Because more than one codon can specify the same amino acid, the genetic code is said to be
A. redundant.
B. reverse.
C. repetitive.
D. degenerate.
E. wobbly.
Answer: D
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Water transport in xylem depends on ____________. (Select all correct answer options.)
A. hydrogen bonding between H2O molecules B. turgor pressure accumulating in the roots C. osmosis across the vessel plasma membranes D. solar energy
Many marine organisms incorporate carbon into their shells. After they die, these shells become part of the ____
a. atmosphere b. sediment c. ocean d. ocean food web e. land food web
Four of the five answers listed below are pure-breeding. Select the exception
a. AA BB b. Aa BB c. AA bb d. aa BB e. aa bb
Which of the following is a high-resolution light microscope technique for detecting interactions between proteins?
a. FRAP (fluorescence recovery after photobleaching) b. FRET (fluorescence resonance energy transfer) c. MPEM (multi-photon excitation microscopy) d. TIRF (total internal reflection)