4.3 DNA and Inheritance Flashcards
1
Q
what repeating units make up a dna molecule
A
phosphate group
sugar and a base
2 sugar phosphate backbones
two chains join together
twist to form a double helix
2
Q
how are units of dna connected
A
chemical bond forms between the sugar of a unit and the phosphate of the next
3
Q
4 types of bases
A
Adenine
Thymine
Guanine
Cytosine
4
Q
triplet code
A
each triplet codes for a particular amino acid
5
Q
gene
A
controls the development of one characteristic
