DNA

• Chromosomes are structures within the nucleus made up of DNA molecules coiled around proteins called histones.
• Genes are segments of DNA that contain instructions for making specific proteins or RNA molecules.
• The nucleus is the control center of the cell, containing genetic material (DNA) that determines an organism's characteristics.
• The structure of DNA consists of two strands twisted together into a double helix shape held together by hydrogen bonds between complementary base pairs (A-T and C-G).
• What are the 2 main parts of a DNA strand ?

  The back bone and bases
• What does (A) Adenine pair with ?

  (T) Thymine
• What does (G) Guanine pair with ?

  (C) Cytosine
• What does (T) Thymine pair with ?

  (A) Adenine
• What does (C) Cytosine pair with ?

  (G) Guanine