Question

1. identify what are the sides of the dna \ladder\ made of?

critical thinking

1. apply concepts imagine that you are a scientist studying dna. you measure the number of cytosines and thymines in a small strand of dna. there are 45 cytosines and 55 thymines. how many guanines are there in the strand? how many adenines are there?

Explanation:

Step1: Recall base - pairing rules

In DNA, cytosine (C) pairs with guanine (G), and adenine (A) pairs with thymine (T).

Step2: Determine the number of guanines

Since C pairs with G, if there are 45 cytosines, then the number of guanines is 45.

Step3: Determine the number of adenines

Since A pairs with T, if there are 55 thymines, then the number of adenines is 55.

Answer:

There are 45 guanines and 55 adenines.