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WorksheetsDNA history, structure and replication
Total questions: 15
Worksheet time: 8mins
Erwin Chargaff's rule of base pairing states that:
adenine pairs with thymine and guanine pairs with cytosine
adenine pairs with guanine and thymine pairs with cytosine
purines pair with pyrimidines
pyrimidines pair only with pyrimidines
Rosanlind Franklin's x-ray diffraction image of her study of DNA was noticed by Watson and Crick and led them to model what they thought the shape and structure of DNA was. What was that shape?
the double helix
the single strand
the sugar and phosphate
the four nitrogen bases
Thymine, adenine, guanine, cytosine, and uracil are classified as:
sugars
codons
nitrogen bases
nucleotides
What is the backbone of this DNA molecule made of?
sugars
nitrogen bases
sugar and phosphate
sugar and nitrogen bases
What type of bonds hold together nitrogen bases?
water bonds
covalent bonds
peptide bonds
hydrogen bonds
Using the bases on the template strand of DNA, what are the new complimentary bases for replication? Template: AGTCA
AGTCA
TCAGT
UCAGU
TCUGT
What enzyme unzips the DNA strands to allow replication to occur?
polymerase
ligase
helicase
primase
All of the following are differences between DNA and RNA except
they are both nucleic acids
the shape of the strand
the type of sugar
the specific nitrogen bases
Which of the following is not part of a molecule of DNA?
ribose sugar
deoxyribose sugar
nitrogen base
phosphate group
A strand of DNA has these bases: AGCCATGTATAC. What is the complementary DNA strand?
UCGCUACAUAUG
TGCCTAGATATAC
TCGGTACATATG
ACGGATCTATAG
How did Rosalind Franklin's x-ray diffraction image of DNA affect the work of Watson and Crick?
It was used to develop the theory of independent assortment.
It was used to determine the physical structure of DNA.
It was used to determine the four bases that make up DNA.
It was used to show that DNA was the molecule of inheritance.
Semi-conservative replication of DNA refers to the idea that___.
the two strands of DNA molecules run in opposite directions.
each new DNA molecule contains 2 new single RNA strands.
each half of the original DNA molecule is joined with a new complementary DNA strand.
DNA molecules need to unwind before duplication begins.
RNA from a chipmunk is compared to RNA from a worm. Both will contain:
the sugar ribose and the base thymine
the sugar dexoyribose and the base thymine
the sugar deoxyribose and the base uracil
the sugar ribose and the base uracil
Which nitrogenous base is normally used in the synthesis (making) of RNA but not in the synthesis (making) of DNA?
uracil
adenine
guanine
cytosine
The structure of DNA is described as a ________ formed by two strands of nucleotides.
protein molecule
double helix
polymerase chain
single spiral
