DNA Flashcards
1
Q
A DNA molecule is made of
A
- 2 long strands of alternating sugar and phosphate
- The strands are joined by the bases.
- There are 4 bases - A, T, C, G
- A pairs with T
- C pairs with G
- The entire molecule twists into a double helix.
2
Q
What are the 4 bases in a molecule called?
A
Adenine
Thymine
Cytosine
Guanine
3
Q
In a molecule what does Adenine pair with?
A
Thymine
4
Q
In a molecule what does Cytosine pair with?
A
Guanine.
5
Q
How does DNA work?
A
- The order of the bases forms a code for making proteins.
*Every 3 bases form a triplet code.
*Each triplet code forms 1 amino acid.
*This code therefore determines the order of amino acid in a protein.
*In the cytoplasm, proteins are built from amino acids.
6
Q
What does the triplet code in DNA determine?
A
The triplet code determines which protein is built by identifying and linking the amino acids.
7
Q
What bonds the molecule bases together?
A
Hydrogen bonds.
8
Q
Triplet code diagram
A
9
Q
Helical structure
A
10
Q
Phosphate group DNA structure
A
