can denature enzymes.

Answer:

1. Catalyst
2. Enzymes
3. Substrate; Activation
4. Co - enzymes; Co - factors
5. Induced Fit
6. Active Site
7. Lock and Key
8. Induced Fit
9. Denature