CFUs (colony forming units) are the source for
A. biofilms.
B. mixed cultures.
C. pure cultures.
D. inoculums.
E. specimens.
Answer: C
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The Hardy-Weinberg relationship cannot be used to compute allele frequencies when one or more alleles are recessive
Indicate whether the statement is true or false
Why does DNA synthesis only proceed in the 5? to 3? direction?
a. Because DNA polymerases can only add nucleotides to the 3? end of a polynucleotide strand. b. Because the 3? end of the polynucleotide molecule is more electronegative than the 5? end. c. Because that is the direction in which the two strands of DNA unzip. d. Because that is the only direction that the polymerase can be oriented. e. Because the chromosomes are always aligned in the 5? to 3? direction in the nucleus.
Chemical signals released into the environment are called
A) telemones. B) pheromones. C) apomones. D) hormones. E) spermatophores.
How many turns of the Krebs cycle are needed to completely break down one molecule of glucose?
A) one B) two C) four D) three