Structure If Dna Flashcards
1
Q
What is DNA
A
DNA is a double stranded helix made up of repeating units called nucleotides
2
Q
What is each nucleotide composed of
A
A phosphate, deoxyribose sugar and a base.
3
Q
What are the four bases in DNA
A
Adenine, thymine, cytosine, guanine
4
Q
What is the backbone of each DNA strand produced by
A
By strong sugar-phosphate bonds
5
Q
How are bases paired
A
By hydrogen bonds between the two DNA strands
6
Q
What can DNA be described as being
A
A double stranded anti-parallel structure, with deoxyribose and phosphate at 3’ and 5’ ends of each strand respectively, forming a double helix.
7
Q
What does the base sequence of DNA form
A
Forms the genetic code
