L2

Question 1

Describe the basic structure of a nucleotide unit, its chemical constituents and bondings involved.

Answer 1

1

Question 2

What are the four bases, their families and how many hydrogen bonds do they form with their complementary bases?

Answer 2

2

Question 3

Why is DNA an ideal genetic material?

Answer 3

Great storage of information with millions of bases

Degenerate - one amino acid is coded for by more than one codons

Great stability - double helix

Able to unwind and be transcribed - hydrogen bonds between polynucleotides may be lost

Mutation - have the ability to change over time and allow genetic variation

Question 4

State the five classes of histones and describe why they bind to DNA helix.

Answer 4

Positively charged histones are electrostatically attracted to negatively charged sugar-phosphate backbone

Question 5

What makes up a unit of nucleosome?

Answer 5

Question 6

I can’t think of more questions. Go to the last page of Matthew Cheung notes and cram all the data about dimensions of genes

Answer 6

Congrats this is the end lmao