16. What provides the energy for rho-dependent chain termination? (2 pt) a. ATP

Question

16. What provides the energy for rho-dependent chain termination? (2 pt) a. ATP hydrolysis distinct from any incorporation b. Nucleotide hydrolysis associated with incorporation into the chain. c. Torsional stress built into the separating DNA strands. d. There is no energy requirement. into the chain 17. What is the template for protein synthesis? (2 pt) a. a mRNA strand b. the DNA coding strand c. the DNA template strand d. a protein primer e. None of the above 18. AminoacyltRNA Synthetases are involved in which step of translation? (2 pt) a. activation b. initiation c. elongation d. termination e. None of the above 19. The genetic code is said to be degenerate. What does this mean? (2 pt) a. each codon codes for more than one amino acid. b. each anticodon can interact with many different triplet sequences in the mRNA, which may differ in any or all of the three nucleotides. c. many of the amino acids are coded for by different codons. d. the code is universally used by virtually all species. e. None of the above 20. Which below are restriction enzymes useful for genetic recombination work? (2 pt) a. They cut DNA in the middle of specific sequences. b. They cut DNA independent of the source of the DNA c. They often generate single stranded tails or "sticky ends" d. There are a large variety of them commercially available. e. All of the above. 4

Explanation / Answer

16. Option A

17. Option A. The form of RNA that mediates the transfer of genetic information from the cell nucleus to ribosomes in the cytoplasm, where it serves as a template for protein synthesis.

18. In elongation, amino acids are brought to the mRNA as amino-acyl tRNAs and are added one at a time to a growing polypeptide chain.

19. None of the above. There are more codon combinations than there are amino acids. The genetic code is degenerate because more than one codon sequence can code for the same amino acid.

20. All the above

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