Question

A DNA strand has the following sequence of nucleotides:

guanine, cytosine, adenine, adenine, thymine, guanine

a) What will the mRNA sequence be?
b) How many amino acids will the mRNA code for?
c)How many codons will the mRNA have?
What are the anticodons on the tRNAs that will bond to the mRNA?

Answer 1

A base-paired DNA sequence
guanine, cytosine, adenine, adenine, thymine, guanine

to solve for a) What will the mRNA sequence be?

you must first transfer the DNA sequence into an RNA sequence and that is by using the same nucleotides except you replace thymine with uracil.

Answer 2

So G, C, A, A, T, G.
For a. the mRNA sequence will be complimentary bases to the DNA. So for a rough idea C, G ............. remember T will be substituted for U! RNA does not contain Thymine.
b. Use this chart to help you name each codon as an amino acid (3 base pairs in a sequence) gives 1 amino acid. (better to do this step after c.)
c. Codons is a sequence of three bases, like G,C,A 1 codon = 1 amino acid.
d. tRNA bases are complementary to mRNA instead of T for thymine you will put U for uracil.