Question

Photo 51 is a picture of the structure of DNA that was used to create a model of DNA. Who created the photo?
James Watson and Francis Crick
Erwin Chargaff
Rosalind Franklin
Friedrich Miescher

Answer 1

James Watson was shown the photo by Maurice Wilkins without Rosalind Franklin's approval or knowledge (although by this time Gosling had returned to the supervision of Wilkins). Along with Francis Crick, Watson used characteristics and features of Photo 51 to develop the chemical model of the DNA molecule.

Answer 2

so its rosalind?

Answer 3

No, this would be A.

Answer 4

Which best describes a codon?
a cell structure that gives the master instructions for an organism
a segment of DNA that is the basis of heredity in organisms
the sequence of three bases that codes for a specific amino acid
the basic unit of structure and function of all living things

Answer 5

The best description of a codon is that the sequence of three bases codes is for a specific amino acid. The answer is letter C.

Answer 6

The structure of DNA resembles a twisted ladder. Which structural components form the rungs of the ladder?
deoxyribose sugars
phosphate groups
nitrogenous base pairs
ribosomes

Answer 7

The structural components that form the rungs of the ladder are the nitrogeneous bases of the DNA molecule. These bases are adenine, guanine, cytosine and thymine.

Answer 8

Which best describes a gene?
different allele forms of a trait
tightly coiled strands of DNA
the center of a chromosome
a segment of chromosomal DNA