DNA/RNA/ Protein Synthesis

2. The structure of DNA is described as:

• a double helix

• a single strand

• a triple helix

• a quadruple strand

3. What are Chargaff’s base pairing rules?

• A pairs with T, and C pairs with G

• A pairs with C, and G pairs with T

• A pairs with G, and C pairs with T

• A pairs with A, and C pairs with C

How many H-bonds can cytosine and guanine make?

How many H-bonds can adenine make with thymine?

7. When and where does DNA replication occur?

• During the S phase of the cell cycle in the nucleus

• During the G1 phase of the cell cycle in the cytoplasm

• During mitosis in the mitochondria

• During cytokinesis in the ribosome

Put the following DNA Replication steps in order:

• Stabilizing proteins hold open the DNA strand.

• DNA polymerase moves along the individual DNA strands and adds a complementary nucleotide to each strand thereby making an identical copy.

• Primase adds RNA primers to both DNA strands

• Ligase glues DNA fragments together.

• DNA helicase unzips the original DNA strand 2. Stabilizing proteins hold open the DNA strand.

DNA replication happens in what direction?

• 5’ to 3’

• 3’ to 5’

What is the product of DNA replication?

• Two identical DNA molecules

• One RNA molecule

• Two different DNA molecules

• One protein molecule

With respect to DNA replication, the term semi-conservative means:

• each of the two daughter DNA molecules will have one old strand and one newly synthesized strand.

• both strands of the daughter DNA molecules are newly synthesized.

• one of the daughter DNA molecules is entirely old DNA, and the other is entirely new DNA.

• the original DNA molecule is conserved, and a completely new DNA molecule is synthesized.

The new DNA strand is identical / different than the original strand. (Circle one)

• identical

• different