Concept explainers
a.
To determine:
The reason behind the little effect on biological activity of the enzyme if base substitution for that enzyme replaces leucine with alanine.
Introduction:
DNA consists of two complementary strands and when alteration occurs, it also changes the corresponding
b.
To determine:
The effect on amino acid in the protein if a base substitution replaces cytosine in the codon UCA with adenine.
Introduction:
DNA consists of two complementary strands and when alteration occurs, it also changes the corresponding nucleotide in opposite strand during next replication. The change that occurs in a single nucleotide is termed as base substitution.
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GENERAL ORGANIC+BIOL...-MASTERINGCHEM.
- If a codon consists of two nucleotides, how many codons would be possible? Would this be a workable code for the purpose of protein synthesis?arrow_forwardThe base sequences in mRNA that code for certain amino acids are Glu: GAA, GAG Val: GUU, GUC, GUA, GUG Met: AUG Trp: UGG Phe: UUU, UUC Asp: GAU, GAC These sequences are complementary to the sequences in DNA. a. Give the corresponding sequences in DNA for the amino acids listed above. b. Give a DNA sequence that would code for the peptide trp-glu-phe-met. c. How many different DNA sequences can code for the tetrapeptide in part b? d. What is the peptide that is produced from the DNA sequence TACCTGAAG? e. What other DNA sequences would yield the same tripeptide as in part d?arrow_forward(a) How many tripeptides can be made from glycine, alanine, and leucine, using each amino acid only once per tripeptide? (b) Write the structural formulas of these tripeptides and name them in the shorthand abbreviation used for showing amino acid sequences.arrow_forward
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