A(n) ____ contains pluripotent stem cells
a. embryo before implantation in the uterus
b. embryo shortly after implantation in the uterus
c. placenta
d. umbilical cord
e. uterus
ANSWER: a
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The Southern blotting technique for transferring DNA from an agarose gel to a piece of nitrocellulose membrane is named for E. M. Southern, the person who developed the procedure.
Answer the following statement true (T) or false (F)
Which of the following statements is true?
a. Enzymes bond to macromolecules during condensation and detach during hydrolysis. b. Enzymes may act on any macromolecule within the same class as its primary reactant. c. Each type of enzyme serves as a catalyst for only one specific macromolecule. d. Enzymes only act during dehydration synthesis, never during hydrolysis.
The buildup of a toxin in an organism’s body is called biological magnification
____________________ Indicate whether the statement is true or false.
A chemical compound, regardless of its source (either natural or synthetic), that is capable of killing or inhibiting microorganisms is referred to as:
an antimicrobial an antibiotic a chemosynthetic agent semisynthetic