The complete set of hereditary information carried by

The complete set of hereditary information carried by an organism is its
A.  chromosome.
B.  genome.
C.  double helix.
D.  gene.
E.  nucleotide.


In DNA, the number of times one strand crosses over the other in space is its
A.  twisting number.
B.  positive supercoiling number.
C.  writhing number.
D.  negative supercoiling number.
E.  linking number.


DNA replication is semiconservative, meaning that
A.  one of the two daughter duplexes consists of both original parental strands.
B.  for each daughter duplex, only one of the parental strands is used as a template for both daughter strands.
C.  each daughter duplex may differ in sequence from the parental duplex.
D.  each daughter duplex consists of one parental strand and one newly synthesized daughter strand.
E.  each daughter duplex has sections of original parental duplex and sections of newly synthesized daughter duplex.