How many codons specify the amino acid leucine?
a. 2
b. 3
c. 4
d. 5
e. 6
ANSWER: e
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During the process of diffusion, solutes move ________ their concentration gradient.
a. down b. up c. across d. the solutes do not move during diffusion
Genetically modified (GM) salmon have now been approved for sale in the United States. What environmental concern has been expressed about these salmon? What is being considered to reduce this risk?
What will be an ideal response?
Negatively charged subatomic particles that have almost no mass are called
A. polymers. B. neutrons. C. ions. D. electrons. E. protons.
Cytosine deamination is a common mutation that results in a cytosine being converted to a uracil. See Figure (a) below. What is the repair mechanism used to restore the correct base?
A. nucleotide excision repair B. mismatch repair C. base excision repair