Cell Structure, Function and Organisation

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Cell Structure, Function and Organisation

Main topic

Cell Structure and Function

Cell is the basic unit of life consisting of a mass of living matter called protoplasm which is a nucleus within a mass of cytoplasm bounded by cell membrane.

centriole

animal cells only

chloroplast

plant cell only

mitochondrion

vacuole

cellulose cell wall

plant cells only

nucleus

Nucleolus present is involved in protein production

Contain genetic materials in strutures called chromatin threads

During cell division, chromatin threads condenses to form highly-coiled structures called chromosomes.

Surrounded by a double-layered membrane called nucler envelope/membrane

Contain denser protoplasm called nucleoplasm

cytoplasm

Site where chemical reaction occur

Includes organelles,various membranes and fluid in which everything is suspended in cytosol

cell membrane

Function

Transfer chemical messages

Keeps cell content in place

Protective layer

Controls the movement of substance going in and out of the cell

only allows certain substances to pass through it, and not others

Structure

Partially permeable

i.e with numerous pores allowing only certain small molecules to pass through