DNA

Question 1

What does Dna do

Answer 1

Contains genetic info and determines the structure and function of the cell. Found in nucleus but also mitochondria

Question 2

What is DNA wrapped around

Answer 2

A group of 8 specialised proteins called histones loosely to form nucleosome

Question 3

Chromatin

Answer 3

chromatin fiber around proteins in a condensed structure. (when not dividing), a tangled network of dna

Question 4

Gene

Answer 4

Is the short section of Dna which codes for specific protein

Question 5

Nucleotides contain

Answer 5

sugar called deoxyribose, phosphate group, organic base

Question 6

2 types of nucleotide

Answer 6

Rna ribose: ribose sugar with 5 carbon. Dna deoxyribose; same no o2

Question 7

A and T

Answer 7

2 bonds

Question 8

CG

Answer 8

3 bonds

Question 9

Purines

Answer 9

A and G

Question 10

Pyrimidines

Answer 10

T and C

Question 11

Bond between sugar and phosphate

Answer 11

Phosphodiester linkage, catalysed by polymerase enzyme. Water formed.

Question 12

nucleotide bonds

Answer 12

Bonds between 3’ carbon of sugar and o2 atom of the phosphate attached to 5’ sugar