What are the building blocks of nucleic acids?

Nucleic acids are polynucleotides—that is, long chainlike molecules composed of a series of nearly identical building blocks called nucleotides. Each nucleotide consists of a nitrogen-containing aromatic base attached to a pentose (five-carbon) sugar, which is in turn attached to a phosphate group.
A.

What are the three subunits of a nucleotide?

A nucleotide consists of three things:
  • A nitrogenous base, which can be either adenine, guanine, cytosine, or thymine (in the case of RNA, thymine is replaced by uracil).
  • A five-carbon sugar, called deoxyribose because it is lacking an oxygen group on one of its carbons.
  • One or more phosphate groups.
  • What is a subunit of a protein?

    In structural biology, a protein subunit is a single protein molecule that assembles (or "coassembles") with other protein molecules to form a protein complex. Some naturally occurring proteins have a relatively small number of subunits and therefore described as oligomeric, for example hemoglobin or DNA polymerase.
  • How are nucleotides arranged?

    A strand of DNA contains chemicals called nucleotides and a DNA molecule is made up of 2 polynucleotide chains arranged on the double helix (the backbone). These nucleotides are composed of three parts: a phosphate, a sugar (deoxyribose), and a type of compound base.
  • What is a subunit of DNA?

    The subunits are the sugar-phosphates and nucleotides (adenine, guanine, cytosine and thymine for DNA, adenine, guanine, cytosine and uracil for RNA). The sugar-phosphate backbone is the out edge of the twisted "ladder" you typically see in drawings of DNA and RNA. It is what holds the molecule together.
B.

What are the three main components of a nucleotide?

There are only three components to a nucleotide:
  • A sugar (called deoxyribose)
  • A Phosphate (1 phosphorus atom joined to 4 oxygen atoms)
  • One of 4 bases (Adenine, Guanine, Cytosine, Thymine)
  • How are nucleotides arranged?

    A strand of DNA contains chemicals called nucleotides and a DNA molecule is made up of 2 polynucleotide chains arranged on the double helix (the backbone). These nucleotides are composed of three parts: a phosphate, a sugar (deoxyribose), and a type of compound base.
  • What is a nucleotide and what is it made up of?

    Nucleotides are the building blocks of nucleic acids; they are composed of three subunit molecules: a nitrogenous base, a five-carbon sugar (ribose or deoxyribose), and at least one phosphate group. They are also known as phosphate nucleotides. A nucleoside is a nitrogenous base and a 5-carbon sugar.
  • How do nucleotides form the structure of DNA?

    A nucleotide is made up of one sugar molecule, one phosphate molecule and one of the four bases. Here is the structural formula for the four nucleotides of DNA. Note that the purine bases (adenine and guanine) have a double ring structure while the pyrimidine bases (thymine and cytosine) have only a single ring.

Updated: 26th September 2018

Rate This Answer

5 / 5 based on 2 votes.