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BIOLOGY TOPIC BY TOPIC QUESTIONS AND ANSWERS

Biology topic by topic questions and answers , you can download all the biology questions and answers for all topics for form 1, form 2, form 3 and form 4., the list includes all biology questions with their answers. use  the links below. click on  a link to a specific material., form 4_heredity questions, form 4_heredity answers, form 4_cell divsion questions, form 4_cell division answers, form 4_applied genetics questions, form 4_applied genetics answers, form 4_4. support and movement in plants and animals q, form 4_4. support and movement in plants and animals a, form 4_3. reception response and co ordination q, form 4_3. reception response and co ordination a, form 4_2. evolution q, form 4_2. evolution a, form 4_1. genetics q, form 4_1. genetics a, form 4 - support and movement in plants and animals questions - teacher.co.ke, form 4 - support and movement in plants and animals a - teacher.co.ke, form 4 - reception, response and co-ordination questions - teacher.co.ke, form 4 - reception, response and co-ordination a - teacher.co.ke, form 4 - genetics questions - teacher.co.ke, form 4 - genetics a - teacher.co.ke, form 4 - evolution questions - teacher.co.ke, form 4 - evolution a - teacher.co.ke, form 3_plant reproduction questions, form 3_plant reproduction answers, form 3_personal health questions, form 3_personal health answers, form 3_human reproduction questions, form 3_human reproduction answers, form 3_asexual reproduction questions, form 3_asexual reproduction answers, form 3_4. growth and development q, form 3_4. growth and development a, form 3_3. reproduction in plants and animals q, form 3_3. reproduction in plants and animals a, form 3_2. ecology q, form 3_2. ecology a, form 3_1. classification ii q, form 3_1. classification ii a, form 3 - reproduction in plants and animals questions - teacher.co.ke, form 3 - reproduction in plants and animals a - teacher.co.ke, form 3 - growth and development questions - teacher.co.ke, form 3 - growth and development a - teacher.co.ke, form 3 - ecology questions - teacher.co.ke, form 3 - ecology a - teacher.co.ke, form 3 - classification ii questions - teacher.co.ke, form 3 - classification ii a - teacher.co.ke, form 2_transport plants questions, form 2_transport plants answers, form 2_skin temperature questions, form 2_skin temperature answers, form 2_food diet questions, form 2_food diet answers, form 2_excretion questions, form 2_excretion answers, form 2_digestion questions, form 2_digestion answers, form 2_breathing questions, form 2_breathing answers, form 2_blood circulation questions, form 2_blood circulation answers, form 2_5. excretion and homeostasis q, form 2_5. excretion and homeostasis a, form 2_4. respiration q, form 2_4. respiration a, form 2_3. gaseous exchange q, form 2_3. gaseous exchange a, form 2_2. transport in animals q, form 2_2. transport in animals a, form 2_1. transport in plants q, form 2_1. transport in plants a, form 2 - transport in plants questions - teacher.co.ke, form 2 - transport in plants a - teacher.co.ke, form 2 - transport in animals questions - teacher.co.ke, form 2 - transport in animals a - teacher.co.ke, form 2 - respiration questions - teacher.co.ke, form 2 - respiration a - teacher.co.ke, form 2 - gaseous exchange questions - teacher.co.ke, form 2 - gaseous exchange a - teacher.co.ke, form 2 - excretion and homeostasis questions - teacher.co.ke, form 2 - excretion and homeostasis a - teacher.co.ke, form 1_respiration questions, form 1_respiration answers, form 1_photosynthesis questions, form 1_photosynthesis answers, form 1_diffusion osmosis questions, form 1_diffusion osmosis answers, form 1_cells tissues questions, form 1_cells tissues answers, form 1_cell chemistry questions, form 1_cell chemistry answers, form 1_6. nutrition in animals q, form 1_6. nutrition in animals a, form 1_5. nutrition in plants q, form 1_5. nutrition in plants a, form 1_4. cell physiology q, form 1_4. cell physiology a, form 1_3. the cell q, form 1_3. the cell a, form 1_2. classification i q, form 1_2. classification i a, form 1_1. introduction to biology q, form 1_1. introduction to biology a, form 1 - the cell questions - teacher.co.ke, form 1 - the cell a - teacher.co.ke, form 1 - nutrition in plants questions - teacher.co.ke, form 1 - nutrition in plants a - teacher.co.ke, form 1 - nutrition in animals questions - teacher.co.ke, form 1 - nutrition in animals a - teacher.co.ke, form 1 - introduction to biology questions - teacher.co.ke, form 1 - introduction to biology a - teacher.co.ke, form 1 - classification i questions - teacher.co.ke, form 1 - classification i a - teacher.co.ke, form 1 - cell physiology questions - teacher.co.ke, form 1 - cell physiology a - teacher.co.ke.

biology form one essay questions

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biology form one essay questions

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Biology Form 1 Topical Revision Questions and Answers (5)

For the preparation of national and local exams, get biology form 1 topical revision questions with answers for  free .

