Key words for DNA

Question 1

DNA

Answer 1

deoxyribose nucleic acid

Question 2

What is a chromosome?

3 points

Answer 2

1) A structure found inside the nucleus of a cell
2) made up of homolugus pairs - one from each parent
3) 23 pairs in the human body (46 all together)

Question 3

What is a gene?

3 points

Answer 3

1) Section of DNA
2) Codes for a particular characteristic
3) Come in different forms these are called allele

Question 4

What is an allele?

Answer 4

One or two versions of a gene

Question 5

What is purine and pyrimidines?

Answer 5

The nitrogen bases that hold the strands of DNA together through hydrogen bonds
adenine and thymine = purine
guanine and cytosine= pyrimidines

Question 6

What are pentose and hexo sugars?

Answer 6

pentose sugars have 5 carbons = lost an oxygen on second carbon; make up DNA
hexo sugars = make up RNA

Question 7

What does 5’ and 3’ stand for on a double helix?

Answer 7

5’= 5 prime end - phosphate attached to 5th carbon
3’= phosphate attached to 3rd carbon. O2 pointing downwards
the structure is joined together in an anti parallel structure