DNA Base Pairing Assessment
1. The monomer unit of DNA is:
a. Nucleotide
b. Amino acid
c. Fatty acid
d. Polypeptide
2. What are the three parts of every nucleotide?
a. Phosphate group, sugar, amino acid
b. Phosphate group, sugar, nitrogenous base
c. Nitrogenous base, amino acid, sugar
d. Nitrogenous base, two sugars
3. What are the base pair rules for adenine, guanine, cytosine, and thymine?
____________________________________________
4. The nucleotides adenine and guanine are also known as __________________ because
they have a double ring chemical structure.
5. What type of bond holds nucleotides together in DNA?
a. Ionic bond
b. Covalent bond
c. Polar covalent bond
d. Hydrogen bond
6. Write the replicated DNA sequence using the base pair rule.
TAT G C T G T AA C T TA G
________________________
7. What process happens during the synthesis phase of the cell cycle?
a. Replicated chromosomes line up at the equator of the cell.
b. DNA replication occurs.
c. The cell carries out its physiological function.
d. The nuclear envelope disintegrates.
8. What is the name of the enzyme responsible for “unzipping” the DNA double helix?
a. DNA polymerase
b. Ligase
c. Helicase
d. Okazaki fragment
9. The backbone of DNA is made up of which two parts of the nucleotide?
a. The sugar and nitrogenous base
b. The phosphate and nitrogenous base
c. The sugar and phosphate group
d. The sugar and amino acid
10. What is the name of the strand of DNA being replicated in the direction of the helicase
enzyme?
a. Lagging strand
b. Parent strand
c. Okazaki fragment
d. Leading strand
CHALLENGE:
1. Why do we call DNA replication a semiconservative process?