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WorksheetsUnit 8 Test Review
Total questions: 24
Worksheet time: 12mins
In the last unit, we learned that the structure of DNA was the result of work done by many scientists sharing their discoveries over the course of the early 1950s. This best illustrates:
recent improvements in the scientific method
independent research
replication of results
collaborative efforts among scientists
Using radioactively labeled viruses, Hershey and Chase determined conclusively that —
DNA cannot be the molecule that contains the genetic information
DNA is the molecule that contains genetic information
protein is the molecule that contains the genetic information
DNA and protein both contain the genetic information
Which scientist is credited with developing the first “picture” of DNA using X-ray crystallography?
Rosalind Franklin
James Watson
Erwin Chargaff
Francis Crick
Because of complementary base pairing, the amount of —
cytosine (C) equals the amount of thymine (T)
adenine (A) equals the amount of thymine (T)
guanine (G) equals the amount of thymine (T)
guanine (G) equals the amount of uracil (U)
Adenine AND Guanine are represented by number —
1
2
3
4
What is represented by figure X?
Chromosome
Nucleus
Gene
DNA
The item labeled number 1 represents —
a phosphate group
a sugar
an adenine
a base
What led to the understanding of complimentary base-pairings in DNA?
The studies on the amounts of DNA bases in different organisms
The observation of X-ray photographs of a cell mitochondria
The research on RNA pairings in different organisms
The evaluation of mitosis stages in the same species
What famous model was created after the events shown in the timeline?
DNA
DAN
RNA
RAD
In 1950, Erwin Chargaff discovered that the percentage of adenine in DNA equals the percentage of thymine, and that the percentage of cytosine equals the percentage of guanine. This proved invaluable to the eventual discovery of which aspect of DNA?
Location
Volume
Structure
Solubility
Which of the following contributions was made by the scientists Watson and Crick?
Made observations that led to the identification of the structure of DNA
Proposed that the DNA molecule is a triple helix
Took an X-ray photo of a strand of DNA
Calculated that a DNA strand has unequal amounts of nitrogen bases
Complementary base pairing links together —
phosphate groups
amino acids
sugars
nitrogenous bases
Which statement about the structure of DNA is NOT true?
Long strands of DNA are twisted in the form of a double helix.
DNA consists of two strands joined together by complimentary base pairing.
DNA contains four different nitrogen bases in including adenine, guanine, cytosine and uracil.
DNA is made of linked nucleotides which are each made of a sugar, a phosphate and a nitrogen base.
The genetic code is the term for the sequence of DNA nucleotides found in the —
ribosomes of eukaryotic cells
cytoplasm of eukaryotic cells
cell membrane of eukaryotic cells
nucleus of eukaryotic cells
The two molecules that form the backbone of the DNA molecule are —
sugar and phosphate
adenine and thymine
nitrogen base and phosphate
nitrogen base and sugar
Molecules of DNA are made of long chains of —
amino acids
nucleotides
fatty acids
simple sugars
During DNA replication, what occurs?
The hydrogen bonds between sugar and phosphate molecules are broken
The covalent bonds between pairs of nitrogenous bases are broken
The hydrogen bonds between pairs of nitrogenous bases are broken
The covalent bonds between sugar and phosphate molecules are broken
The process of DNA replication is necessary before a cell—
codes for RNA molecules
makes a protein
divides into two cells
modifies lysosome enzymes
A scientist discovers that the strand of DNA the research team is using has 40% guanine and 40% cytosine. What percentage of adenine and thymine will it contain?
20% adenine, 40% thymine
30% adenine, 30% thymine
10% adenine, 10% thymine
40% adenine, 20% thymine
Look at the half of a DNA ladder.
Which of the following sequences of bases correctly connects with the shown part of DNA to make a DNA strand?
GCTG
CGAC
CGAC
LMNOP
Which describes the components of a nucleotide of DNA?
Ribose, phosphate group, cytosine
Ribose, phosphate group, uracil
Deoxyribose, phosphate group, uracil
Deoxyribose, phosphate group, adenine
Which of these would you NOT do at Old Town Road?
Take your horse
Ride 'till you can't no more
Let nobody tell you nothing
Let somebody tell you something
Which of these is not a Spiderperson?
Peter Parker
Miles Morales
Gwen Stacey
Clark Kent
Recombinant DNA was used to create dinosaurs at ______ and everything went _______.
Jurassic Park & Fine, Just Fine
Disneyland, Smoothly Until a Raptor ate Goofy
Jurassic Park & Not So Great
King's Dominion, Awesome Until a Triceratops Barfed on the Dominator
