The cell's metabolic reactions involve the participation of ________ that lower the activation energy needed for the initiation of a reaction.
A. vitamins
B. enzymes
C. cofactors
D. coenzymes
E. ATP
Answer: B
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Heavy metals may inactivate proteins by reacting with their sulfhydryl groups.
Answer the following statement true (T) or false (F)
The protozoan (Cyclospora/Cryptosporidium/Echinococcus) can occasionally be transmitted from person to person.
Fill in the blank(s) with the appropriate word(s).
The separation of nucleic acids in a DGGE gel is based on
a. GC content. b. melting profiles. c. taxonomic identity. d. all of the above.
What is the most likely explanation of why the overall mutation rates in bacteria and in humans are roughly similar?
(a) Cell division needs to be fast. (b) Most mutations are silent. (c) There is a narrow range of mutation rates that offers an optimal balance between keeping the genome stable and generating sufficient diversity in a population. (d) It benefits a multicellular organism to have some variability among its cells.