An anticodon is 5' CGA 3'. The codon that pairs with the anticodon will be a) 3'UGC5' b) 5'GCT3' c) 5' UCG3' d) 5'TCG3 4 Listen An anticodon is 5'CGA3'. This amino acid will be put into the protein when the RNA molecule with this anticodon is used. Use the codon table below UUU UUC UUA C CUU CUC CUA CUG AUU AUC AUA AUG GUU GUC GUA GUG } a) LEU b) ARG c) SER d) ALA Phe Leu Leu lle Met Val UCU UCC UCA UCG CCU CCC CCA CCG ACU ACC ACA ACG GCU GCC GCA GCG Ser Pro Thr Ala UAU UAC UAA UAG CAU CAC CAA CAG AAU AAC AAA ;} AAG GAU GAC GAG} Tyr Stop His Gln Asn Lys Asp Glu UGU UGC UGA UGG CGU CGC CGA CGG. AGU AGC AGA AGG GGU GGC GGA GGG Cys Stop Trp Arg Ser Arg Gly

Figure 15.16 Many antibiotics inhibit bacterial protein synthesis. For example, tetracycline blocks the A site on the bacterial ribosome, and chloramphenicol blocks peptidyl transfer. What specific effect would you expect each of these antibiotics to have on protein synthesis? Tetracycline would directly affect: tRNA binding to the ribosome ribosome assembly growth of the protein chain Chloramphenicol would directly affect tRNA binding to the ribosome ribosome assembly growth of the protein chain

A certain mRNA strand has the following nucleotide sequence: 5AUGACGUAUAACUUU3 What is the anticodon for each codon? What is the amino acid sequence of the polypeptide? (Use Figure 13-5 to help answer this question.) Figure 13-5 The genetic code The genetic code specifies all possible combinations of the three bases that compose codons in mRNA. Of the 64 possible codons, 61 specify amino acids (see Figure 3-17 for an explanation of abbreviations). The codon AUG specifies the amino acid methionine and also signals the ribosome to initiate translation (start). Three codonsUAA, UGA, and UAGdo not specify amino acids; they terminate polypeptide synthesis (stop).

In the gene-coding sequence shown here, which of the following events will produce a frameshift after the last mutational site? a. insertion of an A after the first codon b. deletion of the second codon (AAA) c. insertion of TA after the second codon and deletion of CG in the fourth codon d. deletion of AC in the third codon

If the genetic code uses triplets, how many different amino acids can be coded by a repeating RNA polymer composed of UA and UC (UAUCUAUCUAUC ...)? a. one b. two c. three d. four e. five

Is an entire chromosome made into an mRNA during transcription?

_______ are removed from new mRNAs. a. Introns c. Poly-A tails b. Exons d. Amino acids

How many kilobases of the DNA strand below will code for the protein product?

Eukaryotic mRNA: usessnRNPs to cut out introns and seal together translatableexons. uses a spliceosome mechanism made of DNA to recognizeconsensus sequences to cut and splice. has a guanine cap on its 39 end and a poly(A) tail on its 59 end. is composed of adenine, thymine, guanine, and cytosine. codes the guanine cap and poly(A) tail from the DNAtemplate.

Consequences of the Wobble Hypothesis Point out why Cricks wobble hypothesis would allow fewer than 61 anticodons to be used to translate the 61 sense codons. How might wobble tend to accelerate the rate of translation?