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  • Guanine is a ____ and it has ____ rings.Option: 1 Purine; singleOption: 2 Pyrimidine; doubl

Guanine is a ____ and it has ____ rings.

Option: 1

Purine; single


Option: 2

Pyrimidine; double;


Option: 3

Purine; double


Option: 4

Pyrimidine; single


Answers (1)

best_answer

Nucleotides 

  • Nucleotides are the monomer units of nucleic acids.
  • A nucleotide is made up of nucleoside and phosphate groups.
  • A nucleoside is made up of 5-carbon pentose sugar and a nitrogenous base.
  • There are two types of nitrogenous bases: purine and pyrimidine.
  • Purines have a double-ring structure. There are two types of purines - adenine and guanine
  • Pyrimidines have a single-ring structure. There are three types of pyrimidines - thymine, cytosine, and uracil.
  • A nitrogenous base is attached to the pentose sugar at the C-1 via the N-glycosidic bond. It is a covalent bond.
  • The phosphate group is attached to the C-5 via a phosphodiester bond.

 

 

                                                                

                                              

Guanine is a purine and it has double rings.

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seema garhwal

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