Which are the smallest organisms? [Part 1]

Virus: - The Porcine circovirus 2 is a single stranded DNA virus having a capsid diameter of 17 nm.

Nanobe:- Nanobes are thought by some to be the smallest known organism, about one tenth the size of the smallest known bacteria.

Mycoplasma genitalium:- a parasitic bacterium which lives in the primate genital and respiratory tracts, is thought to be the smallest known organism capable of independent growth and reproduction. With a size of approximately 200 to 300 nm.

Trick: Remember nitrogen base paring in a DNA

There are 4 base pairs:

* Adenine
* Thymine
* Cytosine
* Guanine

And paring is as follows:

Adenine-Thymine
Cytosine-Guanine

The simplest way to remember the paring is by the code, this wil never confuse you ever ;)
"GCAT"

P.S. The cat image is used just to add colors to the blog :)

What is the difference between an organelle and an organ?

An organ is a collection of cells that perform a function (liver, skin, muscles)
whereas
an organelle is something INSIDE a cell which performs a function for the cell (ribosome, mitochondria)