These biology topical revision questions are aggregated from the various high school KICD approved textbooks, including KLB biology form 1, Finder biology form 1, Mentors biology form 1, Spotlight biology form 1, Moran biology form 1, Pearsons biology form 1, etc.

The biology topical revision questions with answers cover various topics, as shown below.

The form 1 biological concepts that you can revise with these topical revision questions include;

  • An Introduction to Biology
  • Classification 1
  • Cell Physiology
  • Nutrition in plants and animals 

You can get the topical revision questions for free without having to pay a cent on our  EasyElimu Study App , which you can get from the Google Playstore  here .

As a bonus, if you need to refresh your knowledge on a topic, EasyElimu has summarized notes, so you won’t have to stress over looking for notes , which makes passing that summative biology form 1 term 3 exam easy.

Whether it’s term 1, 2 or 3, these free biology form 1 revision topical questions will give you that grade A.

Visit the EasyElimu App to get the answers to the topical revision questions for free.

Alternatively, click the blue download notes button on this page to download in PDF format the specific topical revision questions with answers

Questions per topic

Introduction to biology questions and answers - form 1 biology topical revision.

  • Write three major differences between plants and animals.
  • List the uses of the energy obtained from the process of respiration.
  • State three characteristic similar in plants and animals.
  • Motor vehicles move, use energy and produce carbon dioxide and water. Similar characteristics occur in living organisms yet motor vehicles are not classified as living. List other characteristics of living things that do NOT occur in motor vehicles.

Classification 1 Questions and Answers - Form 1 Biology Topical Revision

  • What is meant by the term binomial nomenclature? (1 mk)
  • Give two reasons why classification is important. (2 mks)
  • Classification
  • Binomial nomenclature.
  • Ascaris lumbricoides is an example of an endoparasite. The name Ascaris refers to
  • Black jack ( Bidens pilosa) belong to the family compositae. What does pilosa stand for? (1 mk)
  • Define the term species. (1mk)
  • Distinguish between Taxonomy and taxon. (1mk)
  • Give two characteristics that distinguish scientific names of organisms from the ordinary names  
  • Name the branch of Biology that deals with the study of animals
  • Write the name correctly
  • Identify the genus and species names 

The Cell Questions and Answers - Form 1 Biology Topical Revision

  • Skeletal muscle cell 
  • Palisade cell
  • Protein synthesis
  • Transport cell secretions

diagram represents cell

  • Name the parts labeled x and y
  • Suggest why the structures labeled x would be more on one side than the other side.
  • State the function of cristae in mitochondria (1mk)

cell organelle

  • Name the part labeled Y (1mk)
  • State the function of the part labeled X (2 mks)
  • What is the formula for calculating linear magnification of a specimen when using a hand lens? (1mk)
  • Give a reason why staining is necessary when preparing specimens for observation under the microscope. (1mk)
  • State three functions of Golgi apparatus. (3mks)
  • Name two structures found in plant cell but are absent in animals cell.
  • Root hair cell
  • Red blood cell
  • The diameter field of view of a light microscopic is 3.5mm. Plant cells lying of the diameter are 10. Determine the size of one cell microns (1mm = 1000μm)
  • Organ system
  • Digestion and destruction of worn out organelles.
  • Osmoregulation
  • Use of a sharp cutting blade

cells in a field of view

  • Plasma membrane
  • What is the of nucleus of a cell made up of?
  • In a laboratory exercise a student observing a drop of pond water under a microscope saw and drew a spirogyra. If the magnification of the eye-piece was x5 and that of the objective lens was x100, what was the magnification of the spirogyra?
  • If the spirogyra has a length of 5cm at the above magnification, calculate the actual length in micrometers

organelle to name

  • How is the organelle you have identified in (a) above suited to its function
  • Synthesize ribosomes
  • Regulate exchange of substances in and out of the nucleus
  • State the roles of enzyme catalase in living cells
  • Which factor inactivates enzyme?

