Monozygotic twin concordance values are less than 100% in both bipolar disorder and schizophrenia. This suggests that these disorders ____
a. are strictly polygenic
b. have environmental components
c. are X-linked
d. genetically dominant
e. are not genetically based
b
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The most prevalent human infectious diseases are caused by
A) bacteria. B) viruses. C) fungi. D) protozoans.
The concept of a prokaryote was first fully outlined in 1962 by
A. Hershey and Chase. B. Gilbert and Cech. C. Stanier and Van Niel. D. Watson and Crick.
Binding of _____ to _____ in DNA can increase the rate of transcription of specific genes
a. activators; promoters b. enhancers; promoters c. repressors; operators d. repressors; promoters e. enhancers; operators
Gastropods are the most numerous group of mollusks and include the ________
A) clams and oysters B) snails and slugs C) squid and octopi D) scallops and nautiluses