Cultures of genetically identical cells are called ____
a. bacteriophages
b. clones
c. prophages
d. prions
e. auxotrophs
ANSWER: b
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Humans are unable to get metabolic energy from cellulose because:
A. cellulose contains very little chemical energy. B. cellulose is not part of a normal diet. C. cellulose digesting enzymes are absent from the human gut. D. cellulose does not taste good. E. cellulose is present in large quantities in the gut.
The enzyme responsible for joining Okazaki fragments together during DNA replication is
A. DNA polymerase. B. helicase. C. topoisomerase II. D. DNA ligase. E. DNA replicase.
Which taxa contain the largest number of known species?
A) coleoptera B) plants (embryophytes) C) fungi D) crustaceans
Mycoplasmas are classified with the gram positive firmicutes, even thought they lack a cell wall.
a. true b. false