Which of the following processes requires a carrier protein?
A. exocytosis only
B. facilitated diffusion only
C. active transport only
D. endocytosis only
E. both facilitated diffusion and active transport
Answer: E
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Giardia cysts are able to withstand
A) chemical disinfection. B) filtration. C) clarification. D) chemical disinfection, filtration, and clarification.
Hereditarianism is the idea that all human traits are ____
a. partly influenced by environment b. traceable to our earliest ancestors c. influenced equally by genes and environment d. determined only by genes e. immutable from generation to generation
What separates the strands of DNA in the polymerase chain reaction (PCR) technique?
A. Centrifuge B. Heat C. Restriction enzymes D. Helicase
During the development following fertilization, the morula becomes a hollow ball of cells called the
A) conceptus. B) fetus. C) germ layer. D) blastocyst. E) secondary morula.