When DNA fragments are separated by electrophoresis, ________
a. the largest fragments move the fastest
b. neutrally charged fragments move the fastest
c. the smallest fragments move the fastest
d. all the fragments move at the same rate
c
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A cohort is a group of individuals of the same sex
Indicate whether the statement is true or false.
After eleven years, the descendants of transferred guppies in Venezuela and Trinidad were
significantly larger than their ancestors, indicating that the larger size of guppies was an adaptation to the new environment. __________________ Indicate whether the statement is true or false.
Why are viruses called obligate intracellular parasites?
a) They must use a host cell's amino acids to synthesize proteins. b) They must use a host cell's nucleotides for transcription and replication. c) They must use a host cell's metabolic enzymes and pathways to obtain energy. d) They must use a host cell's ribosomes to synthesize proteins. e) All of the above.
The time required for a 10-fold reduction in the viability of a microbial population using a particular heating method is called the
a. decimal reduction time. b. thermal death time. c. disinfection time. d. sterilization time.