The nucleus - 10

Question 1

What is the basic structure of the nucleus

Answer 1

Store place of inherited genes surrounded by the double membrane nuclear envelope

Question 2

What is the basic function of the nucleus

Answer 2

Controls cell function (turning genes on and off)

Stores most of cells DNA

Question 3

What are nuclear pores

Answer 3

Pores on the surface of nuclear envelope that are important for regulation

Question 4

What goes out of nuclear pores

Answer 4

Messenger RNA and DNA

Ribosomal subunits needed to build proteins

Question 5

What goes in through nuclear pores

Answer 5

Control signals
Building materials
Energy (proteins)

Question 6

Explain packaging of DNA

Answer 6

1. DNA double helix coils as it interacts with histones (protein) to form octamer.
2. Then wraps around less than 2x to become nucleosome.
3. Which then interacts with histones to coil again.
4. And then loops. In cell division they coil again to form chromosomes

Question 7

What is the change in diameter of DNA

Answer 7

2nm - 300nm

Question 8

What is the nucleo-cytoplasmic exchange

Answer 8

exchange of matter between the nucleus and cytoplasm

Question 9

What is euchromatin

Answer 9

Less dense region made of DNA that is used by the cell

Question 10

What is the region where DNA is not used called

Answer 10

Heterochromatin (dense region)

Question 11

What is the relationship between euchromatin and heterochromatin

Answer 11

They have a dynamic relationship and amounts of each can change