Biology P1 Questions and Answers - Wisdom Pre-Mock Form 4 Exams 2021/2022

Share via Whatsapp

INSTRUCTIONS:

  1. Write your name, class, admission number and index number on the space provided.
  2. Answer all the questions in the spaces provided
  3. Candidates should check to ensure that all the pages are printed as indicated and that no questions are missing.
  4. This paper consists of 10 pages.


QUESTIONS

  1. Name the part of a flower that develops into:
    1. Seed [1 mark]
    2. Fruit [1 mark]
  2. State two ways in which floating leaves of aquatic plants are adapted to gaseous exchange.[2 marks]
  3. The diagram below represents a stage during cell division
    3 HAHDA
    1.                        
      1. Identify the stage of cell division [1 mark]
      2. Give two reasons for your answer in [a] [i] above [2 marks]
    2. Name the structure labeled M [1 mark]
  4.                  
    1. Distinguish between the terms [2 marks]
      Homodont and heterodont
    2. What is the function of the carnassial teeth [2 marks]
  5. A patient with blood group A was involved in a road accident and required urgent blood transfusion. His relatives were invited to donate blood.
    1. Name the compatible blood groups [2 marks]
    2. State why other blood groups were not compatible [2 marks]
  6. The flow chart shows a part of a food relationship in an ecosystem
    6 mnvahfyda
    1.                    
      1. Name the food relationship shown [1 mark]
      2. How many trophic levels are shown in the diagram [1 mark]
    2. What is the main source of energy in the ecosystem [1 mark]
  7. Name the only epidermal cell in plants that contain chloroplast [1 mark]
  8. The equation below represents a metabolic process that occurs in the mammalian lives
    Amino Acids → organic compound
                    Enzyme x
    1. Name the process that represents the above equation [1 mark]
    2. Identify the enzyme represented by x [1 mark]
    3. What is the importance of the process to the mammal [1 mark]
  9.                
    1. Name the carbohydrate that is stored in mammalian muscle [1 mark]
    2. What name is used to describe removal of indigestible and undigested food material from the alimentary canal [1 mark]
  10.                
    1. Carl Linnaeus developed the taxonomic units of classification
      1. What is taxonomy [1mark]
      2. Why was the system of classification by Carl Linnaeus described as natural system of classification [2 marks]
  11. Phagocytes also called granulocytes or polymorphs are cells found in the blood that ingest pathogens and cell debris
    1. Why are they called polymorphs. [1 mark]
    2. Name the cell organelle most abundant in phagocytes that enable them function effectively.[1 mark]
  12. Name the:
    1. Material that strengthens xylem tissue [1 mark]
    2. Tissue that is removed when the part of a plant is ringed [1 mark]
  13. The diagram below represents a cell organelle.
    13 hgavhgda
    1. State the function of this organelle [1 mark]
    2. Name each of the parts A and B
      A…………………………………………………………………………………… [1 mark]
      B …………………………………………………………………………………... [1 mark]
  14. In which two ways do guard cells differ from other epidermal cells [2 marks]
  15.                      
    1. Through cellular respiration, the chemical energy stored in glucose molecule is converted into which specific molecule [3 marks]
    2. Name the substance that speed up biochemical reaction [1 mark]
  16. During germination and early growth, the dry weight of endosperm decreases while that of embryo increase explain. [2 marks]
  17. The diagrams below show changes in the life cycle of flowering plants.
    17 uag udga
    1. Complete the table below by choosing the letters from the diagram which refers to each of the stages given. [4 marks]

      STAGE OF  LIFE  CYCLE

      LETTER

      Male gametophyte

       

      Tube nucleus

       

      Female gamete

       

      Male gamete

       
  18. State two characteristics of kingdom Monera that are not found in other kingdoms. [2 marks]
  19. State three ways by which plants compensate for lack of the ability to move from one place to another. [3 marks]
  20. State three physiological processes that are involved in movements of substances across the cell membrane. [3 marks]
  21. If the human pancrease is not functional:
    1. Name the hormone which will be deficient. [1 mark]
    2. Name the disease the human is likely to suffer from. [1 mark]
  22. The oxidation state of a certain food is represented below by a chemical equation.
    2C3 H 2O 2N + 6O2 (NH4)2 CO2 + 5CO2 + 5H2 O
    1. Calculate the respiratory quotients [RQ] of the food substance. [2 marks]
    2. Identify the food substrate [1 mark]
  23. The diagram below shows an apparatus used during collection of specimen.
    23 avyda
    1. Identify the apparatus [1 mark]
    2. What is the use of the apparatus named above [1 mark]
  24. State two physical factors in an ecosystem that affect the distribution of organisms. [2 marks]
  25. A DNA strand has the following base sequence G C C T A G A T C A C.
    What is the sequence of the
    1. Complementary DNA strand [1 mark]
    2. M-RNA strand copied from this DNA strand . [1 mark]
  26. State three limitations of fossil records as evidence of organic evolution [3 marks]
  27. Explain the term “Resistance” as used in evolution of living organisms [2 marks]
  28. tate the function of the following parts of a light microscope .
    1. Body tube [1 mark]
    2. Diaphragm [1 mark]
  29. The table below shows analogies of gene mutations. [3 marks]
     

