What is the difference between an ionic and covalent bond?
A) Ionic bonds form between atoms of different elements; covalent bonds form between atoms of the same element.
B) In an ionic bond, one atom has more electronegativity than the other; in a covalent bond, the atoms have the same electronegativity.
C) Ionic bonding involves the inner electron shells; covalent bonding involves the valence electron shell.
D) In an ionic bond, one atom accepts electrons from the other; in a covalent bond, a pair of atoms share electrons.
Answer: D
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A gene that codes for a protein was removed from a eukaryotic cell and inserted into a prokaryotic cell. Although the gene was successfully transcribed and translated, it produced a different protein than it produced in the eukaryotic cell. What is the most likely explanation?
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Multiple origins of replication on the DNA molecules of eukaryotic cells serve to
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