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2. what is an exothermic reaction?

  • a product
  • a chemical reaction that releases energy
  • a reactants
  • a chemical reaction that takes in energy from it surroundings

3. what is a hydrocarbon?

  • an element
  • contains only hydrogen and carbon only
  • gives out hydrogen and carbon
  • DNA

4. what is a gene?

  • the basic unit of genetic material which is inherited from our parents. a section of our DNA which controls part of a cells chemistry
  • a molecule inside the cells cytoplasm ready to be passed down into the next generation
  • the chemical link that hold molecules together
  • the shape of a DNA molecule with two strands twisted together in a spiral, twisted ladder like shape

5. what does DNA stand for?

  • deoxyribonucleic acid
  • detrix acid
  • drinkordape acid
  • dofgrakejfigrate acid
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