QUESTION 10 In the following diagram, which is the C terminus of the protein?_ - Choose from ABCD. Which is the 5' end of the MRNA? B A O A. None of these answers is correct O B. C, A O C. B, D

The following is a portion of a protein: met-trp-tyr-arg-gly-pro-thr-Various mutant forms of this protein have been recovered. Using the normal and mutant sequences, determine the DNA and mRNA sequences that code for this portion of the protein, and explain each of the mutations. a. met-trp- b. met-cys-ile-val-val-leu-gln- c. met-trp-tyr-arg-ser-pro-thr- d. met-trp-tyr-arg-gly-ala-val-ile-ser-pro-thr-

An unprocessed pre-mRNA has the following structure. Which of the following is not a possible size (in bp) of the mature mRNA? 205bp 180bp 150bp 100bp

A scientist introduces a mutation that makes the 60S ribosomal subunit nonfunctional in a human cell line. What would be the predicted effect on translation? Translation stalls after the initiation AUG codon is identified The ribosome cannot catalyze the formation of peptide bonds between the tRNAs in the A and P sites The ribosome cannot interact with mRNAs tRNAs cannot exit the E site of the ribosome.

A part of an mRNA molecule with the sequence 5-UGC GCA-3 is being translated by a ribosome. The following activated tRNA molecules are available. tRNA Anticodon Amino Acid 3-GGC-5 Proline 3-CGU-5 Alanine 3-UGC-5 Treonine 3-CCG-5 Glycine 3-ACG-5 Cysteine 3-CGC-5 Alanine Which two of them can bind correctly to the mRNA so that a dipeptide can form? a. cysteinealanine b. prolinecysteine c. glycinecysteine d. alaninealanine e. threonineglycine

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

Which of the following statements is false? a. GTP is an energy source during various stages of translation. b. In the ribosome, peptidyl transferase catalyzes peptide bondformation between amino acids. c. When the mRNA code UAA reaches the ribosome, there isno tRNA to bind to it. d. A long polypeptide is cut off the tRNA in the A site so its Metamino acid links to the amino acid in the P site. e. Forty-two amino acids of a protein are encoded by 126nucleotides of the mRNA.

Briefly describe the function of the following in protein synthesis. a. rRNA b. tRNA c. mRNA

Energy that drives translation is provided mainly by ______ . a. ATP c. GTP b. amino acids d. ribosomes

Figure 28.41 gives some examples of recombination in IgG codons 95 and 96, as specified by the Vkand Jkgenes. List the codon possibilities and the amino acids encoded if recombination occurred in codon 97. Which of these possibilities is less desirable?