Who is the scientist who discovered that the amount of thymine is always equal to adenine and the amount of guanine is always equal to cytosine?
Who is the scientist who discovered that the amount of thymine is always equal to adenine and the amount of guanine is always equal to cytosine?
Erwin Chargaff
Who had previously shown that the ratio of the amounts of adenine to thymine?
In 1950, biochemist Erwin Chargaff published a paper stating that in the DNA of any given species, the ratio of adenine to thymine is equal, as is the ratio of cytosine to guanine. This set of rules became known as Chargaff’s ratio, and it was an important clue for solving the structure of DNA.
Who was the first person to report DNA had equal parts of adenine thymine and guanine cytosine?
Levene
Who identified that the concentration of adenine was always the same as the concentration of thymine?
Chargaff’s
Why can’t guanine and adenine join together?
Two purines and two pyrimidines together would simply take up too much space to be able to fit in the space between the two strands. This is why A cannot bond with G and C cannot bond with T. The only pairs that can create hydrogen bonds in that space are adenine with thymine and cytosine with guanine.
What does adenine pair up with?
Base Pair The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
What does RNA contain that DNA does not?
It differs from DNA chemically in two respects: (1) the nucleotides in RNA are ribonucleotides—that is, they contain the sugar ribose (hence the name ribonucleic acid) rather than deoxyribose; (2) although, like DNA, RNA contains the bases adenine (A), guanine (G), and cytosine (C), it contains the base uracil (U) …
Is RNA found in humans?
Yes, human cells contain RNA. They are the genetic messenger along with DNA. The three main types of RNAs are: Ribosomal RNA (rRNA) – present associated with ribosomes.
What are the 4 types of RNA and how do they function?
On the basis of molecular size and function, the four types RNA are : (i) Messenger RNA (mRNA) (ii) Transfer RNA (tRNA) (iii) Ribosomal RNA (rRNA) (iv) Heterogenous nuclear RNA (hn RNA).