In the preceding experiment, bacteria that form blue colonies on X-gal/IPTG LB agar containing antibiotic also contain
a. a gene for antibiotic resistance.
b. an active lacZ gene.
c. an inactive lacZ gene.
d. both a and b.
d
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After three replications of a single DNA molecule,
what percent of the resulting molecules contain one strand of the “original” DNA? a. 0 percent b. 25 percent c. 50 percent d. 75 percent e. 100 percent
Biological hazardous waste bags should be what color?
a. Green or Blue b. Red or Red-Orange c. Clear or Black
A protein is 300 amino acids long. Which of the following could be the number of total nucleotides in the section of DNA that codes for this protein? (Remember: DNA is double-stranded.)
A) 300 B) 1800 C) 100 D) 3 E) 900
Reproductive isolation is ________ by natural selection to lead to speciation.
Fill in the blank(s) with the appropriate word(s).