Admin Table of Contents
What is A correctly paired DNA molecule?
The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G)
Which DNA base pairs are correct?
A DNA molecule consists of 4 base pairs. They are adenine, guanine, cytosine and thymine—adenosine pairs with thymine using two hydrogen bonds. Thus, the correct base pairing is Adenine-Thymine: option (a).
What are DNA base pairs?
There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).
What are the basic pairing rules for DNA?
Base-pairing rule – the rule stating that in dna, cytosine pairs with guanine and adenine pairs with thymine add in rna, adenine pairs with uracil.
Why does a only bond with T and G only bond with C?
The structures complement each other, in a way, like a lock and a key. C will only bond with G and A will only bond with T in DNA. Because of complementary base pairing, the hydrogen-bonded nitrogenous bases are often referred to as base pairs.
What means base pairs?
A base pair is two chemical bases bonded to one another forming a “rung of the DNA ladder.” The DNA molecule consists of two strands that wind around each other like a twisted ladder.
What is a base pair simple definition?
base pair. n. The pair of nitrogenous bases that connects the complementary strands of DNA or of double-stranded RNA and consists of a purine linked by hydrogen bonds to a pyrimidine: adenine-thymine and guanine-cytosine in DNA, and adenine-uracil and guanine-cytosine in RNA.
What makes up the base pair of DNA?
A base pair is two chemical bases bonded to one another forming a “rung of the DNA ladder.” The DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.
How are the two strands of DNA held together?
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. Base pair describes the relationship between the building blocks on the strands of DNA.
What is the complementary base pairing rule for RNA?
Using the complementary base pairing rules, you can conclude that the complementary strand is: TTCGACCAAAACTGCTG. RNA strands are also complementary with the exception that RNA uses uracil instead of thymine. So, you can also infer the mRNA strand that would be produced from that first DNA strand.
How does the base pairing rule work for adenine?
Base Pairing Rule. Purine bases bond to pyrimidine bases. This happens because the shapes of purine and pyrimidine bases allow hydrogen bonds to form between the two. The base pairing rule states that adenine pairs only with thymine and guanine pairs only with cytosine.