certain cell organelle

  • Identify the cell organelle
  • What is the function of the part labelled A
  • Osmoregulation in amoeba
  • Carries out digestion and destruction of worn out cell organelles
  • State three properties of the cell membrane

plant cell

  • Name a carbohydrate which forms part of the structure labelled S
  • State two functions of the part labelled R
  • Name two structures present in the diagram but absent in the animal cell
  • Biochemistry

representation of a cell

  • Chloroplasts
  • What is the formula for calculating linear magnification of a specimen when using a hand lens
  • Centrioles ;
  • Cell membrane
  • Name parts labelled X and Y
  • Suggest why the structures labelled X would be more on one side than the other
  • During a practical class, form fours estimated the field of view to be 3.5mm. Using the low power objective, they observed spirogyra cells across the same field of view and counted 8cells. Calculate the size of each cell and give your answer in micrometer.
  • Magnification and resolution of a microscope
  • Mounting and staining of a specimen
  • Transport of packaged glycoproteins
  • Destruction of worn out cell organelles
  • Synthesis of proteins
  • Making of thin sections
  • Using a sharp blade to make the sections
  • Eye piece lens
  • Given that the diameter of the field of view of a light microscope is 2000um. Calculate the size of a cell in mm if 10 cells occupy the diameter of the field of view
  • A cell was found to have the following under a light microscope; cell membrane, irregular in shape, and small vacuoles. Identify the type of the cell above
  • Golgi apparatus
  • The eye piece lens
  • The objective lens

electron micrograph photo

  • Identify the organelle
  • State the function of the organelle
  • What is the importance of infoldings in the inner membrane.
  • Give two examples of tissues where you would expect many such organelles in animal body.

Cell Physiology Questions and Answers - Form 1 Biology Topical Revision

  • Sodium ions
  • Potassium ions
  • For each processes named in (a) (i) and (ii) above, state one condition necessary for the process to take place. (2mks)
  • Explain how water in the soil enters the root hairs of a plant. (4mks)
  • Explain how drooping of leaves on a hot sunny day is advantageous to a plant. (2mks)
  • What is diffusion? (2mks)
  • Diffusion gradient (1mk)
  • Surface area to volume ratio (1mk)
  • Temperature (1mk)
  • Outline 3 roles of active transport in the human body (2mks)
  • State the importance of osmosis in plants (3mks)

sucrose solution osmosis

  • State the expected results. (1mk)
  • Explain your answer in (a) above. (3mks)
  • Explain why plant cells do not burst when immersed in distilled water. (2mks)
  • Distinguish between diffusion and osmosis. (2mks)
  • Isotonic solution
  • Hypotonic solution
  • Hypertonic solution (3mks)
  • Addition of large amounts of salt to soil in which plants are growing kills the plants. Explain. (6mks)
  • Red blood cells burst when placed in distilled water while plant cells remain intact.
  • Fresh water protozoa like amoeba do not burst when placed in distilled water. (2mks)
  • What change was expected in strip A and B
  • Account for the change in strip A

peeled potato

  • State the expected result at the end of one hour
  • Explain the observations made in this experiment
  • Strong salt solution 
  • Distilled water
  • State three physiological processes that are involved in movement of substances across the cell membrane

potato cylinders

  • Calculate the average mass of a potato cylinders after reweighing. Show your working.
  • Explain why mass of the cylinders had increased.

red blood cell after treatment

  • Account for the shape of the cell at the end of the experiment.
  • Draw a diagram to illustrate how a plant cell would appear if subjected to the same treatment.

red blood cell in different solutions

  • What name is given to the process that occurs when the cell is placed in solution Y ?
  • Describe the process that would occur in a plant cell when placed in a similar solution as that of solution X

red blood cell in different solutions2

  • What is the name given to the process that occurs when the cell is put into solution B ?
  • Compare the results obtained when the cell is put in solution B to the results that would be obtained if a plant cell was put in the same solution.
  • Account for the results in the set-up
  • the number of red blood cells
  • the appearance of red blood cells if viewed under the microscope
  • Cells being turgid
  • Cells being thickened by cellulose
  • Cells being thickened by lignin

red blood cell in different solutions3

  • Suggest the nature of solutions X and Y .
  • Name the process A and B .
  • What would happen to normal blood cell if it were placed in a isotonic solution.
  • Name two plant processes in which diffusion plays an important role.
  • Sucrose solution
  • What would be the result in terms of length if a boiled potato was used?
  • Explain your answer in (b)(i)  above.
  • State two uses of the physiological process being demonstrated in the experiment

potato cylinders in different solutions

  • Name the structure labelled A .
  • State the function of structure B.
  • If eight of cell I were observed across the diameter of the filed of view of 0.5 mm, Work out the actual diameters of each cell in micrometers.
  • Suggest the identity of the solution Q.
  • Account for the change in cell I above.
  • State any one importance of the physiological process being demonstrated above in animals. 

