4-L2

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What is the main function of chromatin?

Package DNA into a small volume (correct)

Store genetic information

Help with cell division

Facilitate DNA replication

What is a nucleosome?

DNA segment without histones

A type of protein involved in gene expression

A bead-like structure consisting of DNA coiled around histone proteins (correct)

A type of nucleotide

Where is eukaryotic DNA located?

Cytoplasm

Mitochondria

Ribosomes

Nucleus (correct)

What is the role of histones in DNA organization?

Package DNA into compact structures Signup and view all the answers

How is eukaryotic DNA compacted into chromosomes?

By forming nucleosomes with histones Signup and view all the answers

What did Watson and Crick suggest about DNA replication?

Each strand acts as a template for a newly synthesized strand Signup and view all the answers

Why is chromatin important for mitosis and meiosis?

To prevent chromosome breakage Signup and view all the answers

What does a nucleosome consist of?

A combination of histone proteins and coiled DNA Signup and view all the answers

What are the main components of chromatin?

DNA and proteins Signup and view all the answers

What is the repeating structural unit within eukaryotic chromatin?

Nucleosome Signup and view all the answers

What is the main structural component of chromatin?

Double-stranded DNA wrapped around histone proteins Signup and view all the answers

How many base pairs of DNA wrap around a single nucleosome core?

160 bp Signup and view all the answers

What is the function of histone proteins in chromatin?

Pack long DNA molecules Signup and view all the answers

When does DNA replication occur in eukaryotic cells?

During S phase Signup and view all the answers

What is the significance of a replication fork during DNA replication?

It separates the two DNA strands Signup and view all the answers

What is the purpose of replication bubbles during DNA replication?

To prevent DNA from being attacked by enzymes Signup and view all the answers

Which phase of the cell cycle is incorrectly assumed to be a resting phase?

Interphase Signup and view all the answers

What is the main function of the G1 checkpoint in the cell cycle?

To check for DNA damage and growth signals Signup and view all the answers

Which type of cells in multicellular organisms undergo regular cell division?

Somatic cells Signup and view all the answers

How many pairs of chromosomes do humans have?

22 pairs of autosomes and 1 pair of sex chromosomes Signup and view all the answers