Genetics reading 1

Question 1

3 parts of a nucleotide

Answer 1

sugar, base, and phosphate

Question 2

how do the sugars of DNA and RNA differ?

Answer 2

DNA has a hydrogen and RNA has a hydroxyl group

Question 3

5 basic bases

Answer 3

adenine, cytosine, guanine, thymine, and uracil

Question 4

where is the phosphate located on the sugar

Answer 4

at 5 prime

Question 5

what bases pair in the DNA

Answer 5

A-T, G-C

Question 6

How do purines and pyrimidines bases differ?

Answer 6

purine has 2 carbons and pyrimidine has 1 carbons

Question 7

explain polynucleotide polarity

Answer 7

one end is positively charged while the other is negatively charged

Question 8

explain how DNA is antiparallel

Answer 8

strands run in opposite directions parallel to each other

Question 9

Why is C-G stronger than A-T?

Answer 9

It has 3 hydrogen bonds while A-T has 2

Question 10

diagram for information flow

Answer 10

(replication) DNA-> (transcription) RNA-> (translation) protein

Question 11

2 circumstances information flow does not fit in the central dogma

Answer 11

protein to protein
protein to nucleic acid

Question 12

chromatin

Answer 12

complex of DNA and proteins

Question 13

what amino acids give histone proteins their (+) charge and why is it important

Answer 13

lysines and arginines, they pack DNA into fibers

Question 14

structure of a nucleosome

Answer 14

DNA wrapped around a bundle of 8 proteins

Question 15

Role of histone protein

Answer 15

stabilizes nucleosomes