Question

question 1 (5 points) saved listen whats the function of the start codon of an mrna sequence? a) the start codon protects the mrna from being degraded. b) the start codon acts as a checkpoint in the eukaryotic cell cycle. c) the start codon signals for the ribosome to release the mrna sequence. d) the start codon signals for the ribosome to begin assembling amino acids at that point in the mrna sequence. question 2 (5 points) listen in a series of experiments, griffith infected mice with nonvirulent r - strain bacteria and highly virulent s - strain bacteria. heat - killed s bacteria were nonvirulent. however, the nonvirulent heat - killed s bacteria and the nonvirulent r bacteria together produced a virulent mixture. what did this demonstrate? a) the molecules present on the outside of bacteria determine whether its virulent or nonvirulent. b) the s - strain bacteria had not been killed completely. c) the translation of proteins, carbohydrates, lipids, and dna is important in determining bacterial virulence. d) a transforming principle in the s bacteria allowed the nonvirulent r strain to become virulent.

Explanation:

For Question 1: The start codon (AUG) on mRNA signals the ribosome to start translating the mRNA sequence into a polypeptide chain by assembling amino - acids. For Question 2: Griffith's experiment demonstrated that there was a transforming principle in the heat - killed S bacteria that could transform the nonvirulent R bacteria into virulent bacteria.

Answer:

Question 1: D. The start codon signals for the ribosome to begin assembling amino acids at that point in the mRNA sequence.
Question 2: D. A transforming principle in the S bacteria allowed the nonvirulent R strain to become virulent.