Which structure of the heart is attacked by the immune system in a case of rheumatic fever?
a. aorta
b. vena cava
c. myocardium
d. heart valves
e. sinoatrial node
D
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Which of the following describes the gel electrophoresis technique?
a. Separating molecules based on their size and charge b. Making multiple copies of DNA for further analysis c. Creating multiple copies and expressions of genes d. Modifying an organism’s DNA to achieve certain traits
Human papillomavirus infects
a. blood. b. bone tissue. c. mucus membranes. d. brain tissue. e. muscle tissue
he term "archenteron" refers to the developing:a
gut. b. lung. c. notochord. d. nerve tube. e. skin.
Which is a difference between prokaryotes and eukaryotes?
A) Prokaryotes have DNA, whereas eukaryotes have RNA. B) Prokaryotes have a nucleoid, whereas eukaryotes have a nucleus. C) Prokaryotes have RNA, whereas eukaryotes have DNA. D) Prokaryotes have a nucleus, whereas eukaryotes have a nucleoid. E) Prokaryotes have a cell wall, but eukaryotes do not.