Question

Which statements are correct for all enzymes?
1
They are proteins.
2
They are secreted into the alimentary canal
3
They speed up biochemical reactions.
4
None of them work at low pH.

answers

a.1 and 3
b.1 and 4
c. 2.3
d.2.4
​

Answer 1

Answer:

a.1 and 3

b.1 and 4

c. 2.3

d.2.

Answer 2

Answer:B

Explanation: