U4C1: DNA Structure & Replication

DNA Structure & Replication

Unit 4: Genetics

Concept 1

As we go through this lecture, add notes to your DNA model!

You can use this on your test, so add what you think will be useful!

Multiple Choice

Why is DNA important?

• it is very small and very complicated

• it's in everything

• it serves as the blueprint for traits of all living things

• because we eat it every day for energy

Draw a picture of a nucleotide on your DNA model

• Sugar

• Phosphate group

• Nitrogen base

Label the at least one of each nucleotide on your DNA model

A = Adenine

T = Thymine

G = Guanine

C = Cytosine

Multiple Choice

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

Multiple Choice

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Multiple Choice

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

Multiple Choice

A monomer of DNA is called a(n)

• Monosaccharide
• Amino Acid
• Triglyceride
• Nucleotide

Draw and fill in the Venn Diagram based on what we have discussed

Pick out 2 colors to draw a picture with

• 1st color = old strand

• 2nd color = new strand

• Follow along with video to draw your own picture!

Multiple Choice

The process of DNA replication is called semi conservative because it results in

• none of these

• Two DNA molecules. One original molecule and one with two new strands

• two exact copies with new strands

• two identical molecules, each with 1 original strand and one new.

Multiple Choice

In what phase of the cell cycle does DNA replication take place?

• G1
• S
• G2
• M

Multiple Choice

order of replication

• 3, 4, 2, 1

• 3, 1, 4, 2

• 2, 1, 4, 3

• 3, 4, 1, 2

Multiple Choice

DNA replication results in two DNA molecules,

• each one with two original strands
• each one with two new strands
• each one with one new strand and one original strand
• one with two new strands and the other with two original strands

Multiple Choice

Okazaki fragments are found on the _______________ strand

• Leading

• Lagging

Multiple Choice

Which enzyme seals okazaki fragments together on the lagging strand?

• Topoisomerase

• Helicase

• Polymerase

• Ligase

Multiple Choice

If a strand reads:
3' A A A T T T C 5'
The matching strand would read...

• 5' T T T A A A G 3'
• 3' T T T A A A G 5'
• 5' A A A T T T C 3'
• 3' U U U A A A G 5'

Multiple Choice

DNA polymerase is a(n)

• lipid

• enzyme

• sugar

• starch