- Name the branch of biology involved in the study of
- Relationships of living with each other and their environment.(1mrk)
- Identification and classification of organisms.(1mrk)
- The binomial name of housefly is MUSCA DOMESTICA.
- State two mistakes in the way the scientific name is written. (2mks)
- Re-write the name in correct manner following the rules of binomial nomenclature. (1mrk.)
- State the use of each of the following apparatus: (3mrks)
- Bait trap
- Specimen bottle
- Pitfall trap
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- Give the functions of the following parts in a light microscope.(3mrks)
- Diaphragm
- Condenser
- Objective lens
- Why is it not likely to use an electron microscope in a school laboratory? 2mks
- Give the functions of the following parts in a light microscope.(3mrks)
- Study the diagram below and answer the questions that follow:
- Identify the organelle. 1mk
- Name the structure labelled K 1mk
- State two functions of the organelle named in (a) above. 2mks
- What is the importance of carrying out the following procedures when preparing temporary slides in the laboratory? (3mks).
- Adding water to the specimen.
- Staining the specimen.
- Using a sharp blade to make sections.
- A student estimating a cell size of an onion epidermal cells observed the following on the microscope field of view using a transparent ruler.
The student identified 20 cells across the field of view. Calculate the size of the cell in Micrometers (show your working) (3mks) - Define the term physiology(1mrk)
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- Name the principal components of cell membrane (3mrks)
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- Why would a cell allow some substances to pass through it but not others? (1mrks)
- Other than the property of semi- permeability stated in b (i) above, state two other properties of a cell membrane (2mrks)
- Explain what would happen to the red blood cells if placed in concentrated salt solution. 3mks
- Define the following terms(6mrks)
- Isotonic solution
- Hypotonic solution
- Hypertonic solution
- What is meant by the following biological terms?
- Crenation (2mk)
- Haemolysis (2mk)
- What role does osmosis play in plants?(2mks)
- Distinguish between diffusion and active transport (2mks)
- Define the term nutrition(2mrks)
- Name and explain the two types of nutrition(4mrks)
- Differentiate between Chemotropism and Phototropism(4mrks)
- Draw a well labelled diagram of a leaf showing the external features. (3mrks)
- Define the term photosynthesis(2mrks)
- What four conditions are needed for photosynthesis to occur?(4mrks)
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- What is the importance of photosynthesis in nature?(2mrks)
- The organelle below is important in the process of Nutrition.
- Identify the organelle. (1mk)
- Name the part labeled (2mk)
A
C
- Name the part where the following stages of photosynthesis occur(2mrks)
- Light independent stage
- Dark stage
- State the role of light in the processes of photosynthesis(1mrk)
- Name the building blocks of ;(3mrks)
- Proteins
- Carbohydrates
- Fats
- What are enzymes?(1mrks)
- State the main properties of enzymes (2mrks)
Marking Scheme
