DNA AND RNA NUCLEOTIDES AND DNA REPLICATION

Question 1

what are the complementary base pairs of DNA

Answer 1

A-T
and C-G

Question 2

How does DNA replicate

Answer 2

via semi - coservative Replication

Question 3

What type of bond forms between complementary base pairs and how many of them between A-T and C-G

Answer 3

hydrogen bonds and 2 between A-T and 3 between C-G

Question 4

what does a newly replicated DNA strand contain

Answer 4

one new and one original strand

Question 5

What are the complementary base pairs of RNA

Answer 5

A- U

and

C-G

Question 6

what protects the base pairs

Answer 6

sugar phosphate backbone

Question 7

Describe an RNA nucleotides structure

Answer 7

ribose sugar, phosphate group and one of 4 nitrogenous bases ( adenine, uracil, cytosine and guanine)

Question 8

what binds to the exposed bases on the template strands during DNA replication

Answer 8

free DNA nucleotides

Question 9

What is DNA polymerase’s jobs in DNA replication

Answer 9

to catalyse the formation of Phsophodiester bond between DNa nucleotides on the new strands

Question 10

What reaction joins DNa and RNA necleotides together and what bond is formed

Answer 10

condensation reaction and a phosphodiester bond

Question 11

what is DNA helicase’s job?

Answer 11

to break the hydrogen bonds between the complementary base pairs and exposes them breaking apart the double helix

Question 12

compare DNA and RNA structure

Answer 12

DNA is double stranded in a helix and long

RNA is single stranded, linear and much shorter

Question 13

what are the three types of RNA

Answer 13

mRNA and tRNA and rRNA

Question 14

what does a newly replicated DNA strand contain

Answer 14

one new and one original strand

Question 15

describe a DNA nucleotides structure

Answer 15

deoxyribose sugar, phosphate group and one of 4 nitrogenous base (a, T, C, G )