Biology Ch 10.8 - 10.9

Which of the following about DNA replication is true?

• It includes the base pair uracil

• begins when two DNA molecules join together to exchange segments.

• occurs through the addition of nucleotides to the end of the parental DNA molecule.

• uses each strand of a DNA molecule as a template for the creation of a new strand.

Which of the following about DNA replication is true?

• It does not include the enzyme DNA polymerase

• results in the formation of four new DNA strands.

• occurs through the addition of nucleotides to the end of the parental DNA molecule.

• Utilizes thymine as a base

What is the complementary DNA strand of the following: CGGTAC

How much DNA is conserved (or comes from the parents) when the double-stranded molecule is being duplicated?

• 50%

• 25%

• 75%

• 0%

What is the function of multiple sites of replication when duplicating DNA?

• assure the correct orientation of the two strands in the newly growing double helix.

• create multiple copies of the DNA molecule at the same time.

• remove errors in DNA replication.

• shorten the time necessary for DNA replication.

Which of the following most accurately represents the copying mechanism of DNA?

• looking at your reflection in a pool of water.

• mixing flour, sugar, and water to make bread dough.

• taking a picture of yourself and of your reflection in a mirror.

• carving a figure out of wood.

Which enzyme catalyzes the elongation of a new DNA strand?

• RNA polymerase

• reverse transcriptase

• DNA ligase

• DNA polymerase

Why does a DNA strand grow only in the 5ʹ to 3ʹ direction?

• because the DNA molecule only unwinds in the 5ʹ to 3ʹ direction

• because DNA polymerases can only add nucleotides to the 3ʹ end of the growing molecule

• because DNA polymerases can only add nucleotides to the 5ʹ end of the growing molecule

• because DNA polymerase requires the addition of a starter nucleotide at the 5ʹ end

Which option best depicts the flow of information when a gene directs the synthesis of a cellular component?

• DNA → RNA → protein

• DNA → tRNA → mRNA → protein

• RNA → DNA → RNA → protein

• protein → RNA → DNA

The transfer of genetic information from DNA to RNA is called ____