A.   Synthesis occurs in the 3' to 5' direction in DNA replication but in the 5' to 3' direction in RNA transcription

B.   In DNA replication the helix is never closed after it is opened by helicase, but once RNA polymerase has finished transcribing a region the double helix closes

C.   DNA replication produces a fundamentally different type of molecule than is produced by RNA transcription

D.   DNA replication occurs in the nucleus, and RNA transcription occurs in the cytoplasm

A.   5' UCCGA 3'

B.   3' TCCGA 5'

C.   3' UCCGA 5'

D.   5' TCCGA 3'

A.   A peptide bond forms between the amino acid attached to a tRNA in the A site and the growing polypeptide attached to a tRNA in the P site.

B.   During translation in eukaryotes, some ribosomes remain free in the cytoplasm while others attach to protein channels embedded in the rough ER.

C.   Ribosomes are composed of RNA and protein.

D.   During translation, an amino acid attached to a tRNA in the A site is transferred to a growing polypeptide attached to a tRNA in the P site.

A.   A single pre-mRNA can be spliced to form different mature mRNAs by including different sets of exons

B.   By translating different segments of a single mRNA molecule, ribosomes can produce different proteins

C.   By transcribing different segments of a single gene, RNA polymerase II can produce different mRNA molecules

D.   The genetic code is degenerate, so a single codon may code for several different amino acids

A.   shifting the reading frame for the codons downstream of the mutation

B.   preventing formation of the initiation complex during transcription.

C.   changing part of the active site of the enzyme

D.   causing early termination during the elongation cycle of translation.