Ch 6 Part 1 Flashcards
(38 cards)
Nucleus
holds genetic information (DNA)
Blueprints for making proteins
Nucleus
Site of transcription: instruction code is copied by mRNA
Nucleus
Ribosomes
carry out instructions for synthesizing proteins
Ribosomes are the site of ___ : protein synthesis based on mRNA
Translation
Where are Ribosomes located?
Cytoplasm
Chromatin
Complex of DNA and proteins
Nucleolus
Site of ribosomal RNA (rRNA) synthesis and ribosome assembly
Nuclear Envelope
Part of the endomembrane system
Mediates transport in and out of nuclear envelope
nuclear pores
Nuclear lamina
Protein filaments lining the inside of nuclear envelope
maintains the shape of the nucleus
nuclear lamina
Are ribosomes membrane bound?
no
Two subunits of a ribosome
large subunit small subunit
Both ribosome subunits are made of ___ and ___
protein and RNA (rRNA)
Ribosomal protein is made in the ___, ribosomal RNA is made in the ____. Protein and RNA come together in the ___, and performs its function in the ____
cytosol, nucleolus, nucleolus, cytosol
Ribosomes are “Protein factories” in the ___
cytosol
Ribosomes are also found in
Prokaryotes Mitochondria Chloroplasts
What kinds of cells would have lots of ribosomes?
cells that need a lot of protein
“Free” Ribosomes
Remain free in the cytosol while making protein
“Free” Ribosomes make Type __ proteins
Type 1
“Bound” Ribosomes
Attached to the outside of the Rough ER
“Bound” Ribosomes make Type __ proteins
Type 2
What is the endomembrane system?
A system of directly or indirectly associating membrane