DNA the Molecule
  • 1. DNA is made up of many
A) Bases
B) Sugar Molecules
C) Phosphate groups
D) Nucleotides
  • 2. Nucleotides have three main parts
A) Phosphate groups, deoxyribose sugars and nitrogen rich bases
B) Genes and Chromosomes X and Chromosomes Y
C) Acids, Bases and inorganic salts
D) G, T and C Bases
  • 3. The general shape of DNA is a
A) Double Helix
B) Rectangular
C) Triangular
D) Circular
E) Single Helix
  • 4. In the DNA structure (twisted rope ladder) the uprights of the ladder are alternating
A) sugar and base molecules
B) phosphate and base molecules
C) phosphate and sugar molecules
D) base molecules
  • 5. In the DNA structure (twisted rope ladder) the runs of the ladder are made up of
A) nitrogen-rich base pairs
B) phosphate and sugar molecules
C) phosphate and base molecules
D) sugar molecule pairs
  • 6. How many bases are there (in DNA)?
A) 8
B) 0
C) 4
D) 6
E) 2
  • 7. Nitrogen-rich bases pair up (complementary base pairing) in one way. A goes with
A) G
B) T
C) C
D) A
  • 8. Nitrogen-rich bases pair up (complementary base pairing) in one way. C goes with
A) G
B) C
C) T
D) A
  • 9. How many different rungs could be on the ladder of a DNA strand?
A) 2
B) 0
C) 8
D) 4
  • 10. Chromosomes are found in
A) the gene
B) the nucleus of the cell
C) the DNA strand
D) the red blood cell
  • 11. Human Cells have how many chromosomes
A) 20 (10 pairs)
B) 46 (23 pairs)
C) 100 (50 pairs)
D) 50 (25) pairs
  • 12. Sperm and Egg cells have how many chromosomes
A) 92 (double a human cell)
B) 23 (half that of a normal human cell)
C) 0 (there is no nucleus)
D) 46 (same as a human cell)
  • 13. Red blood cells have how many chromosomes
A) 23 (half that of a normal human cell)
B) 92 (double a human cell)
C) 46 (same as a human cell)
D) 0 (there is no nucleus)
  • 14. True or False: All animal cells have the same number of chromosomes as human cells (23 pairs)
A) True
B) False
  • 15. What is a gene?
A) Another name for chromosomes
B) Another name for DNA
C) A section of DNA that contains the genetic code
D) Half a chromosome
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