Cells and organelles Flashcards
1
Q
What are the properties of prokaryotes?
A
- one enclosing membrane or no membrane at all
- most simple is bacteria
- up to few thousandths of mm
2
Q
What are the properties of eukaryotes?
A
- internal membranes
- found in human, animal and plant cells
- up to ten thousandths of a mm
3
Q
How is DNA packaged in a prokaryote in protein expression?
A
DNA is packages but not enclosed by a membrane
4
Q
How is DNA packaged in a eukaryote in protein expression?
A
DNA is packaged and enclosed by the double membrane in the nucleus
5
Q
What is chromatin?
A
complex formed when DNA is packaged with proteins called histones
6
Q
What are the three main systems that eukaryotes belong to?
A
- protein expression system
- secretion pathway system
- uptake and degradation system
7
Q
How does uptake take place?
A
endocytosis by the endosomes
8
Q
How does degradation take place?
A
by the lysosomes
9
Q
What are the three parts of the cytoskeleton?
A
microtubules
microfilaments
intermediate filaments
