The structure of DNA

Question 1

what are DNA nucleotides composed of

Answer 1

Deoxyribose sugar, a base and a phosphate

Question 2

Toy of bond on the backbone of the DNA molecule

Answer 2

Sugar-phosphate

Question 3

Base pairing rule

Answer 3

Adenine and thymine

Guanine and cytosine

Question 4

What does the base sequence of DNA form

Answer 4

The genetic code

Question 5

What is the bond that holds complementary bases together

Answer 5

Hydrogen

Question 6

Structure of DNA

Answer 6

Antiparallel structure, double helix

Question 7

What does antiparallel mean

Answer 7

Strands run in opposite directions dri, 3’ to 5’ respectively

Question 8

What is on the 5’ end

Answer 8

Phosphate

Question 9

What is on the 3’end

Answer 9

Deoxyribose

Question 10

Organisation of DNA in prokaryotes

Answer 10

Circular plsasmid and a circular chromosome

Question 11

Organisation of DNA in eukaryotes

Answer 11

Linear chromosomes in nucleus

Membrane bound organelles eg chloroplasts and mitochondria which contain circular chromosomes

Question 12

What is the name of the proteins that are packaged with tightly coiled DNA

Answer 12

Histone

Question 13

Why is Yeast a special example of eukaryote

Answer 13

Contains plasmids