DNA replication is usually unidirectional. (True or false?)

DNA replication is usually unidirectional.
 
  Indicate whether this statement is true or false.

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One end of a strand of DNA is different from the other end.
 
  Indicate whether this statement is true or false.

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Adenine binds to thymine via three hydrogen bonds.
 
  Indicate whether this statement is true or false.

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RNAi
 
  A. is the form of mRNA that initiates translation.
  B.
  uses short pieces of single-stranded RNA to direct the degradation of specific RNA transcripts.
 
  C. is a mechanism of genetic regulation found in eukaryotes.
  D. is any chemical that inhibits transcription.
  E.
  uses short pieces of single-stranded RNA to direct the degradation of specific RNA transcripts AND is a mechanism of genetic regulation found in eukaryotes.

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CAP
 
  A. is involved in positive control.
  B. stands for cyclic amp protein.
  C. works in conjunction with cAMP.
  D. is involved in negative control.
  E. is involved in positive control AND works in conjunction with cAMP.