Which of the following is not a key advantage of wobble in the codon-anticodon r

Question

Which of the following is not a key advantage of wobble in the codon-anticodon reaction? a. It allows for fewer tRNAs in the cell. b. It allows for making more than one protein from the same coding sequence. c. It allows for a certain amount of mutation in the mRNA without affecting the protein sequence. d. All of these are advantages of wobble. Leader sequences for protein transport to specific organelles are removed by proteases associated with the: a. endoplasmic reticulum b. golgi apparatus c. nucleus d. mitochondra e. none of these The first tRNA (bearing fmet) binds to the a. "A" site of the ribosome. b. "P" site on the ribosome. c. "E" site on the ribosome. During elongation, tRNA binds initially to the a. "A" site on the ribosome. b. "P" site on the ribosome. c. "E" site on the ribosome. Which antibiotic confirmed that the growing peptide chain is transferred to the amino group of the incoming tRNA? a. Puromycin b. Streptomycin c. Cyclohexamide d. None of those antibiotics was useful for studying the mechanism of protein synthesis. e. None of these antibiotics actually interferes with peptide transfer. The ribosome is actually a ribozyme. a. True b. False The tRNAs may bind to the standard slop codons a. in cellular organelles which use a modified genetic code. b. to accommodate the tRNA for the unusual amino acid selenocysteine. c. when the anticodon in a tRNA mutates to a sequence which can hind. d. All of these In bacteria, each mRNA will bind to only one ribosome at a time. True False

Explanation / Answer

7. The second option wil not the key advantage for wooble rule. This is because unambiguous nature of codings allows making one type of protein.

8. The first option is correct. Endoplasmic reticulum is the main organelle.

9. The second option- P site is correct. The fmet-trNA complex binds.

10. The tRNA for elongation binds to P site or peptidyl site where elongation occurs through binding of amino acids. The second option is correct.

11. The first option is correct. Puromycin binds to A site of ribosome and then transfers to the peptidyl chain. After that the protein synthesis stops.

12. False, ribosome made of several proteins with rRNA sequences. Ribozymes are catalytic rRNA sequences that are only part of ribosomes.

13. All of these, all options can take effect of unprecedented binding of tRNAa.

14. False, a bacterium may consist of 20,000 ribosomes that make approximately 25% of the dry weight of the cell. Those are present to augment the process of protein synthesis therefore, the mRNA can binds to several riboosomes.

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