AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of these people was an American scientist who discovered that certain nitrogen bases are always equal in any sample of DNA?
A
Rosalind Franklin
B
Erwin Chargaff
C
James Watson
D
Maurice Wilkins
Explanation: 

Detailed explanation-1: -In other words, there was always an equal amount of adenine and thymine, as well as cytosine and guanine, in each sample of DNA. Moreover, Chargaff stated that despite differences in the amounts of each base found within any given species.

Detailed explanation-2: -Erwin Chargaff found that in DNA, the ratios of adenine (A) to thymine (T) and guanine (G) to cytosine (C) are equal. This parity is obvious in the final DNA structure.

Detailed explanation-3: -In 1950, biochemist Erwin Chargaff found that the arrangement of nitrogen bases in DNA varied widely, but the amount of certain bases always occurred in a one-to-one ratio. These discoveries were an important foundation for the later description of DNA.

Detailed explanation-4: -As a biochemist at Columbia University in the 1940’s, Dr. Chargaff discovered regularities among the four chemical units of DNA known as bases, pointing directly to its role as the hereditary material of living organisms.

There is 1 question to complete.