Mol Bio SGL1 Flashcards
1
Q
The component parts of dna
A
Nitrogenous base, 5-carbon sugar, phosphate group hpo4-2
2
Q
Adenine and guanine
A
Are related to the parent molecule purine
3
Q
Cytosine and thymine and uracil
A
Related chemically to pyramidine
4
Q
Nucleotide
A
Are composed of a nitrogenous base , a 5-carbon sugar(ribose or deoxyribose), and atleast one phosphate group
5
Q
Nucleosides
A
Are nucleotides without the phosphor group
6
Q
DNA size is expressed in
A
- Number of base pairs
- molecular weight (base on the assumption that the average weight of bp is 650 daltons
- using electron microscopy or gel electrophoresis
7
Q
RNA functions
A
Storage /transfer of genetic information
a) storage (genome) retroviruses
b) transfer of genetic information e.g. mRNA = “coding RNA” Encode protein
- structural : rRNA, major structural component of ribosome
- catalytic : RNA in ribosome has peptidyltranseferase activity
- reregulatory
