11.3 TeXt B

The diagram represents a portion of one strand of a DNA molecule. Which of the four DNA strands match the strand in the diagram by base pairing?

• GGTGACT
• CCATATG
• GGTCGAT
• CCTAGTG

Which of these events occurs during DNA replication?

• DNA polymerase synthesizes a complementary strand from one, but not both, of the original strands.
• DNA polymerase synthesizes a complementary strand from each of the original strands.
• DNA ligase breaks apart one of the original strands, and other enzymes re-assemble the components into a new strand.
• DNA ligase breaks apart both of the original strands, and other enzymes re-assemble the components into two new strands.

What is needed for DNA replication? Select all that apply.

• enzymes to break the hydrogen bonds of the DNA molecule
• free nucleotides
• free amino acids
• polymerase to join nucleotides onto the template DNA strand
• genetic information that helps speed up the process

Which is one way that DNA replication is similar in eukaryotic cells and prokaryotic cells?

• number of replication forks
• use of the enzyme DNA polymerase
• occurs in the cell nucleus
• occurs in the cytoplasm

The principal enzyme involved in DNA replication is called ______________.

• complementary
• DNA polymerase
• nucleotides
• semiconservative

The enzyme joins ________________ to synthesize a new complementary strand of DNA.

• complementary
• DNA polymerase
• nucleotides
• semiconservative

The enzyme joins nucleotides to synthesize a new _______________ strand of DNA.

• complementary
• DNA polymerase
• nucleotides
• semiconservative

DNA replication is called ______________ because each new DNA molecule is made up of one original and one new strand.

• complementary
• DNA polymerase
• nucleotides
• semiconservative

The diagram represents a model of DNA replication. What can you conclude about DNA replication from this diagram?

• Both original strands are replicated in the same direction.
• The two original strands are replicated in opposite directions.
• Only one complementary strand is replicated.
• Each original strand is “unzipped” and nucleotides are reused.

1. What are telomeres?

• Enzymes that repair DNA
• The tips of eukaryotic chromosomes
• Proteins that regulate cell division
• Structures that hold chromosomes together