BMS04-1037- Cell nucleus and cell division

What is the difference between heterochromatin and euchromatin?

What is the site of DNA coding for ribosomal RNA and the synthesis/assembly of ribosomal subunits?

How many layers is the nuclear envelope?

What allows for communication across the nuclear membrane?

How do larger molecules (>9nm) enter the nucleus?

What is the structure of a chromatin?

What is the structure of a nucleosome?

Highly condensed genes are ...
Open genes are...

What do centromeres do?

What does the kinetochore do?

What are telomeres?

What are they for?

What makes them?

What is the karyotype?

Humans have ... chromosomes made up of ... autosomal homologous pairs and ... pair of sex chromosomes

Most chromosomes are ..., sex gamates are ...

What is polypoid?

What is aneuploid?

Interphase is made of:
G1
S
G2
What do they do?

Mitosis and cytokinesis takes .... and is ... and ... dependant

What is the G0 phase?

What is the R point in the cell cycle?

Which phase?
Nucleur envelope breaks down, chromosomes attach to spindle via kinetochromes

Which phase?
Kinectorchore microtubules shorten, sister chromatids seperate
Cytokinesis begins as actin band contracts

Which phase?
Chromosomes condense, nucleolus disappears, spindle begins to form (aided by centrosome)

Which phase?
Chromosomes line up along metaphase plate

Which phase?
Spindle disappears
Nucleus envelope reforms
Chromosomes decondense

How does the spindle form?

What initiates mitosis?

What peaks during mitosis and must be degraded to exit it?

What are the two subunits of S phase promoting factor?

Homologous chromosomes are held together with?

What is the purpose of meiosis?

Mitosis vs meiosis?