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Cell Division and Chromatin Fibres Quiz

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Questions and Answers

What is the function of a centromere?

To attach chromosomes with spindle fibres during cell division and to detach sister chromatids during anaphase.

What happens to chromatids after cell division is complete?

Chromatids decondense and revert to chromatin fibres.

What is a chromatid?

One vertical half of a duplicated chromosome.

What are sister chromatids?

Two identical chromatids joined by a centromere. Signup and view all the answers

What are genes?

Specific sequences of nucleotides on a chromosome that encode proteins. Signup and view all the answers

What biological evidence can be obtained from blood, semen stains, hair, or clothing found at a crime scene?

DNA fingerprinting Signup and view all the answers

What is the main function of chromatin fiber in a cell?

Made up of DNA and Histones Signup and view all the answers

What is the function of genes?

To encode proteins that determine specific features of an organism. Signup and view all the answers

What is the main purpose of cell division in organisms?

Growth, replacement, repair, and reproduction Signup and view all the answers

What happens to chromosomes during cell division for growth, replacement, and repair?

They duplicate and distribute equally Signup and view all the answers

Where are the two sister chromatids of a chromosome attached to each other?

Centromere Signup and view all the answers

Who first discovered the structure of DNA?

Rosalind Franklin Signup and view all the answers

What are the three components of a nucleotide?

Sugar, Phosphate, and Nitrogenous Bases Signup and view all the answers

What is the process through which repair of injuries is done in the body?

Cell division Signup and view all the answers

Which cells in the bone marrow divide to replace old cells?

Parent cells Signup and view all the answers

How are accidental injuries like cuts in the skin or fractures in the bone repaired?

Covering up gaps and joining broken ends Signup and view all the answers

Where does mitosis occur in the body?

In all body cells except oocytes and spermatocytes Signup and view all the answers