Intro to cell biology Flashcards
What do phospholipids do in solution?
Micelle
Do prokaryotes have a nucleus?
NO
What do prokaryotes have?
Circular DNA
Cell wall
pill
flagellum
What are examples of eukaryotes?
plants
animals
Protists - Fungi/ Algae/ Protozoa
What does RER Do?
Synthesise proteins
What does Golgi do?
Glycosylation of proteins
What do lysosymes do?
breakdown proteins
What does cytoskeleton do?
maintain shape and integrity of cell
what are Proteins involved in cytoskeleton?
tubulin
actin
keratin
What does plant cell have?
chloroplast, cell wall
Does prokaryotes have any organelles >
NO only ribosomes
Are there introns in prokaryotes ?
NO
How many types of RNA polymerase in prokaryote ?
1 type
How does prokaryote divide?
Fission
What is interphase?
G1 > S> G2> Mitosis
What happens in G1 phase?
synthesis of enzymes for S phase
What happens in S phase?
DNA synthesis
- each chromosome has 2 chromatids
-DNA Doubles
Histone made
What happens in G2 phase?
microtubules made
protein synthesis stops
What is mitosis phase?
PMAT
What is prophase?
chromatin condense into chromosome
What is metaphase?
chromosome align in centre
What is anaphase?
Sister chromatids pulled apart to mitotic spindle
Division of membrane
What is Telophase?
nuclear envelope reforms and 2 daughter cells
Why is Virus a retrovirus?
RNA Genome
How does virus make DNA copy of its RNA genome?
reverse transcriptase
What are prions?
small protein infections- resist anything that would damage nucleic acids
What is an example of a prion disease?
Scrapie
How does prions cause disease?
conformational change in shape of prion protein so causes proteins nearby to change shape
What can prions cause?
Holes in brain so spongiform encephalopathesis
