nucleic acids

Question 1

what are the four bases in DNA called?

Answer 1

adenine, guanine, cytosine, thymine

Question 2

what are the complimentary base pairings?

Answer 2

guanine and cytosine
adenine and thymine

Question 3

what reactions occur between nucleotide molecules?

Answer 3

condensation

Question 4

a DNA nucleotide

Answer 4

phosphate group, organic base and deoxyribose

Question 5

compare and contrast DNA and RNA

Answer 5

DNA has deoxyribose whereas RNA has ribose, DNA is double stranded whereas RNA is single stranded, RNA as uracil instead of thymine. both polymers of nucleotides and both have phosphodiester bonds

Question 6

how is the structure of DNA adapted for the storage of genetic information?

Answer 6

helix is compact so lots can be stored in the nucleus.
the sugar phosphate backbone protects the organic bases inside.
the sequence of the bases is the genetic code

Question 7

how is the structure of DNA adapted for accurate replication?

Answer 7

2 strands so they can act as a template.
hydrogen bonds between bases that are easily Brocken so the strands can separate
complimentary base pairings allows accurate replication

Question 8

the process of DNA replication

Answer 8

DNA helicase breaks down hydrogen bonds between strands/ base pairs. Both strands act as a template. free nucleotides attach. Complimaenary base pairings. DNA polymerase causes condensation reactions which join adjacent nucleotides. PHosphodeiester bonds form. This is semi conservative replication

Question 9

why is the process known as semi conservative replication?

Answer 9

contains one parent strand which acts as a template