L11 The Nucleus and DNA

1

(Choose all correct.)
The nucleus:

1

The membrane of the nucleus is the:

1

Choose the incorrect statement about the nucleus.

1

What is the consequence of a dysfunctional nuclear lamina? (Choose all correct.)

1

Choose the incorrect statement about the nuclear pores.

1

How much DNA is in the human nucleus?

1

DNA is packed in the nucleus so that it is inaccessible until replication.

1

The DNA double helix is about ❌nm in diameter. Bundled into ❌ or "beads" using ❌ histone proteins, it is about ❌nm in diameter. Further interaction with ❌ histone proteins ❌ this into a ❌nm fibre. During replication this can be ❌ to form a ❌nm diameter ❌.

2

nucleosomes

H2a, H2b, H3, and H4

10

H1

30

looped

coils

300

metaphase chromosome

interphase chromosome

1

Which kind of chromatin is the denser, inactive form?

1

• Describe the basic structure and function of the nucleus. • Describe the structure of the nuclear pore complex and its role in nucleo-cytoplasmic exchange. • Describe the organisation of DNA within the nucleus. • Outline the functional differences between euchromatin and heterochromatin.

L11 The Nucleus and DNA

(Choose all correct.) The nucleus:

The membrane of the nucleus is the:

Choose the incorrect statement about the nucleus.

What is the consequence of a dysfunctional nuclear lamina? (Choose all correct.)

Choose the incorrect statement about the nuclear pores.

How much DNA is in the human nucleus?

DNA is packed in the nucleus so that it is inaccessible until replication.

The DNA double helix is about ❌nm in diameter. Bundled into ❌ or "beads" using ❌ histone proteins, it is about ❌nm in diameter. Further interaction with ❌ histone proteins ❌ this into a ❌nm fibre. During replication this can be ❌ to form a ❌nm diameter ❌.

Which kind of chromatin is the denser, inactive form?

The ratio of heterochromatin and euchromatin stays static during a cell's lifetime.

The location of chromosomes in the nucleus is not random.

(Choose all correct.)
The nucleus: