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A naturally occurring coding strand comp...

A naturally occurring coding strand composed of alternating C and U residues would result in the formation of

A

A polypeptide containing alternating leu and ser residues

B

A polypeptide containing either leu or ser residues

C

A polypeptide containing only leu residues

D

A polypeptide containing only ser residues

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the naturally occurring coding strand composed of alternating C and U residues, we can follow these steps: ### Step 1: Understand the Coding Strand The coding strand is composed of alternating cytosine (C) and uracil (U) residues. This means the sequence can be represented as: C U C U C U C U ... ### Step 2: Determine the Codons In the genetic code, each set of three nucleotides (codon) corresponds to a specific amino acid. For the sequence we have: - The first codon: CUC - The second codon: UCU - The third codon: CUC - The fourth codon: UCU - And so on... ### Step 3: Translate Codons to Amino Acids Using the genetic code: - CUC codes for Leucine (Leu) - UCU codes for Serine (Ser) ### Step 4: Identify the Pattern From the alternating sequence: - The sequence will produce Leucine (Leu) from CUC and Serine (Ser) from UCU. - Therefore, the resulting polypeptide will contain alternating Leucine and Serine residues. ### Conclusion The naturally occurring coding strand composed of alternating C and U residues would result in the formation of a polypeptide containing alternating Leucine and Serine residues. ### Final Answer The correct option is: **A polypeptide containing alternating leucine and serine residues.** ---
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