-》Nucleoside-> Nitrogen base + sugar....
Nucleoside has 's' in it....& sugar has 's' in it...Just try to remember this way...
¤Adenine + pentose sugar-> Adenosine....
¤Guanine + pentose sugar-> Guanosine....
¤Cytosine + pentose sugar-> Cytidine....
¤Uracil + pentose sugar-> Uridine....
¤Thymine + pentose sugar-> Thymidine....
Remember in naming nucleosides ...U get "sine" at end in purines ....while u get "dine" at end in case of pyramidines...

-》Then the other one will be a Nucleotide itself...
Nucleotide-> Nitogen base + sugar + phosphate...
¤Adenine + pentose sugar + phosphoric acid -> Adenylic acid ....
¤Guanine + pentose sugar + phosphoric acid -> Guanylic acid....
¤Cytosine + pentose sugar + phosphoric acid -> Cytidylic acid....
¤Uracil + pentose sugar + phosphoric acid -> Uridylic acid....
¤Thymine + pentose sugar + phosphoric acid -> Thymidylic acid....
-》To remember Nitrogen bases...
learn a sentence " CUT Aloo Gobhi...
CUT is for pyramidines...
It denotes for :-
C- Cytosine..
U-> Uracil..
T-> Thymine..
Aloo & Gobhi is for purines...
It denotes for:-
A-> Adenine...
G-> Guanine....
( Or )
-》You can also remember
Purines by a sentence "Pure As Gold"...
It denotes for :-
Pure-> Purine...
As-> Adenine..
Gold-> Guanine...
& Pyramidenes by a sentence " Cut the py(pie)...
It denotes for :-
Cut-> Cytosine;Uracil;Thymine..
Py-> Pyramidine....Three are pyrimidines and two purines.
-》The other names for bases are:-
□ thymine (5-methyl-2,4-dioxipyrimidine),
□ cytosine (2-oxo-4-aminopyrimidine), and 
□uracil (2,4-dioxoypyrimidine)

□adenine (6-aminopurine) and 
□guanine (2-amino-6-oxypurine)

Nucleotides and Nucleosides of Nitrogenous Bases

Nucleotides and nucleosides are the building blocks of nucleic acids, which are essential for the storage and transmission of genetic information. Understanding the differences between these two molecules can be challenging, but there are some tricks to remember the key characteristics of nucleotides and nucleosides.

Nucleotides:

Nucleotides are molecules composed of three main components: a nitrogenous base, a sugar molecule, and a phosphate group. They are the monomers that make up nucleic acids, such as DNA and RNA. Here are some key points to remember about nucleotides:

1. Nitrogenous base: The nitrogenous base is a crucial component of nucleotides. There are two types of nitrogenous bases: purines and pyrimidines. Purines include adenine (A) and guanine (G), while pyrimidines include cytosine (C), thymine (T) in DNA, and uracil (U) in RNA.

2. Sugar molecule: The sugar molecule in nucleotides is either deoxyribose or ribose. Deoxyribose is found in DNA, while ribose is present in RNA. Remember that the "deoxy" in deoxyribose indicates the absence of an oxygen atom at the 2' position compared to ribose.

3. Phosphate group: Nucleotides also contain a phosphate group attached to the 5' carbon of the sugar molecule. This phosphate group is responsible for forming the phosphodiester bonds that link nucleotides together in DNA and RNA.

Nucleosides:

Nucleosides are similar to nucleotides, but they lack the phosphate group. They consist of a nitrogenous base and a sugar molecule, which are connected by a glycosidic bond. Here are some key points to remember about nucleosides:

1. Nitrogenous base: Like nucleotides, nucleosides also contain purines (adenine and guanine) and pyrimidines (cytosine, thymine, and uracil).

2. Sugar molecule: The sugar molecule in nucleosides is either deoxyribose or ribose, just like in nucleotides.

3. Absence of phosphate group: Unlike nucleotides, nucleosides lack the phosphate group attached to the sugar molecule.

Trick to remember:

To remember the difference between nucleotides and nucleosides, focus on the presence or absence of the phosphate group:

- Nucleotides have a phosphate group. Think of the "t" in nucleo"t"ide as representing the phosphate group, which is present in nucleotides.

- Nucleosides lack a phosphate group. The absence of the phosphate group in nucleosides can be remembered by the "s" in nucleo"s"ide, which stands for "sugar molecule only."

By remembering these key characteristics and using the trick of associating the "t" in nucleotide with the phosphate group, and the "s" in nucleoside with the absence of the phosphate group, you can easily