Which of the following chemical properties or interactions of purines and pyrimidines does not affect the structure and function of nucleic acids?
A. planar nature of bases due to resonance
B. tautomerism of the bases
C. absorbance of UV light
D. hydrophobic stacking
E. base pairing
C
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Joints are found only in the appendicular skeleton.
a. true b. false
When __________ is uncovered and myosin can bind to it, contraction of a muscle can occur when ATP is utilized.
A. actin B. myosin C. tropomyosin D. troponin
Which one of the following effects is NOT the effect of auxin?
A. Promotes growth by cell enlargement B. Promotes apical dominance C. Stimulates formation of roots on a shoot D. Stimulates division of shoot apical meristem cells E. Stimulates development of lateral buds
Which phosphorylation mechanism for recharging ADP to ATP is incorrectly matched with its description?
A) Substrate-level phosphorylation: A phosphate is transferred to ADP from a high-energy substrate after passing through an electron transport chain. B) Photophosphorylation: Passes electrons energized by solar energy through an electron transport chain C) Oxidative Phosphorylation: Passes electrons stripped from nutrients through an electron transport chain D) The descriptions for oxidative phosphorylation and photophosphorylation are incorrectly matched. E) The descriptions for oxidative phosphorylation, photophosphorylation, and substrate-level phosphorylation are incorrectly matched.