Question

1. the proportions of the bases are consistent within a species; however they do vary between species. using the base - pair rules, complete the following table to show the percentage of each type of base in the five different organisms.

Explanation:

Step1: Recall base - pair rules

In DNA, adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C). So \(A = T\) and \(G=C\), and \(A + T+G + C=100\%\)

Step2: Complete for Human

Since \(A = 31\%\), then \(T=31\%\) (because \(A=T\)). Given \(C = 19\%\), then \(G = 19\%\) (because \(G = C\))

Step3: Complete for Cow

Since \(A = 28\%\), then \(T=28\%\) (because \(A=T\)). Given \(G = 22\%\), then \(C = 22\%\) (because \(G = C\))

Step4: Complete for Salmon

Since \(T = 29\%\), then \(A=29\%\) (because \(A=T\)). Given \(C = 21\%\), then \(G = 21\%\) (because \(G = C\))

Step5: Complete for Wheat

Since \(A = 27\%\), then \(T=27\%\) (because \(A=T\)). Let \(G = C=x\). Then \(27+27 + 2x=100\), \(2x=100-(27 + 27)=46\), \(x = 23\%\). So \(G = 23\%\) and \(C = 23\%\)

Step6: Complete for Yeast

Since \(A = 31\%\), then \(T=31\%\) (because \(A=T\)). Given \(G = 19\%\), then \(C = 19\%\) (because \(G = C\))

Answer:

Organism	Adenine	Guanine	Cytosine	Thymine
Cow	\(28\%\)	\(22\%\)	\(22\%\)	\(28\%\)
Salmon	\(29\%\)	\(21\%\)	\(21\%\)	\(29\%\)
Wheat	\(27\%\)	\(23\%\)	\(23\%\)	\(27\%\)
Yeast	\(31\%\)	\(19\%\)	\(19\%\)	\(31\%\)