nucleus

types of proteins found in intermediate filaments

epithelial; keratin

myocytes; desmin

connective tissue; vimentin

astrocytes(supporting cells of the nervous system); GFAP(Glial Fibrillar Acidic Protein)

mention the components of the nuclear envelope

outer membrane; continuous with the RER

phospholipids

cholesterol

nuclear pores

inner membrane

lamina proteins

differentiate btn chromatin and chromosomes

chromatin | chromosome

present all times present only during cell division

not visible under a microscope visible under a microscope

DNA is loose and widely spread DNA is tightly coiled and highly

through the nucleus coiled

roles of the histone

condenses DNA allowing its packing in the nucleus

regulates genes by loosening or tightening the DNA

differentiate between euchromatin and heterochromatin

euchromatin is readable DNA whereas heterochromatin is unreadable DNA

what stimulates the histone to loosen and tighten the DNA

loosen; acetylation

tighten; methylation

what is a nucleosome

what are hemosiderin granules

these complex stores for iron in a cell. they hv protein ferritin on which iron binds onto

syptoms of hemosiderosis

excessive iron uptake in the cell

increased lysis of red blood cells

impaired iron utilization

what causes tissue damage in terms of iron

hemochromatosis