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A “biological annihilation” of wildlife in recent decades means a sixth mass extinction in Earth’s history is under way and is more severe than previously feared, according to research. Scientists analysed both common and rare species and found billions of regional or local populations have been lost. They blame human overpopulation and over consumption for the crisis and warn that it threatens the survival of human civilization, with just a short window of time in which to act.
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Heat energy was retained and water vapor condensed
I took the test and that is the correct answer
Answer: b
Explanation:
(B) they are proteins
(C) they denature at high temperatures
(D) they are assisted by vitamins and minerals
(E) enzymes are not normally degraded during a reaction
48 SAT BIOLOGY
Answer:
The statement D 'they are assisted by vitamins and minerals' is incorrect.
Explanation:
Enzymes are biological catalysts which speed up a reaction. Their working mechanism is usually referred to as lock and key mechanisms as they make a lock and key type model while functioning. Each enzyme is specific for a specific kind of substrate. All enzymes are proteins. Enzymes itself are not degraded or get used up in a reaction. They might change from one form to another. But they are not assisted by vitamins or minerals, hence that statement is incorrect.