DNA and DNA replication | Baamboozle - Baamboozle

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A quiz for testing the basics of DNA structure, function and the replication process.

Study Slideshow

List the four essential enzymes for DNA replication:

DNA polymerase, Helicase, Ligase, Primase.

20

Apart from enzymes, list two essential ingrediants for DNA replication:

Free nucleotides, Template strand.

15

DNA repliciation is described as being semi-conservative, explain what this means?

Each new strand produced contain an original template strand and a newly built strand.

15

When does DNA replication occur?

Before mitosis / Interphase - S-phase

10

Why does DNA replication occur?

A second copy of DNA is required for producing the daughter cell in mitosis.

15

All living things contain DNA, true or false?

True!

10

Explain why DNA strands have a 5' end and a 3' end

Each carbon is numbered on a nucleotide. The last carbon on the strand is5th = 5', 3rd = 3'.

20

The DNA backbone has weaker bonds than the middle of the strand?

False!

10

Which direction does DNA polymerase add nucleotides?

5' to 3' direction.

15

What do the single stranded binding proteins (SSBP) do?

Hold template strands in place, prevents DNA strands fronm joining together.

15

Explain the difference between leading and lagging strand?

Leading strand is made faster (template strand: 3'-5'). Lagging strand is made more slowly and in chunks (template strand: 5'-3').

15

What are Okazaki fragments?

Short DNA chunks of the lagging strand.

10

The lagging strand requires multiple primers to build, true or false?

True!

10

Assuming 10% of a DNA sample is G, How much is in total is A and T?

80% (40%A + 40%T = 80% A&T)

10