Mastering KCSE Biology with Comprehensive Topical Questions and Answers
K.C.S.E Biology Q & A - MODEL 2007PP1QN01
What is meant by the term binomial nomenclature
answer
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K.C.S.E Biology Q & A - MODEL 2006PP1QN27
Name the end products of the light stage in photosynthesis.
answers
K.C.S.E Biology Q & A - MODEL 2006PP1QN18
How does substrate concentration affect the rate of enzyme action?
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K.C.S.E Biology Q & A - MODEL 2006PP1QN18
State two functions of bile juice in the digestion of food.
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K.C.S.E Biology Q & A - MODEL 2006PP1QN17
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 six molars. Write its dental formula.
K.C.S.E Biology Q & A - MODEL 2006PP1QN17
What is the function of carnassials teeth?
answer
K.C.S.E Biology Q & A - MODEL 2006PP1QN17
Distinguish between the terms homodont and heterodont.
answers
​Homodont – having same kind/ type/ similar teeth.while Heterodont – having different type kind of teeth
K.C.S.E Biology Q & A - MODEL 2006PP1QN12
An experiment was set up in the experiment as show below.
The set up was left for 30 minutes.
a) State the expected results. b) Explain your answer in (a) above
answers
​(a) Visking tubing will become turgid; accept will increase in volume / bulges/ swells/ becomes bigger/ expands.
(b) Sucrose solution is hypertonic/ water is hypotonic; water moves from beaker into visking tube by osmosis though semi permeable visking tubing, making visking tubing turgid. Or water moves from beaker into visking tubing by osmosis, through semi permeable visking tubing; with hypertonic solution.
K.C.S.E Biology Q & A - MODEL 2006PP1QN11
State the role of insulin in human body.
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K.C.S.E Biology Q & A - MODEL 2006PP1QN08
State the role of vitamin C in humans.
answers
​Prevents scurvy/ prevent bleeding of gums/ prevent bleeding of gums/ Prevents poor healing of wounds/ prevent degeneration of muscle and cartilages/ prevent red spot on skin/ prevent anemia
Excretion absorption of iron Enables absorption of iron Boost immunity Development of healthy gums Synthesis/ maintenance of collagen fibres/ connective
K.C.S.E Biology Q & A - MODEL 2006PP1QN06
State three characteristics of Monera that are not found in other kingdoms.
answers
K.C.S.E Biology Q & A - MODEL 2006PP1QN01
The diagram below represents a cell organelle.
​(i) Name the part labeled Y.
(ii) State the functions of the part labeled X.
answers
​(i) Stroma
(ii) Bearing photosynthesis pigments/ chlorophyll/ site for light dependent reaction/ site for photolysis
K.C.S.E Biology Q & A - MODEL 2006PP1QN01
State the functions of cristae in mitochondria.
answers
Name two modern methods of food preservation and for each state the biologic principle behind it.18/6/2020
K.C.S.E Biology Q & A - MODEL 2005PP1QN16
Name two modern methods of food preservation and for each state the biologic principle behind it.
answers
b) Refrigeration
It inactivates disease causing organisms/micro-organisms. Irridation –The radiation kills/destroys the micro-organism. Pasteurization (for milk only) Canning-Kills the micro – organisms.
K.C.S.E Biology Q & A - MODEL 2005PP1QN16
Name two organisms that cause food spoilage
answers
​a) - Fungus
-Bacteria
K.C.S.E Biology Q & A - MODEL 2005PP1QN10
Name the organism that causes amoebic dysentery.
answer
​K.C.S.E Biology Q & A - MODEL 2005PP1QN07
State the importance of osmosis in plants.
answers
K.C.S.E Biology Q & A - MODEL 2005PP1QN05
To which class does an animal with two body parts and four Pairs of legs belong?
ANSWERS
K.C.S.E Biology Q & A - MODEL 2005PP1QN03
What is the role of the vascular bundles in plant nutrition?
ANSWERS
K.C.S.E Biology Q & A - MODEL 2005PP1QN02
The diagram below represents a cell.
​(a) Name the parts labeled X and Y
X …………………………………….. Y …………………………………….. (b) Suggest why the structures labelled X would be more on one side than the other.
ANSWERS
​a) X – Chloroplast
Y – Cell vacuole / sap vacuoles b) To receive maximum amount of light.
K.C.S.E Biology Q & A - MODEL 2004PP1QN16
Outliner three roles of active transport in the human body
answers
K.C.S.E Biology Q & A - MODEL 2004PP1QN16
how do the following factors affect the rate of diffusion?
i) Diffusion gradient ii) Surface area volume ratio iii) Temperature
answers
(i) The higher diffusion gradient between ( two points) the rate of diffusion; acc converse.
(ii) The higher the surface area:: Volume ratio, the faster is the rate of diffusion ; acc converse (iii) Increasing temperature increases the rate of diffusion; acc converse.
K.C.S.E Biology Q & A - MODEL 2004PP1QN16
What is diffusion
answers
K.C.S.E Biology Q & A - MODEL 2004PP1QN08
Name the class in the phylum arthropoda which has the largest number of individuals?
answer
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