Bacteria transformed with plasmids are plated on growth medium containing ampicillin and X-gal. Blue colonies on
the plate contain bacteria with a ____ plasmid, meaning the lacZ+ gene is ____.
a. recombinant; deleted from the plasmid
b. nonrecombinant; intact
c. recombinant; intact
d. nonrecombinant; disrupted by the inserted DNA fragment
e. recombinant; disrupted by the inserted DNA fragment
ANSWER: b
You might also like to view...
The hormone that enhances fruit ripening is ____
Fill in the blank with the appropriate word.
Assume a neuron receives EPSPs and IPSPs from several adjacent neurons. How might that neuron's
threshold potential be reached, causing it to produce its own action potential?
a. if IPSPs outnumber EPSPs b. temporal summation c. spatial summation d. temporal and spatial summation e. if IPSPs equal EPSPs
Diploid (2n) means having
A. the somatic cells have all chromosomes except the sex chromosomes. B. a single set of chromosomes not having homologous pairs. C. both the allele and the autosome form of chromosomes. D. two complete sets of homologous chromosomes. E. one complete set of chromosomes in each gamete.
All of the following nucleotide bases are pyrimidines except
A. cytosine. B. cytosine and thymine. C. thymine. D. adenine. E. uracil.