Chapter 8

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

Muscle cells differ from bone cells because they ________. a. have different genes b. use different genes c. are eukaryotic d. both a and b

A cell with a Barr body is ________ . a. prokaryotic b. a sex cell c. from a female mammal d. infected by Barr virus

Put the following processes in order of their occurrence during expression of a eukaryotic gene: a. mRNA processing b. translation c. transcription d. RNA leaves nucleus

Which of the following statements is not correct? a. Some gene expression patterns can be passed to an individual's offspring. b. Expression of a master regulator triggers a gene expression cascade. c. \(X\) chromosome inactivation is necessary for normal development of male mals.

Match each term with the most suitable description. methylation insertion promoter genetic message differentiation exon ribosome a. cells become specialized b. protein-coding segment c. epigenetic d. assembles amino acids e. read in threes f. extra nucleotides g. regulatory site