DNA Labeling
Name: ________________________________ Date: _________ Period: ___
Instructions: Use the cut outs on the following page to complete the complimentary
sequence of the DNA strand. Be sure to color each part of the nucleotide using the key.
Then answer questions 1-8.
A
T
C
Key
Adenine = Pink
Thymine = Blue
Guanine = Green
Cytosine = Red
Deoxyribose = Orange
Phosphate group = Yellow
Color and label the nucleotide.
T
C
A
G
A
T
G
1. There is 30% adenine in this DNA
strand. Find the percent for each base
pair.
A:_______% T:_______%
G:_______ % C: _______%
2. What is the complimentary sequence
of the following strand?
AGCTACGATAGCGCTCT
_____________________________
3. What is the monomer of DNA
called?
_____________________________
4. If a strand of DNA has 48% cytosine, what will the percent be for the other
nitrogenous bases?
C:________% A: ________% T: ________% G: ________%
5. If a strand of DNA has 22% thymine, what will the percent be for the other
nitrogenous bases?
C:________% A: ________% T: ________% G: ________%
6. Write the complimentary base pairs for the following DNA strand
Original:
A
G
G
C
T
G
A
G
A
T
Complementary:
7. What makes up the “backbone” of DNA? What color represents the backbone?
_________________________________________________________________
8. What do the dashed lines between the nitrogenous bases represent?
_________________________________________________________________
T
A
G
C
T
A
G
C
T
A
G
C
T
A
G
C
T
A
G
C