30. Translation always occurs on which of the following structures? b. c. Nuclea

Question

30. Translation always occurs on which of the following structures? b. c. Nuclear envelope d. Mitochondria 31. Which of the catalyzes protein s a. Ribosomes are inactive after protease digestion. b. Ribosomes are inactive after RNase digestion. oal byroving ants is true and provides evidence that a certain component of the ribosome ynthesis? that proteins occupy the catalytic site where peptide bonds are formed. anows ihat mRNA occupies the catalytic site where peptide bonds are formed. c. Structural analysis shows 32. Eukaryotic ribosomes recognizo and initially bind to what structure on the m a. A Shine-Dalgarno sequence b. The 7-methylguanosine cap c. A TATA sequence d. A CCAAT sequence 33. The first step in the initiation of protein synthesis is the binding of to the . a. initiation factors; initiation codon b. initiation factors; small ribosomal subunit c. the small ribosomal subunit; initiation codon d. the initiator tRNA; initiation codon 34. Termination of translation and release of the polypeptide chain occurs when a. tRNA binds to a termination codon via a complementary anticodon but lacks an amino acid. b. a protein release factor binds to the termination codon. c. a tRNA with a complementary anticodon binds to a termination codon, and a release factor bound to the CCA end releases the chain d. a small molecule shaped like puromycin binds to the termination codon. 35. The amount of a protein in a cell is regulated by the rate of a. transcription of its gene b. translation of its mRNA. c. degradation of the protein. d. All of the above 36. siRNAs act primarily to inhibit a. transcription, by binding to specific genes. b. transcription, by formation of heterochromatin. C, translation, by blocking ribosomal attachment. d. translation, by binding to an mRNA. 37. The correctly folded three-dimensional configuration of a protein is determined primarily by the a. sequence of nucleotides of its gene b. primary sequence of its amino acids. c. chaperones with which it interacts. d. pathway by which it folds 38. Proteins that facilitate the folding of other proteins are called a. foldases. b. binding proteins c. chaperones d. escorts. © 2016 Sinauer Associates, Inc.

Explanation / Answer

30) A. ribosomes

31) D. Structural analysis showed that mRNA occupies catalytic site where peptide bonds are formed.

32) B. The 7-methylguanosine cap

34) B. a release factor binds to the termination codon

35) B, translation of its mRNA

36)A. Transcription, by binding to specific genes.

37) B. Primary sequence of its amino acid.

38) C. Chaperones

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