Chapter 13

DNA contains many different genes that are transcribed into different ____________. a. proteins c. mRNAs, tRNAs, rRNAs b. mRNAs only d. all of the above

An RNA molecule is typically ___________. a. a double helix c. double-stranded b. single-stranded d. triple-stranded

An mRNA molecule is synthesized by _________. a. replication c. transcription b. duplication d. translation

Each codon specifies a (an) _____________. a. protein c. amino acid b. polypeptide d. mRNA

Anticodons pair with ___________. a. mRNA codons c. RNA anticodons b. DNA codons d. amino acids

Match the terms with the most suitable description. _____alkylating agent _____chain elongation _____exons _____genetic _____code _____anticodon _____introns _____codon a. parts of mature mRNA transcript b. base triplet for amino acid c. second stage of translation d. base triplet; pairs with codon e. one environmental agent that induces mutation in DNA f. set of 64 codons in mRNA g. the parts removed from a pre-mRNA transcript before translation