Lecture 4 Flashcards
What is Cell division in bacteria known as?
Binary Fission
What does FtsZ do in bacterial cell division?
It forms a ring like structure in the centre which creates a septum in the cell membrane which divides cells
What happens in G1?
The cell grows
What happens in S?
Replication of DNA
What happens in G2?
Cell prepares for mitosis
What is interphase comprised of?
G1, S, G2
What is G0?
A specialized resting phases
What do chromosomes look like during interphase?
They are decondensed and referred to as a chromatin but are orderly in territores
What do nuclear pores allow for?
Entry and exit of molecules
What is in the function of the Nucleolus
Ribosomal RNA production and ribosomes assembly
What does Cohesin do?
Wraps around the sister chromatids and holds them together starting from s phase
What does Tubulin do?
Attaches to centromeres and pulls sister chromatids apart
what is the function of the Kinetochore?
Acts as a docking platform for the mitotic spindle fiber at the centromere
What are microtubules made of?
Tubulin
What do spindle poles do ?
Produce microtubules
What is another name for Spindle Poles?
Microtubule-organizing centres (MTOCs). Centrosomes in animals and Spindle pole bodies in yeast and other fungi
What are Centrosomes composed composed of?
Centrioles and the Pericentriolar Matrix
What does Condensin do?
In metaphase it further compacts chromosomes
What is Anaphase triggered by?
Cohesin degradation
What does n represent?
The number of chromosomes in a cell
What does c represent?
The amount of DNA in base pairs
How many chromosomes?
46
What is the n value for a somatic cell?
2n
What is the c value in gametes?
1c
What is the c value in G1?
2c
What is the c value in G2?
4c
What is the purpose of mitosis?
Maintain continuity and stability during cell division
What is the purpose of meiosis?
Generate variability and diversity
what is the n and c number at the end of meiosis?
1n and 1c
What the n and c values of gemetocytes?
2n and 4c
