BIOC0007 LECTURE 1 EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS VERIFIED
Nucleotide
phosphate group, sugar, nitrogen base
pentose
deoxyribose or ribose
2' hydroxyl group
What's the difference between the ribose and deoxyribose?
purine
a nitrogen base with a double ring structure
pyrimidine
a nitrogenous base that has a single-ring structure
adenine, guanine
Name purines
cytosine, thymine, uracil
Name pyrimidines
bases
purines and pyrimidines are weak ___
insoluble
purines and pyrimidines are relatively ___ in water at physiological pH
Guardians Angels are pure and two winged
, Guanine and Adenine are purines and two ringed (saying)
nucleoside
base + sugar
glycosidic bond
in an nucleoside, the sugar is linked to the base by ___
backbone
___ of the DNA is composed of repeating pentose-phosphate units
5' to 3'
DNA synthesis always proceeds in ____ direction
hydrogen, Van der Waals
DNA strands associate via non-covalent ___ and ___ bonds to form double helix
2
Adenine pair with thymine with __ H-bonds
3
Cytosine pairs with Guanine with ___ H-bonds
Chargaff's Rule
[A]=[T]and [C]=[G]
B-form
- the most energetically favourable formation of dis DNA
- most abundant (90%)
- right-handed double helix
- turn every 10.5 bp
- major groove wide and deep
WITH COMPLETE SOLUTIONS VERIFIED
Nucleotide
phosphate group, sugar, nitrogen base
pentose
deoxyribose or ribose
2' hydroxyl group
What's the difference between the ribose and deoxyribose?
purine
a nitrogen base with a double ring structure
pyrimidine
a nitrogenous base that has a single-ring structure
adenine, guanine
Name purines
cytosine, thymine, uracil
Name pyrimidines
bases
purines and pyrimidines are weak ___
insoluble
purines and pyrimidines are relatively ___ in water at physiological pH
Guardians Angels are pure and two winged
, Guanine and Adenine are purines and two ringed (saying)
nucleoside
base + sugar
glycosidic bond
in an nucleoside, the sugar is linked to the base by ___
backbone
___ of the DNA is composed of repeating pentose-phosphate units
5' to 3'
DNA synthesis always proceeds in ____ direction
hydrogen, Van der Waals
DNA strands associate via non-covalent ___ and ___ bonds to form double helix
2
Adenine pair with thymine with __ H-bonds
3
Cytosine pairs with Guanine with ___ H-bonds
Chargaff's Rule
[A]=[T]and [C]=[G]
B-form
- the most energetically favourable formation of dis DNA
- most abundant (90%)
- right-handed double helix
- turn every 10.5 bp
- major groove wide and deep
