A)Pauling proposed three support strands while Watson and Crick proposed two strands.
B)Pauling proposed the support strands ran down the middle of the molecule while Watson and Crick proposed the support strands ran down the sides.
C)Pauling proposed that the bases stick out the sides of the molecule while Watson and Crick proposed the bases were paired in the middle.
D)All of the choices describe how Pauling's model was different than Watson and Crick's model.

A)The photographs indicated that DNA has a double helix structure.
B)The photographs showed equal numbers of purines and pyrimidines.
C)The photographs showed the bases of DNA were held together by hydrogen bonds.
D)The photographs revealed the structure of the deoxyribose sugar.
E)The photographs showed the location of each adenine,guanine,cytosine,and thymine.

A)Many scientists believed that DNA was not the genetic material because,with only four types of nucleotides,DNA did not have enough variability to store information.
B)Scientists focused on carbohydrate and protein in their studies of possible genetic material since they knew that genes were on chromosomes and that chromosomes were made of carbohydrate and protein.
C)Many scientists thought that proteins had a greater capacity for storing information because proteins contain 20 amino acids that could be sequenced differently.
D)Some scientists thought that RNA was likely to be the genetic material.