Advertisement Upgrade to remove ads

9th Grade Biology Chapter 12 DNA Quiz


deoxyribonucleic acid

Frederick Griffith's major contribution

transformative factor in bacteria; some chemical compound in cells must be responsible for BACTERIAL TRANSFORMATION

Oswald Avery/Hersey & Chase's major contribution

DNA is transformative factor

Rosalind Franklin's major contribution

x-ray picture of DNA

James Watson & Francis Crick's major contribution

double helix


monomer of DNA

Three subunits that make up a neucleotide

phosphate, deoxyribose, nitrogen base

Sugar & Phosphate

make up the SIDES of the ladder


makes up th rungs of the ladder

Chargaff's base paring rule

A = T
C = G
Explained by the double helix model


bond that connects nitrogen bases

What is replication

copying of DNA

When does replication occur

S phase of interphase

Steps of replication

1) Helicase unwinds and unzips
2) DNA polymerase adds new nucleotides
The ENZYMES are Helicase and Polymerase

Semi-Conservative Model

the correct replication model, 1/2 of old strands and 1/2 of new strands

Three types of Replication Models

Conservative (old strands stay together)
Dispersive (mix of old strands and new strands)
Semi-Conservative (1/2 old strands & 1/2 new strands)

Template strand DNA TTC GAG

Complementary strand DNA AAG CTC


process that can change a harmless bacterial strain into a disease-causing strain


virus that infects bacteria

Base Pairing

In DNA, the fit between thymine and adenine and the fit between cytosine and guanine (A=T, C=G)


process that copies a DNA molecule, DNA separates into two strands during this process

DNA Polymerase

Main enzyme in DNA replication that joins individual nucleotides to produce a new strand of DNA, proofreads each new DNA strand to make sure that each molecule is a copy of the original


tip of a chromosome

The center of the DNA strand exhibits

Base Pairing

What did Hershey & Chase study?

they studied a bacteriophage that was composed of a DNA core and a protein coat

This can begin at many places on the DNA molecule


Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording