Describe two important interactions that occur between the nitrogenous bases of nucleic acids
What will be an ideal response?
1) Hydrophobic or base-stacking interactions that minimize contact of the bases with water. This interaction is very important for stabilization of the DNA helix.
2) Base pairing, which results from the hydrogen-bonding capacity of ring nitrogens, ring carbonyl groups, and exocyclic amino groups.
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Food and drink are prevented from entering the respiratory passageways during swallowing by means of the:
a. glottis b. pharynx c. epiglottis d. larynx e. trachea
Characterize the pineal gland
What will be an ideal response?
In dehydration synthesis, the atoms that make up a water molecule come from
A) enzymes. B) oxygen. C) only one of the reactants. D) carbohydrates. E) both of the reactants.
While examining a fungal colony, a student described the colony as cerebriform. Was she describing the color, texture or morphology of the colony?
A) Color B) Texture C) Morphology