The central dogma of biology can be stated as
A. DNA? RNA? proteins.
B. RNA? DNA? proteins.
C. DNA? proteins? RNA.
D. proteins? RNA? DNA.
Answer: A
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When a person gets an AIDS test, what is being tested?
a. antibodies against HIV b. complement against HIV c. antigens against HIV d. HIV particles themselves e. interferons against HIV
What is the purpose of the intestinal villi and microvilli?
a. increase surface for maximum absorption b. increase surface area for maximum infiltration of capillary beds c. decrease area for bacterial growth d. increase area for bacterial growth e. increase the area for the serosa
Humans are least closely related to the ____
a. chimpanzee b. lemur c. gorilla d. tarsier e. gibbon
How were conditions on the early Earth of more than three billion years ago different from those on today's Earth? Unlike Earth today, early Earth _____
A) had an atmosphere rich in gases released from volcanic eruptions B) had an oxidizing atmosphere C) experienced little high energy radiation from the sun D) had an atmosphere with significant quantities of ozone