DNA and RNA

Question 1

what is a nucleotide

Answer 1

a molcule containing a phosphate group, attached to a pentose sugar and a base

• its the monomer of nucleic acids
• nitrogen containing organic substances that form the bases of the nucleic acids in DNA and RNA

Question 2

what is DNA

Answer 2

deoxyribose nucleic acid

• code for life in eurkaryotes (all functions in a living organism)
• a double helix made of two antiparallel strands of nucleotides liked by hydrogen bonding between completmentary base pairs

Question 3

pentose sugar in RNA and DNA

Answer 3

RNA- ribose sugar

DNA- deoxy ribose sugar

Question 4

what are the purines

Answer 4

adenine and guanine

Question 5

pyramidine

Answer 5

thymine and cytosine

Question 6

bases in RNA

Answer 6

Adenine-Uracil

Guanine-Cytosine

Question 7

what did watson crick and franklin do

Answer 7

WATSON AND CRICK= discovered the structure and existence of DNA and its double helix

Rosland Franklin= helped through using DNA crystallography

Question 8

difference between DNA and RNA

Answer 8

DNA

1. double helix (stranded)
2. is a deoxyribose sugar
3. thymine as a base
4. found in nucleus primality
5. just one type

RNA

1. single stranded
2. ribose sugar
3. uracil as base
4. in and outside of nucleus
5. three types (tRNA, mRNA and rRNA)

Question 9

bond that links nucleotides together

Answer 9

phosphodiester bond

Question 10

bond that links base pairs together

Answer 10

hydrogen bond

Question 11

direction of a strand

Answer 11

5’-3’ or 3’-5’

Question 12

DNA’s strands are…

Answer 12

antiparallel

Question 13

what DNA strands twist to form

Answer 13

a double helix

Question 14

major groove

Answer 14

ON TOP in twist

Question 15

MINO GROOVE

Answer 15

on bottom in twist

Question 16

why are DNA’s strands antiparallel

Answer 16

dna is double stranded, but the strands like i opposite directions

• refers to orientation of carbons on pentose sugar
• one strands goes in a 5–3- and the other in a 3-5 direction