Answer:
C
Concepts:
Dna
- Reverse spelling: A. N. D
- First Letter: D
- Spelling: D. N. A
'DNA' is usually defined as: deoxyribonucleic acid: an extremely long macromolecule that is the main component of chromosomes and is the material that transfer genetic characteristics in all life forms, constructed of two nucleotide strands coiled around each other in a ladderlike arrangement with the sidepieces composed of alternating phosphate and deoxyribose units and the rungs composed of the purine and pyrimidine bases adenine, guanine, cytosine, and thymine: the genetic information of DNA is encoded in the sequence of the bases and is transcribed as the strands unwind and replicate.
Rna
- Reverse spelling: A. N. R
- First Letter: R
- Spelling: R. N. A
'RNA' is usually defined as: ribonucleic acid: any of a class of single-stranded molecules transcribed from DNA in the cell nucleus or in the mitochondrion or chloroplast, containing along the strand a linear sequence of nucleotide bases that is complementary to the DNA strand from which it is transcribed: the composition of the RNA molecule is identical with that of DNA except the substitution of the sugar ribose for deoxyribose and the substitution of the nucleotide base uracil for thymine.
Nitrogenous
Containing nitrogen
Nitrogen
A colorless, odorless, gaseous element that constitutes about four-fifth of the volume of the atmosphere and is present in combined form in animal and vegetable tissues, especially in proteins: used chiefly in the manufacture of ammonia, nitric acid, cyanide, explosives, fertilizer, dyes, as cooling agent, etc. Symbol: N; atomic weight: 14.0067; atomic number: 7; density: 1.2506 g/l at 0°C and 760 mm pressure.
Cytosine
A pyrimidine base, C4H5N3O, that is one of the fundamental components of DNA and RNA, in which it forms a base pair with guanine. Symbol :C.
Guanine
A purine base, C5H5N5O, that is a fundamental constituent of DNA and RNA, in which it forms base pairs with cytosine. Symbol: G.
Step-by-step explanation:
Nitrogenous Bases are of two types:
Purine: Contains two heterocyclic ring. Eg. Adenine, Guanine.
Pyrimidine: Contains one heterocyclic ring. Eg. Cytosine, Thymine, Uracil.
Nitrogenous bases in DNA(Deoxyribonucleic acid):
Adenine: 6–Amino purine.
Guanine: 2-Amino-6-oxypurine.
Cytosine: 4-Amino-2-oxypyrimidine.
Thymine: 2,4-Dioxy-5-methyl pyrimidine.
Nitrogenous bases in RNA(Ribonucleic acid):
1. Adenine: 6-Amino purine.
2. Guanine: 2-Amino-6-oxypurine.
3. Cytosine : 4-Amino-2-oxypyrimidine.
4. Uracil: 2,4-Dioxy pyrimidine.
In DNA and RNA , nitrogenous bases are bonded by Hydrogen bonds.
Thanks.
- Eddie