U3 AoS1

Question 1

KAU

identify the 2 types of nucleic acids

Answer 1

DNA (deoxyribonucleic acid) & RNA (ribonucleic acid)

Question 2

What is a nucleotide?

Answer 2

The monomer in nucleic acids. In DNA, a nucleotide consists of a negatively charged phosphate group and deoxyribose pentose sugar group as well as a nitrogenous pase (A,T,C &G) and in RNA a nucleotide consists of a negatively charged phosphate group and ribose pentose sugar group as well as a nitrogenous pase (A,U,C &G)

Question 3

what are the types of bases and how do they pair?

Answer 3

pyridimines- A,T,U
purines- C & G
Bases pair in a complementary manner via hydrogen bonds; pyrimidines will only pair with each other via two hydrogen bonds (in RNA U is the equivalent pairing to A of T in DNA)

Question 4

how is dna structured

Answer 4

backbone made of negatively charged phosphate groups and deoxyribose pentose sugar groups in nucleotides and nitogenous bases are perpindicular to the backbone