Pain relievers such as endorphins and enkephalins
are
a. depressants.
b. stimulants.
c. analgesics.
d. hallucinogens.
e. antipsychotics.
Answer: c
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What does detection of a fluorescent signal from one of the spots of a DNA microarray indicate?
A. The probe hybridized to the sequences present in that spot B. The probe did not hybridize to that particular gene C. The experiment was not conducted correctly D. That the probe was non-specifically trapped by the material present in the spot.
The letter “E” in the above figure represents the
__________ fin. a. anal b. pelvic c. pectoral d. caudal e. dorsal
In the lactose operon, the repressor binds to:
a. the lacI coding region. b. the promoter. c. the operator. d. the lacZ coding sequence. e. the lacY coding sequence.
Staining is an important part of smear preparation for microscopic viewing. Which of the following staining procedures uses more than one stain?
A. Capsule stain B. All of the above C. Spore stain D. Staining for Tuberculosis agent