Which of the following statements about DNA is (are) true?
A) DNA contains thymine but not uracil.
B) DNA molecules contain deoxyribose.
C) In a double-stranded DNA molecule, adenine on one strand will be connected to thymine on
the complementary strand by two hydrogen bonds.
D) All of the above statements are true.
D) All of the above statements are true.
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Which muscle assists in pushing movements of the arm?
a. serratus anterior b. external oblique c. rectus abdominis d. latissimus dorsi e. trapezius
In eukaryotes, genes involved in transcription and translation are derived from ________.
A. ancient bacteria B. primitive RNA C. mitochondrial genomes D. archaeal ancestors
When chlorophyll absorbs photons, it transfers electrons to a primary acceptor, which is thereby oxidized
a. True b. False
What causes the inactivation of a G protein?
A. The alpha subunit hydrolyzes GTP to GDP and inorganic phosphate. B. The beta and gamma subunits trigger the hydrolysis of GTP to GDP. C. A phosphatase removes the inorganic phosphate group from GTP. D. The inactive receptor catalyzes the replacement of GTP by GDP.