Which statement describes enzymes?
A) Enzymes are not very specific.
B) Enzymes are not affected by high heat, as proteins are.
C) Enzymes can be recycled and used over and over again.
D) Enzymes are "used up" during chemical reactions.
C
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What is the role of light in photosynthesis?
A. It excites electrons. B. It splits ATP molecules. C. It is the source of electrons. D. It fixes carbon into sugars.
What do sponges and cnidarians have in common?
A. Organization of cells into tissues B. Symmetry C. Mobility D. None of the above are characteristics that sponges and cnidarians share
How many embryos did Nadya Suleman’s
doctor put into her uterus?
a. 8 b. 9 c. 10 d. 11 e. 12
An epigenetic change is one that occurs when a microbial cell produces a toxin or an exoenzyme that directly damages host cells.
Answer the following statement true (T) or false (F)