Strands of the backbone of DNA are parallel?
a. true
b. false
Ans: b. false
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In general, when cytosine bases in CpG islands are methylated:
A. transcription is active and rapid. B. transcription is active, but slow. C. transcription is repressed. D. translation is active and rapid. E. translation is repressed.
DNA repair mechanisms occur
A. only in prokaryotes. B. only in eukaryotes. C. in both eukaryotes and prokaryotes. D. in neither eukaryotes or prokaryotes.
What is the main difference between amphibians and reptiles?
A) Reptiles are tied to water for reproduction, while amphibians have amniotic eggs that can survive on dry land. B) Amphibians are tied to water for reproduction, while reptiles have amniotic eggs that can survive on dry land. C) Neither are tied to water for reproduction. D) There is little difference between amphibians and reptiles.
What tissue type is characterized by being a transport medium for nutrients and also includes blood and adipose tissues?
A. connective tissue B. muscle tissue C. epithelial tissue D. nervous tissue