Nucleus Flashcards
(17 cards)
What cellular process does the nucleus facilitate with its molecular machinery?
DNA replication.
What is the nucleus often called in a cell?
Command center.
What type of synthesis occurs in the nucleus?
RNA synthesis.
How does the nucleus generally appear within a cell?
Rounded or oval structure.
What is the space called that separates the two membranes of the nuclear envelope?
Perinuclear space.
How many membranes does the nuclear envelope have?
Two concentric membranes.
With what is the outer nuclear membrane continuous?
Rough Endoplasmic Reticulum (RER).
What is the inner nuclear membrane associated with?
Nuclear lamina.
What bridges the inner and outer nuclear membranes?
Nuclear pore complexes.
What is the small, dense mass of heterochromatin present in females called?
Sex chromatin or Barr body.
What are the two types of chromatin?
Heterochromatin and euchromatin.
What are the basic proteins that DNA in chromatin associates with for structural support?
Histones.
What is each long DNA double helix with its associated proteins called?
Chromatid.
What are the members of each chromosomal pair called?
Homologous chromosomes.
What is formed after DNA replication when two chromatids are held together by cohesin proteins?
Chromosome.
What term describes cells with pairs of chromosomes, such as somatic cells?
Diploid.
What are sperm cells and mature oocytes classified as regarding chromosome number?
Haploid.
