What is meant by a primary structure of a nucleic acid ?

Primary structure of a nucleic acid refers to the sequence of nucleotides in a polynucleotide chain. 
120 Views

Describe nucleotides.

Nucleotides are the basic unit of nucleic acids. It has three components which are chemically distinct :

(1) Nitrogen containing ring organic compound or heterocyclic compound. It can be adenine, guanine, cytosine, thymine (in DNA), uracil (in RNA). 

(2) A pentose sugar. The pentose sugar is ribose in case of RNA and 2' deoxyribose in case of DNA. 

(3) A molecule of phosphoric acid.


273 Views

Give two examples of proteins which transport materials.

Proteins which transport materials are :

(1) Haemoglobin. It transports oxygen to all the parts of the body.

(2) P-protein. This transports organic materials through, phloem in plants.

114 Views

Advertisement

What are the basic units of :
(1) DNA (2) RNA ?


The basic units of DNA and RNA are :

(1) Deoxyribonucleotide is the basic unit of DNA.

(2) Ribonucleotide is the basic unit of RNA.

118 Views

Advertisement
What are macromolecules ? Give examples.

Macromolecules are molecules that have a molecular weight in the range of ten thousand and above. They are usually formed by polymerisation of small molecules such as sugars, amino acids and nucleotides. Examples proteins, polysaccharides and nucleic acids.
152 Views

Advertisement