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ThinkQuest
Webcytology was created for ThinkQuest 1999.
Quizzes

DNA's chemical composition and structure

[go to this section in the Guide]
Chapter Six: DNA, RNA, and Protein Synthesis


Question 1
 A nucleotide consists of
   1.  between one and three phospholipids and protein
2.  glucose, fructose, and sucrose
3.  a phosphate group, a five-carbon sugar, and a nitrogenous base
4.  two molecules of ATP and one molecule of ADP
 

Question 2
 The two purine bases are
   1.  cytosine and thymine
2.  adenine and guanine
3.  adenine and uracil
4.  thymine and guanine
 

Question 3
 Which of these bases is found in DNA but not in RNA?
   1.  adenine
2.  cytosine
3.  guanine
4.  thymine
 

Question 4
 In the 1940s, Erwin Chargaff discovered that
   1.  DNA has about the same amount of adenine as thymine, and of cytosine as guanine
2.  all four nitrogenous bases come in nearly equal amounts
3.  DNA is the genetic material
4.  DNA exists in the shape of a double helix
 

Question 5
 James Watson and Francis Crick are now famous for hypothesizing the
   1.  structure of DNA
2.  function of DNA
3.  existence of DNA
4.  function of RNA
 

Question 6
 That a DNA molecule's sides are antiparallel means that
   1.  they frequently intersect each other
2.  the nucleotides on either side run in opposite directions
3.  they are composed of nucleotides
4.  DNA indirectly controls the production of proteins
 


 
 

ThinkQuest Team #27819 - 27819@for.net
Team: Andrew Kallem, Josh Tauberer
Coaches: Ms. Acerra, Mr. Kwitkin