Question

procedure: below is a single strand of dna. transcribe the strand by filling in the blanks with the comple - mentary m - rna nucleotides (remember that t will be replaced with u as you are creating rna). dna strand: c g t a a t g c g t c a m - rna: a group of three m - rna nucleotides is called a codon. each codon calls for one specific amino acid. how many codons are in the m - rna strand above? __________ go back to the large dna molecule on the front table. how many m - rna codons would be produced by this dna strand if it were transcribed? __________

Explanation:

Step1: Determine number of nucleotides in m - RNA

The m - RNA strand has 12 nucleotides (from the filled - in blanks: G C A U U A C G A U U A).

Step2: Calculate number of codons

Since a codon is a group of three nucleotides, we divide the total number of nucleotides by 3. So, $\frac{12}{3}=4$.

Answer:

4