Biology Form 1 Questions and Answers – Free Revision Material

biology form 1 questions and answers

Biology Form 1 Questions and Answers

1. What is the basic unit of life?

Answer: The basic unit of life is the cell.

2. What are the two main types of cells?

Answer: The two main types of cells are prokaryotic cells and eukaryotic cells.

3. What is the function of the cell membrane?

Answer: The cell membrane controls the movement of materials in and out of the cell and also gives the cell its shape.

4. What are the three main parts of a cell?

Answer:

i.              cell membrane

ii.             cytoplasm

iii.            nucleus

5. What is the function of the cytoplasm?

Answer: The cytoplasm is the jelly-like substance that fills the cell and contains the cell’s organelles. It also serves as the site for many chemical reactions.

6. What is the function of the nucleus?

Answer: The nucleus contains the cell’s genetic material, or DNA, and controls the cell’s activities.

7. What is the function of chlorophyll?

Answer: Chlorophyll is a green pigment found in plants that absorbs light energy and converts it into chemical energy through photosynthesis.

8. What is the process of photosynthesis?

Answer: Photosynthesis is the process by which plants convert light energy into chemical energy, which is stored in the form of glucose.

9. State the function of mitochondria.

Answer: Mitochondria are the powerhouses of the cell, they convert energy stored in food into a form that the cell can use.

10. What is the process of respiration?

Answer: Respiration is the process by which cells convert glucose and oxygen into energy and carbon dioxide.

11. What are the products of respiration?

Answer:

i.              carbon dioxide

ii.             water

12. What is the role of enzymes in metabolism?

Answer: Enzymes are biological catalysts that speed up the rate of metabolic reactions.

13.What is the function of DNA?

Answer: DNA contains the genetic information that determines an organism’s characteristics.

14. What is the process of reproduction?

Answer: Reproduction is the process by which an organism produces new individuals that have the same genetic information as the parent.

15. What are the two types of reproduction?

Answer:

i.              asexual 

ii.             sexual

16. What is the function of hormones?

Answer: Hormones are chemical messengers that help coordinate the body’s activities.

17. What is the function of the immune system?

Answer: The immune system helps protect the body from harmful pathogens and other foreign substances.

18. What is the function of the nervous system?

Answer: The nervous system helps coordinate the body’s activities by sending and receiving electrical signals.

19. What is the function of the circulatory system?

Answer: The circulatory system helps transport oxygen, nutrients, and other substances to the body’s cells.

20. What is the function of the respiratory system?

Answer: The respiratory system helps the body take in oxygen and get rid of carbon dioxide.

21. State the main function of the cell membrane?

Answer: The main function of the cell membrane is to separate the contents of the cell from its external environment, regulating the movement of materials in and out of the cell.

22. What are the two types of muscle tissue?

Answer:

i.              skeletal muscle

ii.             cardiac muscle

23. What is the function of the mitochondria in a cell?

Answer: The function of the mitochondria in a cell is to generate energy for the cell in the form of ATP (adenosine triphosphate).

24. What is the structure of DNA?

Answer: The structure of DNA is a double helix, made up of two complementary strands of nucleotides.

25. What is the process of photosynthesis?

Answer: The process of photosynthesis is the conversion of light energy into chemical energy by plants, algae and some bacteria, in which water and carbon dioxide are converted into glucose and oxygen.

26. What is the function of the digestive system?

Answer: The digestive system helps break down food into molecules that the body can use for energy and growth.

27. What is the function of the excretory system?

Answer: The excretory system helps remove waste products and excess water from the body.

28. What is the function of the skeletal system?

Answer: The skeletal system provides support and protection for the body’s internal organs and allows for movement.

29. What is the function of the muscular system?

Answer: The muscular system allows for movement and generates heat to keep the body warm.

30. What is the function of the reproductive system?

Answer: The reproductive system produces and transports the sex cells, which are necessary for reproduction.

31. What is the function of the endocrine system?

Answer: The endocrine system helps regulate the body’s growth, metabolism, and other activities by producing hormones.

32. What is the function of the lymphatic system?

Answer: The lymphatic system helps defend the body against disease by producing white blood cells and removing waste products.

33. What is the difference between prokaryotic cells and eukaryotic cells?

Answer: Prokaryotic cells do not have a nucleus or other membrane-bound organelles, while eukaryotic cells have a nucleus and other membrane-bound organelles.

34. What is the difference between autotrophic and heterotrophic organisms?

Answer:  Autotrophic organisms can produce their own food, while heterotrophic organisms must consume other organisms for food.

35. Explain the difference between asexual and sexual reproduction:

Answer:  Asexual reproduction does not involve the formation of sex cells, while sexual reproduction involves the formation of sex cells.

36. What are the four main macromolecules?

Answer:  The four main macromolecules are carbohydrates, lipids, proteins, and nucleic acids.

37. What is the function of carbohydrates?

Answer: Carbohydrates provide energy for the body and also serve as structural components.

38. What is the function of lipids?

Answer: Lipids store energy and help insulate the body.

39. What is the function of proteins?

Answer: Proteins serve as enzymes, hormones, and structural components of the body.

40. What is the function of nucleic acids?

Answer: Nucleic acids store and transmit genetic information.

41. What is the difference between DNA and RNA?

Answer: DNA contains the genetic information for the cell, while RNA helps to read that information and translate it into proteins.

42. What is the process of mitosis?

Answer: Mitosis is the process by which a cell divides to form two identical daughter cells.

43. What is the process of meiosis?

Answer: Meiosis is the process by which sex cells are formed, resulting in cells with half the number of chromosomes as the parent cell.

44. What is the difference between mitosis and meiosis?

Answer: Mitosis results in cells with the same number of chromosomes as the parent cell, while meiosis results in cells with half the number of chromosomes as the parent cell.

45. What is the difference between adaptation and evolution?

Answer: Adaptation refers to the process by which an organism changes over time to better survive in its environment, while evolution refers to the process by which new species arise through natural selection.

46. What is the difference between a species and a population?

Answer: A species is a group of organisms that can interbreed and produce fertile offspring, while a population is a group of individuals of the same species living in the same area.

47. What are the different levels of organization in living things?

Answer: The levels of organization in living things are cells, tissues, organs, organ systems, and organisms.

48. What is the function of a cell membrane?

Answer: The cell membrane controls the movement of materials in and out of the cell, and also gives the cell its shape.

49. What is the process of diffusion?

Answer: Diffusion is the movement of particles from an area of high concentration to an area of low concentration.

50. What is the process of active transport?

Answer: Active transport is the movement of particles across a membrane against a concentration gradient, requiring energy.

51. What is the difference between a prokaryotic cell and a eukaryotic cell?

Answer: Prokaryotic cells do not have a nucleus or other membrane-bound organelles, while eukaryotic cells have a nucleus and other membrane-bound organelles.

52. What are the three main types of nutrients?

Answer: The three main types of nutrients are carbohydrates, lipids, and proteins.

53. What is the process of homeostasis?

Answer: Homeostasis is the maintenance of a stable internal environment in the body, despite changes in the external environment.

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