Matching. Write the letter that corresponds to the best answer. ____ ...

8. In the following reaction, lactose is a(n):
Lactose ---lactase- galactose + glucose
A. Substrate
B. Product
C. Enzyme
D. Active site
9. In the above reaction, lactase:
A. is consumed in the reaction.
B. makes the reaction occur more slowly.
C. catalyzes the reaction.
D. is a product of the reaction
10. Penicillin is a more effective antibiotic for medical use than gramicidin primarily because:
A. Bacteria are less likely to develop resistance to penicillin.
B. Gramicidin is harder to mass produce than penicillin.
C. Gramicidin does not kill bacteria effectively.
D. Gramicidin is toxic when taken internally.
11. Attenuated vaccines contain:
A. live but weakened viruses
B. only DNA
C. only antigens
D. only antibodies
12. Which of the following enzymes is used to curdle milk?
A. rennin
B. insulin
C. lactase
D. galactosidase
13. Microorganisms added to dairy products to begin the fermentation process are referred to as
the:
A. substrate
B. product
C. starter culture
D. enzyme inhibitor
14. A suppressive soil is one with:
A. a healthy population of microbes that are beneficial to plants.
B. few or no antibiotic-producing microorganisms.
C. frequent outbreaks of plant disease.
D. no pathogens.