Nucleotides

Question 1

composed of?

Answer 1

a pentose monisaccharide, a phosphate group, a nitrogenoud base

Question 2

how are nucelotides linked together?

Answer 2

through condensation reactionto form a poly nucleotide phosphate group at 5th carbon forms a covelent bond at third carbon of the adjacent nucleotide- phosphodiester

Question 3

what is the backbone

Answer 3

phosphate joined with carbon 3 of next nucleotide joined by phosphodiester bonds

Question 4

small dna bases called?

Answer 4

pyrimidines

Question 5

large dna bases?

Answer 5

purines

Question 6

four bases?dna?

Answer 6

t and d, c and g

Question 7

which bases are pyrimidines?

Answer 7

thymine and cytosine

Question 8

semi conservative replication of dna?

Answer 8

dna helicase causes two strands to split. free nucleotides that have activated are attracted to complementory bases. once together they are lined up, dna polymerade joins them. each new molecule is composed of one original strand and a newly formed one

Question 9

how rna is different to dna

Answer 9

rna has a u instead of a t, uracil replaces thymine