Which of the following layers lies next to the lumen
of the intestinal tract?
a. longitudinal muscles
b. circular muscles
c. submucosa
d. mucosa
e. serosa
Answer: d
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Which of the following molecules are able to
cut DNA molecules at specific sequences?
a. assembly enzymes b. hydrolytic enzymes c. restriction enzymes d. ligase enzymes e. repair enzymes
Select the best response to the question. ?What significant development has decreased the incidence of epiglottitis?
A) the administration of the Haemophilus influenza type B (Hib) vaccine B) advances in airway management C) early recognition of the symptoms D) the development of effective antibiotics
Describe the spatial patterns of light and nutrients in a lake, and explain why these patterns exist
What will be an ideal response?
The two strands of a DNA molecule contain nitrogen bases which are
A. parallel. B. complementary. C. identical. D. proportionate. E. random.