Chromosomes, genes and disease Flashcards
1
Q
DNA is packaged via which protein tetramer?
A
Histone (H3, H4, H2A, H2B)
2
Q
What are the purines?
A
Adenine and guanine
3
Q
How many hydrogen bonds between A and T?
A
Two
4
Q
How do the bases pair?
A
A with T and C with G
5
Q
What are the pyrimidines?
A
Cytosine, uracil and thymine
6
Q
Which type of base has a single ring structure? Purines or pyrimidines?
A
Pyrimidines
7
Q
What direction is DNA’s polarity?
A
5’ - 3’ polarity
8
Q
What is RNA’s secondary structure?
A
Stem loops
9
Q
A nucleoside is the base, sugar and phosphate. True or false?
A
False. It is only the base and sugar.
10
Q
Which type of DNA is loosely wound DNA, transcribed, not visible under microscopy and is like bead on a string?
A
Euchromatin
