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Cell Biology Lecture Week 6

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Questions and Answers

Which structure completely disintegrates during the prophase of mitosis?

Nuclear pore complexes

Nuclear envelope (correct)

Nucleolus

Nuclear lamina

What proteins make up the nuclear pore complexes?

Histones

Lamins A, B, and C

Ribosomes

Nucleoporins (correct)

What happens to the lamina proteins in the nucleus during prophase of mitosis?

They multiply rapidly

They form a protective layer around the nucleus

They disintegrate due to phosphorylation (correct)

They move out of the nucleus through nuclear pore complexes

Which part of the cell is continuous with the outer membrane of the nuclear envelope?

Rough endoplasmic reticulum Signup and view all the answers

What is the name of the viscous liquid inside the nucleus?

Nucleoplasm Signup and view all the answers

How much DNA is present in each cell?

1 meter Signup and view all the answers

How many different types of histones are there?

5 Signup and view all the answers

What is the structure called that is made up of the DNA wrapped around the octomer of histones?

Nucleosome Signup and view all the answers

What is the structure called where the chromatin loops fold on themselves to form either euchromatin or heterochromatin?

Chromatin fiber Signup and view all the answers