Form 2 Biology Mid Term 2 Exam with Marking Scheme

This  exam covers:

• Introduction to Biology & Classification:
  • Defining Taxonomy and Species.
• The Cell:
  • Stating main functions of a microscope.
  • Functions and adaptations of the cell wall in plant cells.
• Movement of Substances into and out of Cells:
  • Investigating a physiological process (likely osmosis) using a raw potato tuber and glucose solution.
  • Explaining results and observations in such an experiment.
  • Importance of active transport in living organisms and the role of oxygen concentration.
• Nutrition in Plants and Animals:
  • Significance of chlorophyll, stomata, leaf midrib, and veins in photosynthesis.
  • Forms in which carbohydrates are stored in plant and animal tissues.
  • Calculating the number of teeth from a dental formula.
  • Explaining the result of bile duct blockage.
  • Identifying the process of peristalsis and the role of dietary components in food movement.
  • Distinguishing between homodont and heterodont dentition.
  • Stating the function of carnassial teeth.
  • Writing a dental formula based on given information.
• Gaseous Exchange:
  • Explaining the differences in the percentage composition of carbon (IV) oxide and oxygen in inhaled and exhaled air.
• Respiration/Energy Requirements:
  • Explaining why males may require more energy than females after a certain age (based on a table, though part of the question text for 11a is missing).
  • Naming other factors (besides sex and age) that determine energy requirements in humans.
• Transport in Plants and Animals:
  • Distinguishing between single and double circulatory systems.
  • Naming defects of the circulatory system in humans.
  • Stating functions of blood other than transport.
  • Stating adaptations of xylem to water transportation.
• Enzymes:
  • Accounting for the shape of a graph showing the effect of temperature on an enzyme-catalyzed reaction ( denaturation).
  • Identifying the optimum temperature for enzyme activity.
  • Stating other factors that affect the rate of enzyme-controlled reactions.