Chapter 14, Problem 14
Early detection and adherence to a strict dietary regimen have prevented much of the intellectual disability that used to occur in those with phenylketonuria (PKU). Affected individuals now often lead normal lives and have families. For various reasons, such individuals tend to adhere less rigorously to their diet as they get older. Predict the effect that mothers with PKU who neglect their diets might have on newborns.
Video transcript
A short RNA molecule was isolated that demonstrated a hyperchromic shift (see Chapter 10), indicating secondary structure. Its sequence was determined to be
5'-AGGCGCCGACUCUACU-3'
If the molecule were an internal part of a message, what amino acid sequence would result from it following translation? (Refer to the code chart in Figure 13.7.)
A short RNA molecule was isolated that demonstrated a hyperchromic shift (see Chapter 10), indicating secondary structure. Its sequence was determined to be
5'-AGGCGCCGACUCUACU-3'
If the molecule were a tRNA fragment containing a CGA anticodon, what would the corresponding codon be?
Refer to Figure 13.7 to respond to the following:
Shown here is a hypothetical viral mRNA sequence:
5'-AUGCAUACCUAUGAGACCCUUGGA-3'
Assuming that it could arise from overlapping genes, how many different polypeptide sequences can be produced? What are the sequences?
Most proteins have more leucine than histidine residues, but more histidine than tryptophan residues. Correlate the number of codons for these three amino acids with this information.