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Question Completion Status: www 2.1 points QUESTION 37 If the image below is an electron micrograph showing the result of an experiment in which DNA and RNA were bolled and hybridized together, which of the strands of DNA is the coding (sense) strand? A. B. A B с. 2.1 points Save an QUESTION 38 Which of the following consititutes evidence that the genetic code is non-overlapping? cleotide delations disrupt function

QUESTION 38 2.1 points Which of the following comes evidence that the genetic code is non-overlepping! Tor 2 edede deletion rupt function Seotide deletions sommes restore function A point mutationis a single amino acid There are 61 amino acid-encoding codons but only 20 amino acids 2.1 points See QUESTION 39 Which of the following contes evidence that the genetic code is a recode, le groups of nucleotides encodes cachod A point mutation dirupts a single amino acid Seuleotide deletion sometimes restore protein function There are o amino acid-encoding codons but only 20 min Mitations in the 3rd base of a codon are less than others to we amino acids 2.1 points QUESTION 40 What is an advantage of a degenerade gente code? Mutations are less likely to protein sequence decreasing the chances that a mutation will have to consenso organism Mutations are more likely to after proteins, increasing the role of evolution it increases the number of possible proteins that can be coded by each one All of the bove

ya Mutations are more likely to alter proteins, increasing the rate of evolution It increases the number of possible proteins that can be coded by each gene. All of the above 2.1 QUESTION 41 If we had only 3 different DNA/RNA nucleotide bases, how many different amino acids could be coded for by strings of 3 of these nucleotides? QUESTION 42 Imagine that you repeat the tRNA Selection experiment with modifications as follows: 1. Synthesize mRNA containing A's and G's only (poly-AG in random order). Ironwort the amino acid Glutamic acid (Gl) on its tRNA to the amino acid Glutamine (Gln) as shown below.

2 points QUESTION 42 Imagine that you repeat the tRNA Selection experiment with modifications as follows: 1. Synthesize mRNA containing A's and G's only (poly AG in random order). 2. Convert the amino acid Glutamic acid (Glu) on its tRNA to the amino acid Glutamine (Gin) as shown below 3. Mix your poly AG RNA, your artificial RNA, and cell extract contains ribosomes, amino acids, all normal tanas, and the energy source for translation) Glu Gin ماه ما CUC CUC Glutamic acid (Gl) is encoded by GAA and GAG, while Glutamine (Gin) is encoded only by CAA and CAG Given this, and based on what you know about tRNA selection will Glutamine (Gin) be found in the resulting polypeptides? (Assume translation will happen even without a start codon.) Yes, because the amino acid is selected based on the RNA anticodon sequence No, because the ribosome selects the RNA based on the attached amino acid Yes, because all of the normal RNAs, including RNA in are present in the assay. None of the above

Which of the following sporte tortranslation in the words what directly in which need code corresponds to ist which amino acid The room The RNA ANA Syntace QUESTION 44 2.1 points Sare home Shown below is the end of mRNA Transion of this mRNA should begin todenumbered_(Enter the number only: 1 notone' + + 5. 10 11 12 11 14 15 16 17 5' GCU A AUAUGC AGCA AGC - 3 2.1 points Save QUESTION 45 Which of the following is REQUIRED FOR Cortona import into the rough ER? Asignal peptide Agnal recognition particle (SRP) SRP receptor Ao the above None of the above

QUESTION 46 Which of these would be expected to start out with a signal peptido? (Select all that apply) ras OOOOOOOOO Tubulin p53 Phosphofructokinase-1 (3rd enzyme in glycolysis) Histone proteins Lysosomal digestive enzymes Pancreatic digestive enzymes The FGF17 receptor (a receptor tyrosine kinase) Signal peptidase The protein hormone insulin, secreted by pancreatic islet cells QUESTION 47

QUESTION 47 1.5 points Lane w Based on everything we have learned in this class we can confidently say that each sister chromatid in this image is comprised of All entirely new DNA copied from the original parental chromosome. One strand of DNA from the original parental chromosome and one entirely new strand. DNA entirely from the original parental chromosome. Either entirely old, parental DNA or entirely newly synthesized DNA

QUESTION 48 1.5 points Based on everything we have learned in this class we can confidently say that the sister chromatids in this image are: Identical Homologous to each other Complementary to each other Single-stranded 1.3 points SVEN