WorksheetsUnit 5 Test Review - Scientists, DNA Structure, & DNA Rep.
Total questions: 22
Worksheet time: 11mins
Which scientist discovered DNA by studying white blood cells in pus soaked bandages?
Johannes Meischer
Rosalind Franklin
Watson & Crick
Erwin Chargaff
Which scientist developed the base pairing rules of DNA?
Johannes Meischer
Rosalind Franklin
Watson & Crick
Erwin Chargaff
Which scientist discovered the structure of DNA by studying X-ray images of DNA?
Johannes Meischer
Rosalind Franklin
Watson & Crick
Erwin Chargaff
Which scientists developed the first 3D model of DNA?
Johannes Meischer
Rosalind Franklin
Watson & Crick
Erwin Chargaff
Rosalind Franklin developed an image of DNA called photo 51. What was the importance of this image?
It shows that DNA is a double helix
It shows that DNA is a single helix
It shows that the bases face outward on the strand
It shows that DNA is held together by peptide bonds
What does DNA stand for?
Ribonucleic Acid
Deoxyribonucleic Acid
What are the monomers (building blocks) of DNA?
Nucleotides
Monosaccharides
Amino Acids
Fatty Acids
Label the parts of the nucleotide
A: Phosphate
B: Sugar
C: Base
A: Sugar
B: Phosphate
C: Base
A: Sugar
B: Base
C: Phosphate
A: Base
B: Sugar
C: Phosphate
The circled part of this image represents the
sugar phosphate backbone
base pairing
hydrogen bonding
peptide bonding
What type of bonds holds the DNA bases together?
Hydrogen
Peptide
Carbon
Ionic
Are hydrogen bonds between bases weak or strong and why?
Strong - to prevent mutations
Strong- to support the DNA strand
Weak - so new bases can be added to the DNA strand
Weak - so they can be separated for replication
What are Chargaff's base pairing rules in DNA?
A-T
C-G
A-G
C-T
A-C
T-G
A-U
C-G
What is the difference between a Purine and a Pyrimidine?
Purines have 2 rings
Pyrimidines have 1 ring
Purines have 1 ring
Pyrimidines have 2 rings
There is no difference
Which bases are purines?
C, T
A, G
A, C
T, G
What is the shape of DNA?
Double helix/
Antiparallel Strands/
Bases facing inward
Double helix/
Antiparallel strands/
Bases facing outward
Single Helix
What does antiparallel mean?
Strands pointing in opposite directions
Both strands pointing in the same direction
The strands cross over each other
Why is DNA antiparallel?
So the bases face each other
So the bases both face outward
So the bases both face left
So the bases both face right
In which phase of the cell cycle does DNA replicate?
Interphase
Prophase
Metaphase
Anaphase
What is the role of Helicase in DNA replication?
It breaks the Hydrogen bonds between bases
It adds new bases to the DNA strand
It seals the new DNA strand once it is made
What is the role of DNA polymerase in DNA replication?
It adds new bases to the forming DNA strand
It breaks the hydrogen bonds between bases
It seals the new strand once it is made
What is the role of DNA Ligase in DNA replication?
It breaks the hydrogen bonds between bases
It seals the new strand once it is done
It adds new bases to the forming strand
What is the Y shaped region that forms on the DNA strand as it is being unzipped?
Replication fork
helicase fork
Okazaki fragment
ligase fork
