Storing and Using Genetic Info

Question 1

Each nucleotide of DNA contains

Answer 1

phosphate, sugar (2-deoxribose), nitrogen containing base

In RNA, sugar = ribose

Question 2

Purines

Answer 2

adenine (A) and guanine (G)

Question 3

Pyridimines

Answer 3

thymine (T) and cytosine (C),

Question 4

2 properties of DNA

Answer 4

semi-conservative (1 parental/1daughter) and bidirectional (new strands grow different direction 5 to 3)

Question 5

Different codons specify the same amino acid

Answer 5

Degeneracy/redundancy of genetic code

Question 6

coding regions

Answer 6

exons (transcription)

Question 7

non-coding regions

Answer 7

introns (transcription)

Question 8

Which chromatin has active genes?

Answer 8

euchromatin

Question 9

where does transcription occur?

Answer 9

nucleus
make mRNA (RNA polymerase)

Question 10

where does translation occur?

Answer 10

cytoplasm

info contained in mRNA used to make polypeptide

Question 11

Difference between normal Hb and sickle cell

Answer 11

mutation of single nucleotide
coding strand GAG to GTG
template strand GUG
GLU to VAL (6)

Question 12

continuous - DNA polymerase
coding strand - 3’ to 5’
template strand - 5’ to 3’

Answer 12

Lagging strand

Question 13

One gene can code more than 1 protein

Answer 13

alternative splicing