SS 2 Biology 1st Term Exam 23/24
  • 1. Diffusion is the movement of particles from an area of ______ concentration to an area of ______ concentration.
A) higher, lower
B) lower, higher
C) none of the above
D) equal, equal
  • 2. Which of the following states of matter does diffusion occur in?
A) Liquid
B) Solid
C) Gas
D) All of the above
  • 3. Osmosis is the movement of ______ molecules across a selectively permeable membrane.
A) Oxygen
B) Glucose
C) Carbondioxide
D) Water
  • 4. Which of the following phenomena is NOT related to osmosis?
A) Flaccidity
B) Plasmolysis
C) Turgidity
D) Haemolysis
  • 5. The process of water moving from an area of lower solute concentration to an area of higher solute concentration is called:
A) Turgidity
B) Diffusion
C) Osmosis
D) Plasmolysis
  • 6. Which of the following is an example of a beneficial microorganism?
A) Bacteria aiding in digestion
B) Fungi causing athlete's foot
C) Virus causing the flu
D) Bacteria causing pneumonia
  • 7. Which of the following is NOT a mode of transmission for diseases caused by microorganisms?
A) Airborne
B) Waterborne
C) Vector-borne
D) Genetic inheritance
  • 8. HIV stands for:
A) Human Immunodeficiency Virus
B) Human Influenza Virus
C) Highly Infectious Virus
D) Human Intestinal Virus
  • 9. Which of the following is a symptom of HIV?
A) Fatigue
B) Skin rash
C) Persistent cough
D) All of the above
  • 10. The maintenance of good health involves:
A) Adequate sleep
B) All of the above
C) Regular exercise
D) Proper nutrition
  • 11. Which organization is responsible for coordinating international public health efforts?
A) NMA (National Medical Association)
B) Red Cross Society
C) WHO (World Health Organization)
D) UNICEF (United Nations Children's Fund)
  • 12. Autotrophs are organisms that:
A) None of the above
B) Produce their own food
C) Break down dead organic matter
D) Depend on other organisms for food
  • 13. Heterotrophs obtain their food by:
A) Chemosynthesis
B) Consuming other organisms
C) Photosynthesis
D) Decomposing organic matter
  • 14. Which of the following represents a trophic level in a food chain?
A) Secondary consumers
B) Primary consumers
C) Producers
D) All of the above
  • 15. The energy flow along trophic levels can be represented by a:
A) Pyramid of Biomass
B) Pyramid of Number
C) All of the above
D) Pyramid of Energy
  • 16. Plasmolysis occurs when a plant cell:
A) Bursts due to excessive water intake
B) Loses water and becomes flaccid
C) Gains water and becomes turgid
D) None of the above
  • 17. Which of the following is an example of a vector?
A) Mosquito transmitting malaria
B) Bacteria causing food poisoning
C) Virus causing the common cold
D) Fungi causing athlete's foot
  • 18. Which of the following is NOT a way to control vectors?
A) Elimination of breeding sites
B) Vaccination
C) Use of bed nets
D) Use of insecticides
  • 19. Which of the following is NOT a role of the Red Cross Society?
A) Conducting medical research
B) Blood donation and transfusion services
C) Promoting health education
D) Providing humanitarian aid during disasters
  • 20. Decomposers play a crucial role in ecosystems by:
A) Breaking down dead organic matter
B) Producing oxygen through photosynthesis
C) None of the above
D) Providing food for other organisms
  • 21. The first process of glycolysis begins with the phosphorylation of glucose to ......
A) glucose -6-phosphate
B) Oxaloacetic acid
C) Acetyl coenzyme A
D) Pyruvic acid
  • 22. The resting phase of the cell in mitosis is .......
A) Interphase
B) Metaphase
C) Telophase
D) Anaphase
  • 23. Kreb's cycle is also called........
A) Tricarboxylic acid cycle
B) Acetyl co A cycle
C) Glycolysis
D) Carboxylic acid cycle
  • 24. When the surrounding solution is concentrated that the solution in the cell, the solution is said to be .........
A) Isotonic
B) Hypotonic
C) Hypnotonic
D) Hypertonic
  • 25. The following are factors affecting diffusion except..........
A) Temperature
B) Size of container
C) Size of particules
D) Surface area
  • 26. Which of the following cell organelles is responsible for the packaging and distribution of materials?
A) Vacuole
B) Golgi bodies
C) Nucleolus
D) Lysosome
  • 27. .......... contains the DNA which stores genetic traits.
A) Mitochondria
B) Centrioles
C) Endoplasmic reticulum
D) Chromosomes
  • 28. In the laboratory, turbidity can be measured with a ..............
A) Spectrophotometer
B) Geiger muller counter
C) Turbidometer
D) Speedometry
  • 29. Organisms referred to as causative agents and disease-inducing micro-organisms are......
A) Pathogens
B) Antibodies
C) Vectors
D) Antigens
  • 30. Animal diseases caused by protozoa are the following except ......
A) Gummosis
B) Trypanosomiasis
C) Trichomoniasis
D) Coccidiosis
  • 31. Which process involves the division of a single cell into two identical daughter cells?
A) Cell differentiation
B) Mitosis
C) Meiosis
D) Cell enlargement
  • 32. Which type of growth occurs at the tips of roots and shoots, leading to an increase in length?
A) Apical growth
B) Meiotic growth
C) Mitotic growth
D) Auxiliary growth
  • 33. Which of the following is responsible for regulating growth in plants?
A) Enzymes
B) Sunlight
C) Nutrients
D) Hormones
  • 34. What is the process by which cells convert glucose and oxygen into carbon dioxide, water, and energy?
A) Fermentation
B) Cellular respiration
C) Glycolysis
D) Photosynthesis
  • 35. Which process of cellular respiration occurs in the presence of oxygen and involves the breakdown of glucose?
A) Kreb's cycle
B) Catabolism
C) Fermentation
D) Anaerobic respiration
  • 36. What is the first step of anaerobic respiration, where glucose is converted into pyruvate?
A) Kreb's cycle
B) Fermentation
C) Glycolysis
D) Electron transport chain
  • 37. Which process of cellular respiration produces the most energy in the form of ATP?
A) Glycolysis
B) Fermentation
C) Aerobic respiration
D) Catabolism
  • 38. What is the primary source of energy released during cellular respiration?
A) Water
B) Oxygen
C) Glucose
D) Carbon dioxide
  • 39. Which of the following is the correct equation for aerobic respiration?
A) Glucose + Oxygen → Carbon dioxide + Water + Energy
B) Carbon dioxide + Water + Energy → Glucose + Oxygen
C) Glucose + Water + Energy → Carbon dioxide + Oxygen
D) Oxygen + Water + Energy → Glucose + Carbon dioxide
  • 40. Which process occurs in the absence of oxygen and results in the production of lactic acid or ethanol?
A) Kreb's cycle
B) Fermentation
C) Catabolism
D) Aerobic respiration
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