Essential idea: The structure of DNA allows efficient storage of genetic information

1. Which of the following scientists was not involved in the discovery of the structure of DNA?
  • A. Crick
  • B. Franklin
  • C. Flemming
  • D. Watson

Q2-5: These questions are about the structure of DNA.

DNA structure
Zephrys - CC-BY-SA 3.0

2. In the image above, what makes up the backbone ?
  • A. Deoxyribose
  • B. Deoxyribose and phosphate
  • C. Bases
  • D. Ribose and phosphate
3. Base pairs make up the ‘rungs of the ladder’. Which of the following would not be found in DNA?
  • A.  Adenine – Thymine
  • B.  Guanine – Cytosine
  • C.  Uracil – Adenine
  • D.  Thymine – Adenine
4. The bases are joined to ...
  • A. phosphorous
  • B. oxygen
  • C. hydrogen
  • D. carbon
5. The complementary bases are linked by what type of bond?
  • A. Polar
  • B. Hydrogen
  • C. Covalent
  • D. Peptide

Q6-7: These questions are about the diagram below:

representation of a biological molecule


6. The diagram represents ...
  • A. a nucleoside
  • B. a nucleotide
  • C. DNA
  • D. RNA
7. The three structures are held together by which type of bond?
  • Polar
  • Hydrogen
  • Covalent
  • Peptide

8. Which row in the table below gives the correct information for RNA?

  sugar bases Number of strands
A Ribose A, C, U, G one
B Ribose A, C, T, G one
C Deoxyribose A ,C, U, G two
D Deoxyribose A, C, T, G two

9. Which answer shows the correct complementary base pairing for DNA?

  • A.
  A C T G G T A
    T A G C C U T

  • B.
  A C T G G T A
    T G A C C A T

  • C.
  A C T G G T A
    U G A C C A U

  • D.
  A C T G G T A
    G T C A A C G

10.The two strands of DNA are known as antiparallel. Which is the correct representation of this?       

  • A.  
3′ 5′
  5′ 3′

  • B.  
3′ 3′
  3′ 5′

  • C.  
5′ 3′
  3′ 5′

  • D.  
5′ 5′
  5′ 5′
Background Image by Tim Tim
CC-BY-SA 4.0