Question

rationalize all choices why is it wrong or correct at least 1 to 2 sentences each.

(1) An apoenzyme, by itself, has no biochemical activity.
(2) Urease is an example of an enzyme with absolute specificity.
(3) All enzymes have names that end in -ase.
A. All three statements are true.              B. Two of three statements are true.                            C. One of three statements are true.                                D. None of these are true

Answer 1

Ans: B.

An apoenzyme is an inactive enzyme, activation of the enzyme occurs upon binding of an organic or inorganic cofactor.

Absolute specificity can be thought of as being exclusive, in which an enzyme acts upon one specific substrate. Absolute specific enzymes will only catalyze one reaction with its specific substrate. The enzyme urease catalyzes the hydrolysis of a single amide, urea.

Not all enzymes name end with "ase". Exception, some of the originally studied enzymes don't have suffix such as pepsin, rennin, and trypsin.