1.4 Cells

What is Prokaryotic Cell Wall made of?

peptidoglycan

What are the Chromosomes present inside Nucleus like?

helical DNA with histone protein coat

What is Fungi Cell Wall made of?

Chitin

What is the largest organelle?

Nucleus

Chromatin

Coils of DNA and proteins (histones). When cells aren’t dividing they are organised in this form

Heterochromatin

Inactive

Dark under microscope

Euchromatin

Active

Light under microscope

Nucleolus

Location of DNA that codes for rRNA for ribosome manufacturing

Nuclear envelope

double membrane (narrow space between membranes). Outer membrane is encrusted with riboomes and is site of origin of RER

Nuclear pores

allows DNA code (mRNA) to leave nucleus and enter cytoplasm where protein synthesis takes place on ribosomes. Molecules can also enter nucleus

Nucleus Function

Control Centre

DNA codes for proteins made in cytoplasm

DNA is protected from damage caused by cell reactions