What is the structural feature that allows DNA to replicate?
A) sugar-phosphate backbone
B) complementary pairing of the nitrogenous bases
C) disulfide bonding (bridging) of the two helixes
D) twisting of the molecule to form an ?-helix
E) three-component structure of the nucleotides
Answer: B
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Fill in the blank with the appropriate word.
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a. eyes. b. jaws. c. gill slits. d. mouth.
An individual has an issue with their red blood cells. Are they most likely to have an issue with their
immunity, oxygen transport, or hemostasis? What will be an ideal response?
If atom X contains 14 protons, 13 electrons, and 12 neutrons, and atom Y contains 14 protons, 14
electrons, and 12 neutrons, then you conclude that:a. Y is an ion but X is not. b. X and Y are both ions. c. X and Y both have filled valence shells. d. X and Y are isotopes of the same element. e. X and Y are atoms of the same elem