    Intended message

    Actual message

    A

    Buy me a skirt

    Buy me a shirt

    B

    This is my team

    This is my mate

    C

    Auntie is staying

    Auntie is straying

    Identify the type of gene mutation illustrated
    A…………………………………………………………………………………
    B…………………………………………………………………………………
    C…………………………………………………………………………………
  30. State two sources of variations. [2 marks]
  31. Name the diseases caused by each of the following [2 marks]
    1. Plasmodium falciparum
    2. Entamoeba histolytica


MARKING SCHEME

  1.                          
    1. Ovule
    2. Ovary
  2. Aerenchyma tissue with large air spaces to store air.
    Large stomata found on the upper surface of the leaf
  3.                                
    1.                        
      1. Anaphase1
      2. -Homologous chromosomes separate towards the poles
        -Spindle fibres contract separating the homologous chromosomes
    2. Spidle fibre
  4.                                              
    1. –Homodont –teeth of the same size and shape
      – Heterodont –teeth of different size and shape
    2. Special pre-molars with smooth sides and sharp edges to slice through flesh and crush bones
  5.                      
    1.  -B
      -AB’
    2. O –Universal donor since they have no antigens
      A – Same blood group hence no agglutination
  6.                  
    1.                              
      1. Food web
      2. Three
    2. Sun
  7. Guard cells
  8.                        
    1. Deamination
    2. Enzyme orginaze
    3. Removal of the excess amino acids
  9.                    
    1. Glycogen
    2. Egestion
  10.                      
    1.                          
      1. Science of classification
      2. Uses evolutionary relationship between organism and their ancestor
  11.            
    1.                         
      1. They have lobed nuclei
      2. Lysosomes
  12.                        
    1. Lignin
    2. Phloem
  13.                  
    1. –Packing and transport in venicles of material such as enzyme
      – Secretion of synthesized proteins, carbohydrates
      – Process of cisternae
      – Involved in lysosome formation
    2. A. Golgi Apparatus
      B. Golgi vesicles/ bodies
  14. – Guard cells have chloroplast hence photosynthesis, epidermal cells are transparent
    –Have thicker inner walls and thin outer walls for differential expansion to facilitate opening and closing of the stomata.
    –Are bean shaped
    -Epidermal cells have uniformly thickened walls
    -Epidermal cells are rectangular flattened cells
  15.                  
    1. ATP-Adenosine triphosphate
      CO2-Carbon [IV] oxide
      H2O-Water
    2. Enzymes
  16. Food stored in the endosperm was oxidized to form energy for the process and also form new material for growth in the embryo.
  17. Embryo grows and develops forming new issues that result in increase in weight

    STAGE OF LIFE CYCLE

    LETTER

    Male  gametophyte

    D

    Tube nucleus

    G

    Female  gamete

    B

    Male gamete

    F

  18. -Their nuclear material is not enclosed within a nuclear membrane so the genetic material is not separated from the rest of the cell/Prokaryotic
    - They do not have membrane bound organelles
  19. -Plants are able to synthesize their own food.
    -Plants are able to use pollination rather than moving to seek mating partners.
    -Plants use seed and fruits dispersed to colonize new habitats.
  20. -Diffusion
    -Osmosis
    -Active transport
  21.                      
    1. Insulin, glucagon
    2. Diabetes mellitus, Hypoglycaemia
  22.                          
    1. RQ = volume of carbon[IV] oxide produced
                   Volume of oxygen consumed
      5/6 =0.83
    2. Proteins
  23.                        
    1. Pitfall trap
    2. For catching crawling animals
  24. -Temperature; Humidity
    -Light ; Atmospheric pressure
  25.                        
    1. CGGATCTAGTG
    2. CGGTUCUTGUG
  26. -Several missing links
    -Most organisms especially soft-bodied ones do not form fossils
    -Exposed fossils are usually destroyed by physical and chemical weathering
    -Most animals are preyed upon.
  27. Some individuals in a population possess genes that have undergone mutations resulting in resistance against some chemicals. The mutations establish a population of resistant forms
  28.                        
    1. Holds the eyepiece and the revolving nosepiece
    2. An aperture that regulates the amount of light passing through the condenser to illuminate the specimen.
  29. -Substitution
    -Inversion
    -insertion
  30. -Mutation
    -Crossing over during prophase of meiosis
    -Sexual reproduction [fertilization]
    -Independent assortment of chromosomes during metaphase of meiosis 1
  31.                      
    1. Malaria
    2. Amoebic dysentry
Join our whatsapp group for latest updates

Download Biology P1 Questions and Answers - Wisdom Pre-Mock Form 4 Exams 2021/2022.


Tap Here to Download for 50/-




Why download?

  • ✔ To read offline at any time.
  • ✔ To Print at your convenience
  • ✔ Share Easily with Friends / Students


Get on WhatsApp Download as PDF
.
Subscribe now

access all the content at an affordable rate
or
Buy any individual paper or notes as a pdf via MPESA
and get it sent to you via WhatsApp

 

What does our community say about us?

Join our community on:

  • easyelimu app
  • Telegram
  • facebook page
  • twitter page
  • Pinterest