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<span>To verify the purity of a
colony, a number of steps could be adopted. Pick the colony and dissolve it in sterile
water (approximately 5ml), streak in media again and incubate. Observe if it
produces pure colonies of the chosen organisms and if not, repeat the procedure
until pure colonies are produced. Additionally, one could perform additional tests
that categorize bacteria such as Gram staining. </span>
I don't even know the answer sorry
Answer:
A. Yes, because the %A approximately equals the %T and the %G approximately equals the %C in both species.
Explanation:
According to Chargaff's rule, in all cellular DNAs, the number of adenosine residues (A) is equal to the number of thymidine residues (T). And the number of guanosine residues (G) is equal to the number of cytidine residues (C). Therefore, the sum of the purine residues equals the sum of the pyrimidine residues (A+ G= C+ T). It is based on the fact that a purine base always pairs with a pyrimidine base in a double helix DNA.
Chargaff’s rule is followed in all the double-helical DNA molecules irrespective of the species. In DNAs of sea urchin and salmon, the percentage of adenine is equal to that of the thymine and the percentage of guanine is equal to that of the cytosine. Therefore, Chargaff's rule is followed.
I think it is D hope I’m right
