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