DNA Quiz
If cytosine makes up 26% of the nucleotides in a sample of DNA from an organism, then adenine would make up what percent of the bases?
24
What are the complementary base pairs?
A pairs with T G pairs with C
Which of the following is the second step of DNA replication?
DNA polymerases bring in complementary nucleotides
What is the third step of DNA replication?
DNA polymerases edit out mistakes
A cell can correct 100% of errors that occur during DNA replication.
False
How did Rosalind Franklin contribute to the discovery of the structure of DNA?
She used a technique called x-ray diffraction to reveal clues about the structure of DNA
What does DNA stand for?
deoxyribonucleic acid
James Watson and Francis Crick
discovered the structure of DNA
DNA replication results in two DNA molecules
each with one new strand and one original strand
How are the base pairs of the DNA double helix linked together?
hydrogen bonds
DNA polymerases work to
join together nucleotides in a growing, complementary DNA strand correct errors in DNA base sequences during replication
DNA is made up of what repeating monomers?
nucleotides
If DNA's structure is compared to a spiral staircase, then its stair-steps would be
paired nitrogenous bases
How can a mutation in DNA cause a disease like cancer?
some mutation errors can cause a cell to lose control over its rate of division
What are the components of a nucleotide?
sugars, phosphate groups, nitrogenous bases
The components of DNA "handrails" are ____ & ______.
sugars; phosphates
Which of the following is the first step of DNA replication?
the double helix is unwound and unzipped
Which of the following types of mutations can be passed on to the next generation? Why?
a mutation in a germ line cell; these cells become sperm or egg cells