Chromosome structure

Question 1

Chromosomes are made of

Answer 1

Chromosomes are made of one very long, condensed DNA molecule associated with proteins (in eukaryotic cells)

Question 2

The main proteins present are the large positively charged globular proteins called

Answer 2

histones

Question 3

histones role

Answer 3

their role is to organise and condense the DNA tightly so that it fits into the nucleus

Question 4

What is chromatin

Answer 4

The tightly coiled combination of DNA and proteins is called chromatin – this is what chromatids, and therefore chromosomes, are made of

Question 5

a gene is

Answer 5

is a base sequence of DNA that codes for: the amino acid sequence of a polypeptide. a functional RNA (including ribosomal RNA and tRNAs).

Question 6

Each chromatid is made up of one very long, condensed DNA molecule, which is made up of a series of

Answer 6

genes

Question 7

The ends of the chromatids in chromosomes are ‘sealed’ with protective structures called

Answer 7

telomeres