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