required information\ndna molecules consist of chemically linked sequences of the bases adenine, guanine…

required information\ndna molecules consist of chemically linked sequences of the bases adenine, guanine, cytosine, and thymine, denoted a,\ng, c, and t. a sequence of three bases is called a codon. a base may appear more than once in a codon.\n\nthe bases a and g are purines, while c and t are pyrimidines. how many codons are there whose first and third bases are purines and whose second base is a pyrimidine?\nnumeric response

required information\ndna molecules consist of chemically linked sequences of the bases adenine, guanine, cytosine, and thymine, denoted a,\ng, c, and t. a sequence of three bases is called a codon. a base may appear more than once in a codon.\n\nthe bases a and g are purines, while c and t are pyrimidines. how many codons are there whose first and third bases are purines and whose second base is a pyrimidine?\nnumeric response

Answer

Explanation:

Step1: Count purine options (1st/3rd)

Purines are A, G: 2 options each.

Step2: Count pyrimidine options (2nd)

Pyrimidines are C, T: 2 options.

Step3: Calculate total codons

Multiply the number of options for each position: $2 \times 2 \times 2$

Answer:

8