Chromosome and DNA

Question 1

Word chromosome means

Answer 1

Chromo=coloured + soma=body

• coloured body

Question 2

What is chromosome

Answer 2

Chromosomes are thread like structure present in cell nucleus in condensed form of chromatin network

Chromosome are only present during cell division

Question 3

What should Be Chromosome called because of its transparent colour.

Answer 3

Misnomer

Means colourless

Question 4

chromosome structure

Answer 4

• Centromere- a round strucutre
• centromere is consist of kinetochore
• there are chromatids attached to centromere
• there are 2 arms at each chromatids

Question 5

types of chromosome on the basis of centromere

Answer 5

1. Metacentric=when all chromatid arms are equal
2. Sub-metacentric=when one arms are equal and other one little short
3. Acrocentric= just little chromatid at one side and full at other
4. Telocentric= no chromatid on one side

Question 6

Why there are 4 types of chromsome on th basis of centromere

Answer 6

because centromere do change its position and due to this chromatids remain unequal.

Question 7

What is primary constrictin

Answer 7

Centromere is primary constrictin. Cause here compression occures.

Question 8

Composition of DNA

Answer 8

DNA is made up of nucleotides Chains.

Question 9

What are nucleotides

Answer 9

Nucleotides are combination of nitrogenious base and phosphate group to Deoxyribose Sugar

* Deoxy ribose is pentose sugar

Nitrogenous base is attached to C1 while Phosphate to C2

Question 10

How are two nucleotides connected to eachother?

Answer 10

Nucleotides are connected to eachother through phospho-di-ester bond. C5 attach phospahte create ester bond and other nucleotide make bond to phospate of C5 and di ester is created