Download Worksheet on DNA and RNA

Name _____________________________
DNA/RNA Study Guide
Period ______________________________
Use your notes (all found on the website) to answer the following questions:
1.
DNA is composed of smaller subunits know as ________________________.
2.
The three parts of a nucleotide are _____________________, ________________________, and
________________________.
3.
DNA looks like a ladder twisted into a shape known as a _____________________________.
4.
The two molecules that make up the sides of the ladder or the side portion of a DNA molecule are
__________________ and ___________________.
5.
The molecules that meet across the middle, forming the steps of the “ladder’” are known as
___________________________.
6.
The four nitrogen bases that are found in DNA are ___________________, __________________,
____________________ and ____________________.
7.
Which nitrogen bases always pair with one another?
8. The process in which DNA builds an exact duplicate of itself is known as _______________________.
9. RNA does not have _____________________ nitrogen base. It is replaced with ____________________.
10. RNA is a ___________________ stranded molecule.
11. The three types of RNA are ___________________________, ___________________________, and
___________________________.
12. The process by which a strand of RNA molecule is made is called ____________________________.
13. What is the primary function of DNA?
14. Label the parts of the drawing below. Include all of these terms: nucleotide, phosphate, sugar, nitrogen
base.
15. Complete the DNA molecule shown below
A
T
A
G
C
T
16. Why is it necessary for DNA to replicate?
a. So that twins are born
b. Scientists still have not figured out the answer to that question
c. So that both daughter cells have a copy of the DNA
d. All of the above
17. The structure of DNA is described as a
a. Double stranded helix
b. Triple stranded helix
c. Linear strand
d. None of the above
.
18. Which 2 scientists correctly determined the structure of DNA?
a. Aristotle and Galileo
b. Watson and Crick
c. Avery and Franklin
d. None of the above
19. What are the sides of the DNA ladder made of?
a. Nitrogenous bases
b. Phosphates and sugars
c. Nitrogenous bases and sugars
d. Phosphates and nitrogenous bases
20. What is a gene?
a. A sequence of DNA that codes for amino acids and determines a trait
b. a protein
c. an enzyme that help in replication
d. a chemical that starts cell division
21. DNA is made up of many
a. Nuclei
b. Nucleotides
c. Cells
d. None of the above
.
22. The process of copying DNA is called
a. Translation
b. Transcription
c. Replication
d. None of the above
23. DNA is found in the
a. Mitochondria
b. Cytoplasm
c. Nucleus
d. None of the above
.
of eukaryotic cells.
Define the following terms (USE YOUR NOTES – NO CREDIT FOR ANY OTHER ANSWER):
1. Ribosome:
2. Protein:
3. DNA Replication:
4. Transcription:
5. Codon:
6. Amino Acid:
7. Translation: