Name Class Date

Chapter Review

Use the clues and words to help you write the vocabulary terms from the chapter in the blanks. You may use a word once or not at all.

1. tip of a chromosome ______

2. enzyme that joins nucleotides to make a new strand of DNA ______

3. virus that infects bacteria ______

4. process of making a copy of DNA ______

Answer the following questions. Use the diagram to answer Questions 5 and 6.

5. What is the structure shown above?

A. replication fork C. enzyme

B. nucleotide D. hydrogen bond

6. What is the molecule labeled A?

A. sugar C. nitrogen base

B. phosphate group D. deoxyribose

7. Use the terms below to draw a linear graphic organizer in the space below.

Practice what you have learned by answering the following questions. Remember, you need to find the answer that is not true. Circle that answer.

1. Which scientist did not help determine the structure of DNA?

A. James Watson

B. Frederick Griffith

C. Francis Crick

D. Rosalind Franklin

2. Which of the following is not a job of DNA?

A. storing genetic information

B. copying genetic information

C. transmitting genetic information

D. mutating genetic information

3. Which is not true of a DNA molecule?

A. The backbone is made of sugars and phosphates.

B. The molecule is made of two strands.

C. Sugars are paired in the center of the molecule.

D. The molecule is shaped like a double helix.

4. Which statement is not true about DNA replication?

A. Prokaryotes replicate their DNA.

B. Eukaryotes replicate their DNA.

C. Cytosine is an enzyme that helps in replication.

D. DNA replication occurs before a cell divides.

5. Which statement is not true of bacteriophages?

A. They inject proteins into cells.

B. They are viruses.

C. They infect bacteria.

D. They inject their DNA into cells.

6. What statement does not describe DNA in a eukaryotic cell?

A. DNA is contained in chromosomes.

B. Enzymes are needed to replicate DNA.

C. DNA must be unzipped before replication starts.

D. DNA is not enclosed in a nucleus.

7. Which strands of bases are not correctly paired?

A. TATCCC

ATAGGG

B. CCGATT

GGCTAA

C. CATTAG

TCAATA

D. ACTCCC

TGAGGG

8. Which is not part of a DNA nucleotide?

A. phosphate group

B. sugar

C. protein

D. nitrogen base