Cell Biology 1 Flashcards
1
Q
Building Blocks
A
- sugars
- lipids
- proteins
- nucleic acids
2
Q
A typical human cell contains :
A
- one nucleus
- ribosomes
- one endoplasmic reticulum
- a golgi apparatus
- mitochondria
- lysosomes
- vesicles
2
Q
Classification of cells
A
- all cells contain DNA which encodes information needed to make all the substances that are required
Prokaryotic cells do not have a nucleus
Eukaryotic cells do contain a nucleus
Prokaryotic cells do not contain organelles and have small circular DNA
3
Q
Electron Microscope
A
- resolves fine structure of the cell organelles
- uses a beam of electrons which has a very short wavelength for better resolution
- special sample prep is required
4
Q
Cytoplasm
A
- space between plasma membrane and nucleus
- PH= 7
- metabolic activities
- water based gel
5
Q
Nucleus
A
- most prominent cellular compartment
- 5-10 % of cell volume
- contains DNA
- prokaryotes contain free small circular DNA ring
6
Q
Functions of the nucleus
A
- safe storage of DNA
- site of DNA replication
- site of transcription