Nutrition in Plants and Animals Questions and Answers - Form 1 Biology Topical Revision

  • Suggest the identity of substances K and L. (2mks) K ________________________ L ________________________
  • Other than temperature state three ways by which the rate of reaction  could be increased. (3mks)
  • Explain how substance L slowed down the reaction. (1mk)
  • State the role of light in the process of photosynthesis. (2mks) Name one product of dark reaction in Photosynthesis (1mk)
  • State one effect of magnesium deficiency in green plants.

rate of enzyme reaction graph

  • A and B (3mks)
  • B and C (2mks)
  • How can the rate of reaction be increased after point B? (1mk)
  • State two factors that affect the rate of enzyme reaction. (2mks)
  • State the function of co-factors in cell metabolism. (1 mk)
  • Give one example of a metallic co-factor. (1 mk)
  • Name two mineral elements that are necessary in the synthesis of chlorophyll.  (2mks)
  • What is the role of the vascular bundles in plants nutrition? (3mks)
  • Describe what happens during the light stage of photosynthesis. (3mks)
  • Light stage occurs
  • Dark stage occurs (2mks)
  • How is dark stage dependant on the light stage of photosynthesis? (2mks)
  • Why was the solution boiled with hydrochloric acid? (1mk)
  • To which class of carbohydrates does sugarcane belong?
  • Simple sugars combine to form complex sugar. (1mk)
  • A complex sugar is broken into simple sugar. (1mk)
  • Animals (2mks)
  • Name structural units of lipids (1mk)
  • State three important functions of lipids in living organisms. (3mks)

potted plantq12

  • What would be the colours of the regions of the leaf marked L. M and N?  (3mks)
  • What is the function of the sodium hydroxide pellets? (1mk)
  • Name the bacteria found in the root nodules of leguminous plant.  (1mk)
  • State the association of the bacteria named in a) above with the  leguminous plants. (1mk)
  • State the function of co-factors in cell metabolism.
  • Give one example of metallic co-factor.
  • Name the disease in humans that is cause by lack of vitamin C. (1mk)
  • Vitamin D (1mk)
  • Iodine (1mk)
  • Explain how birds of prey are adapted to obtaining their food. (2mks)
  • Refrigeration
  • Canning (3mks)
  • State one similarity and one difference between parasitic and predatory  modes of feeding (3mks)
  • In an investigation, the pancreatic duct of a mammal was blocked. It was  found that the blood sugar regulation remained normal while food  digestion was impaired. Explain these observations. (3mks)
  • Give a reason why lack of roughage in diet often leads to constipation.
  • What does the term digestion mean? (2mks)
  • Describe how the mammalian small intestine is adapted to its  function. (18mks)
  • State the role of vitamin C in humans. (2mks)
  • Distinguish between the terms homodont and heterodont. (1mk)
  • What is the function of carnasial teeth? (1mk)
  • A certain animal has no incisors, no canines, 6 premolars and 6  molars in its upper jaw, in the lower jaw there are 6 incisors, 2  canines, 6 premolars and 6 molars. Write its dental formula.
  • State two functions of bile juice in the digestion of food.  (2mks)
  • How does substrate concentration affects the rate of  enzyme action? (1mk)
  • Name the end-products of the light stage in photosynthesis. (2mks)

premolarq15

  • Name the type of tooth shown.
  • Give a reason for your answer in (a) (i) above. (1mk)
  • State a factor that denatures enzymes. (1mk)
  • Name a fat soluble vitamin manufactured by the human body.  (1mk)
  • State two functions of potassium ions in the human body.  (2mks)
  • The action of ptyalin stops at the stomach. Explain. (1mk)
  • Name the features that increase the surface area of small intestines.  (2mks)
  • Assimilation
  • Salivary glands
  • Liver (3mks)
  • State any three functions of the mucus, which is secreted along the wall of the  alimentary canal. (3mks)
  • Explain why the digestion of starch stops after food enters the stomach. (3mks)
  • Give an account of the adaptation of a named herbivore to its mode of feeding.  (3mks)
  • What are the contents of gastric juice and what is their role in digestion. (6mks)
  • Liver damage leads to impaired digestion of fats . Explain the  statement. (3mks)

INTRODUCTION TO BIOLOGY Questions and Answers - Form 1 Biology Topical Revision

biology form one essay questions

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Biology Form 1 Notes | Biology Form 1 Questions and Answers

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