How many nitrogenous bases are present in DNA?
Main function of a nitrogenous base is to act as building blocks of DNA and RNA.
there are 5 nitrogenous bases:- Adenine,Guanine,Thymine,Cytosine and Uracil.
BUT IN DNA URACIL IS ABSENT AND IN RNA THYMINE IS ABSENT
Nitrogenous bases in DNA: Adenine,Thymine,Guanine and Cytosine
Nitrogenous bases in RNA: Adenine,Uracil,Guanine and Cytosine
That's why there are only 4 bases present in RNA and 4 bases in DNA.
More Info:
en.wikipedia.org
What are your thoughts on this subject?
37 Comments
Cari G.
Conats to our newest author!
Merri Sillery
4 in DNA; A, G, C and T and 4 in RNA; A, G, C and U. The question asks specifically for DNA.
Merri Sillery
Jorge Arenas Calderon, DNA does not contain uracil (U) RNA does, the question specifies DNA.
Merri Sillery
Donna R. O'Brien Moran, DNA does not contain uracil (U) RNA does, the question specifies DNA.
Merri Sillery
Jean Lugg, DNA does not contain uracil (U) RNA does, the question specifies DNA.
Merri Sillery
Mike Martin, DNA does not contain uracil (U) RNA does, the question specifies DNA.
Merri Sillery
teacherchicky, 4 in DNA A, G, C and T and 4 in RNA A, G, C and U. The question asks specifically for DNA.
Ilias Tsiabardas
4 = A,C,T,And G,
mopar
Glad I guessed 4
Terry Masterson
Incorrect...as teacherchicky said, there is five and I also checked google and wikipedia.
teacherchicky
I checked Google AND Wikipedia and both said there are 5, so I believe this author's answer is incorrect! Quizclub NEEDS to have factcheckers to make sure these answers are current and correct!
Barb Schmidt
mixed up the 4 and 5, oh well
rjmw
Incorrect, there are five.
Mike Martin
A set of five nitrogenous bases is used in the construction of nucleotides, which in turn build up nucleic acids like DNA and RNA. These nitrogenous bases are adenine (A), uracil (U), guanine (G), thymine (T), and cytosine (C).
Chris Braid
Went for 5, which, obviously, I thought was right. Not sure about this question and answer!