Chapter 9

A chromosome contains many different gene regions that are transcribed into different _____. a. proteins b. polypeptides c. RNAs d. a and b

A binding site for RNA polymerase is called a _____. a. gene b. promoter c. codon d. protein

An RNA molecule is typically ______ ; a DNA molecule is typically _____. a. single-stranded; double-stranded b. double-stranded; single-stranded c. both are single-stranded d. both are double-stranded

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

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

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

What is the maximum length of a polypeptide encoded by an mRNA that is 45 nucleotides long?

_____ are removed from new mRNA transcripts. a. Introns b. Exons c. Telomeres d. Amino acids

Where does transcription take place in a typical eukaryotic cell? a. the nucleus b. ribosomes c. the cytoplasm d. \(b\) and \(c\) are correct

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

Each amino acid is specified by a set of _____ bases in an mRNA transcript. a. 3 b. 20 c. 64 d. 120

_____ different codons constitute the genetic code. a. 3 b. 20 c. 64 d. 120

_____ can cause mutations. a. Replication errors b. Transposons c. Ionizing radiation d. Nonionizing radiation e. \(b\) and \(c\) are correct \(f\). all of the above

Match the terms with the best description. a. protein-coding segment b. gets around c. read as base triplets d. removed before translation e. occurs only in groups f. complete set of 64 codons g. binding site for RNA polymerase genetic message _____ promoter _____ polysome _____ exon _____ genetic code ____ intron ____ transposable element _____