brodidit for students
خامرے
نویں جماعت · حیاتیات · 9 سوالات
نام: ____________________ تاریخ: ____________
Enzymes are made of:
- A Proteins
- B Carbohydrates
- C Lipids
- D Nucleic acids only
The substance on which an enzyme acts is called the:
- A Substrate
- B Inhibitor
- C Product
- D Coenzyme
Most human enzymes work best at about:
- A 37 degrees C
- B 0 degrees C
- C 100 degrees C
- D 70 degrees C
At a very high temperature, an enzyme:
- A Turns into a carbohydrate
- B Works faster forever
- C Is denatured and stops working
- D Becomes a substrate
The lock and key model explains:
- A How cells divide
- B How plants make food
- C How enzymes fit their specific substrates
- D How blood circulates
An enzyme is not used up in the reaction because it is a:
- A Product
- B Substrate
- C Catalyst
- D Reactant
Enzyme names usually end in:
- A -ine
- B -ase
- C -ide
- D -ose
Amylase digests:
- A Fat
- B Protein
- C Starch
- D Cellulose only
Very low temperature makes an enzyme:
- A Larger
- B Denatured permanently
- C Inactive
- D Faster
جوابی کلید
1. A, 2. A, 3. A, 4. C, 5. C, 6. C, 7. B, 8. C, 9. C
Enzymes are protein molecules that act as biological catalysts.
The enzyme binds to its substrate and converts it into products.
Human body temperature is about 37 degrees C, which suits most human enzymes.
High heat changes the enzyme's shape so it can no longer fit its substrate.
The active site of an enzyme fits its own substrate like a key in a lock.
A catalyst is not consumed.
For example amylase and lipase.
Amylase breaks starch into sugars.
Cold slows the enzyme down but does not destroy it.