Genetics Flashcards
1
Q
The phosphate group on DNA is bonded to which carbon atom?
A
The 5’ (5 prime) carbon
2
Q
To which carbon atom is the hydroxyl bonded to in DNA?
A
The 3’ (3 prime) carbon
3
Q
To which carbon atom in DNA is the nitrogenous base bonded to?
A
The 1’ (1 prime) carbon
4
Q
What is the difference in the hydrogen bonding of the nitrogenous bases in DNA
A
Cytosine and guanine (CG) form 3 hydrogen bonds, and adenine and thymine (AT) form only 2 hydrogen bonds.
5
Q
Mnemonic for pyrimidines and purines of DNA
A
CUT Pye: Cytosine, Uracil, and Thymine are PYramidines. Pure As Gold: Purines are Adenine & Guanine
6
Q
What are the two types of chromosomes, and how many are there of each in humans?
A
In humans, the first 22 pairs of chromosomes are autosomes, and the 23rd pair are sex chromosomes.
