1) What is the triplet of bases found on mRNA called? a) codon b) anticodon c) amino acid d) peptide 2) What is the triplet of bases found on tRNA called? a) codon b) anticodon c) amino acid d) peptide 3) How many bases code for a single amino acid? a) one b) two c) three d) four 4) What is the correct base pairing rule for RNA? a) A-U and C-G b) A-G and C-U c) A-T and C-G d) T-U and C-G 5) Which of these isn't true of RNA? a) single stranded b) held together by complementary base pairing c) contains uracil d) contains ribose sugar 6) What is the correct order of stages for gene expression? a) transcription > translation > splicing b) splicing > transcription > translation c) translation > transcription > splicing d) transcription > splicing > translation 7) What is the function of rRNA? a) carries amino acids to the ribosome b) carries a complementary copy of a gene to the ribosome c) forms the ribosome along with proteins 8) What is the function of tRNA? a) carries amino acids to the ribosome b) carries a complementary copy of a gene to the ribosome c) forms the ribosome along with proteins 9) What is the function of mRNA? a) carries amino acids to the ribosome b) carries a complementary copy of a gene to the ribosome c) forms the ribosome along with proteins 10) Where does transcription take place? a) nucleus b) at the ribosome c) cytoplasm d) mitochondria 11) Where does translation take place? a) nucleus b) at the ribosome c) cytoplasm d) mitochondria 12) Where does splicing take place? a) nucleus b) at the ribosome c) cytoplasm d) mitochondria 13) Which enzyme is involved in transcription? a) DNA polymerase b) helicase c) RNA polymerase d) ligase 14) Which stage involves the formation of the mRNA by complementary base pairing? a) transcription b) translation c) splicing 15) Which stage involves the formation of a polypeptide chain? a) transcription b) translation c) splicing 16) Which stage involves the formation of the mature mRNA transcript? a) transcription b) translation c) splicing 17) What forms a polypeptide chain? a) Amino acids held together by peptide bonds b) Amino acids held together by hydrogen bonds c) Complementary base pairs held together by hydrogen bonds d) Complementary base pairs held together by peptide bonds 18) Which of these molecules leaves the nucleus? a) DNA b) primary mRNA c) mature mRNA 19) What process allows the formation of multiple polypeptide chains from one gene? a) complementary base pairing b) RNA synthesis c) hydrogen bonding d) alternative splicing 20) What interactions forms between amino acids in a polypeptide chain allowing it to form a 3D structure? a) hydrogen bonds b) peptide bonds

1.3 Gene Expression

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