concept 6.3: the eukaryotic cell's genetic instructions are stores in the nucleus and carried out by the ribosomes

where is DNA found in a eukaryotic cell

most DNA is in the nucleus and some is found in the mitochondria in the form of mitochondria DNA or mDNA

what do ribosomes do with DNA

DNA is copied into RNA which is then read by ribosomes to produce proteins

what is the nuclear envelope

a double membrane with each membrane consisting of a phospholipid bilayer that encloses the nucleus and separates it from the cytoplasm

what do nuclear pores do

they regulate the entry and exit of molecules into and out of the nucleus

how is DNA organized in the nucleus

into discrete units called chromosomes

describe a chromosome

each chromosome contains one DNA molecule associated with proteins called chromatin

what is the nucleolus

located in the nucleus, it is the site of ribosomal synthesis

what do ribosomes do

build proteins

what are ribosomes made of

make of ribosomal RNA and protein

what 2 places do ribosomes build proteins

in the cytosol in the form of free ribosomes and outside of the endoplasmic reticulum or nuclear envelope in the form of bound ribosomes

what do free ribosomes produce

enzymes and proteins to be used in the cytoplasm

what do bound ribosomes produce

produce proteins destined for secretion for organelles or for insertion into the plasma membrane