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A chromosome contains many genes that are transcribed into different ________. a. proteins b. polypeptides c. RNAs d. a and b

RNAs form by ________ ; proteins form by ________ . a. replication; translation b. translation; transcription c. transcription; translation d. replication; transcription

In cells, most RNA molecules are ________ and DNA molecules are ________. a. single-stranded; double-stranded b. double-stranded; single-stranded c. double-stranded; double stranded

The main function of a DNA molecule is to ________. a. store heritable information b. carry a translatable message c. form peptide bonds between amino acids

The main function of an mRNA molecule is to ________ . a. store heritable information b. carry a translatable message c. form peptide bonds between amino acids

Where does transcription take place in a prokaryotic cell? a. the nucleus b. ribosomes c. the cytoplasm d. b and c are correct

Most codons specify a(n) ________ . a. protein b. polypeptide c. amino acid d. mRNA

Where does translation take place in a eukaryotic cell? a. the nucleus b. ribosomes c. the cytoplasm d. b and c are correct

A mutation called a (n) ________ often results in a frameshift that garbles the genetic message. a. deletion b. insertion c. base-pair substitution d. a or b

Gene expression does not vary by ________ . a. cell type b. extracellular conditions c. stage of development d. the genetic code