Question

Use the section of mRNA found below: 5' UCUAACCGAGU 3' beginning with the start codon, which amino acids, in order, are coded for by this section of mRNA?

a) Serine - Asparagine - Proline
b) Leucine - Asparagine - Arginine
c) Serine - Asparagine - Glutamine
d) Leucine - Asparagine - Serine

Answer 1

The section of mRNA 5' UCUAACCGAGU 3' codes for the amino acids Serine - Asparagine - Arginine in order, which corresponds to option (b).

Step-by-step explanation:

To determine which amino acids are coded by the given section of mRNA, we need to translate the nucleotide sequence into corresponding amino acids using the genetic code. The mRNA sequence provided is 5' UCUAACCGAGU 3'. Assuming the presence of a start codon upstream, we can directly read the codons from this sequence.

• UCU codes for Serine (Ser/S)
• AAC codes for Asparagine (Asn/N)
• CGA codes for Arginine (Arg/R)

Therefore, starting with the start codon, the amino acids, in order, coded for by this section of mRNA are Serine - Asparagine - Arginine, which corresponds to option (b).