Q.1
What is the significance of nucleic acids for cells?
  • They generate energy for the cell.
  • They restrict what enters and leaves the cell.
  • They support and maintain the shape of the cell.
  • They provide all instructions for cellular activities.
Q.2
Which organic molecule serves as a catalyst?
  • lipids
  • proteins
  • nucleic acid
  • carbohydrates
Q.3
Which best explains the function of the sequence of nucleotides?
  • It provides energy.
  • It carries genetic information.
  • It allows DNA to be successfully copied.
  • It determines the shape of the DNA molecule.
Q.4
Which is a function of lipids?
  • to supply cells with quick–release energy
  • to provide the body with insulation
  • to store genetic information
  • to regulate cell processes
Q.5
What products are produced during photosynthesis?
  • chloride and sugar
  • nitrogen and sugar
  • carbon dioxide and sugar
  • oxygen and sugar
Q.6
What are the products of aerobic cellular respiration?
  • glucose and water
  • glucose and oxygen
  • carbon, hydrogen, and water
  • carbon dioxide, water, and energy
Q.7
How do photosynthesis and cellular respiration differ?
  • Photosynthesis uses food and cellular respiration produces food.
  • Photosynthesis uses oxygen and cellular respiration uses carbon dioxide.
  • Photosynthesis breaks down carbohydrates and cellular respiration produces carbohydrates.
  • Photosynthesis gives off oxygen and cellular respiration uses oxygen.
Q.8
All organic compounds contain the element
  • carbon
  • nitrogen
  • phosphorus
  • sulfur
Q.9
What is the attraction between molecules of different substances?
  • Adhesion
  • Suspension
  • Cohesion
  • Solution
Q.10
Which energy level has the highest amount of energy?
  • first shell (closest the nucleus)
  • second shell
  • third shell (farthest from nucleus)
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