Mastering KCSE Biology with Comprehensive Topical Questions and Answers
K.C.S.E Biology Q & A - MODEL 2007PP1QN13
Name the products of anaerobic respiration in
(i) Plants (ii) Animals
ANSWERS
(i) Ethanol and carbon (iv) oxide
(ii) Lactic acid
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K.C.S.E Biology Q & A - MODEL 2007PP1QN12
Name two structures for gaseous exchange in aquatic plants
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN11
State tow ways in which the blood cells are adapted to their function
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN11
What prevents blood in veins from flowing backwards?
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN10
The diagram below represents a plant tissue
​(a) Name the tissue
(b) Name the cells labeled K and L. K………………………………………………………………………. L………………………………………………………………………. (c) What is the function of the companion cell?
ANSWERS
​(a) Phloem tissues
(b) K- companion cell L – sieve tube (c) Supply nutrients and energy to the sieve tubes
K.C.S.E Biology Q & A - MODEL 2007PP1QN09
State two ways in which the root hairs are adapted to their function
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN08
State two functions of potassium in the human body
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN08
Name a fat soluble vitamin manufactured by the human body
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN07
The diagram below represents a section though a human tooth
​(a) (i) Name the type of tooth shown
(ii) Give a reason for your answer in (a) (i) above (b) State the functions of the structures found in part labeled J
ANSWERS
(a) (i) Pre- molar tooth
(ii) presence of two roots (iii)Presence of cusps of the crown (b) Has nerve cells that increase sensitivity of the tooth to heat and pain Has a blood vessel that provides nourishment to the tooth and remove waste products
K.C.S.E Biology Q & A - MODEL 2007PP1QN06
Describe what happens during the light stage of photosynthesis
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN04
State three functions of Golgi apparatus
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN03
Plant cells do not burst when immersed in distilled water. Explain
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN02
Give a reason why staining is necessary when preparing specimens for observation under the microscope
ANSWER
What is the formula for calculating linear magnification of a specimen when using a hand lens?21/6/2020
K.C.S.E Biology Q & A - MODEL 2007PP1QN02
What is the formula for calculating linear magnification of a specimen when using a hand lens?
K.C.S.E Biology Q & A - MODEL 2007PP1QN01
Give two reasons why classification is important
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN01
What is meant by the term binomial nomenclature
answer
K.C.S.E Biology Q & A - MODEL 2006PP2QN05
The diagram below represents human foetus in a uterus.
a) Name the part labeled S.
b) i) Name the types of blood vessels found in the structure labeled Q. ii) State the differences in composition of blood found in the vessels named in (b)(i) above. c) Name two features that enable the structure labeled P carry out its function. d) State the role of the part labeled R
answers
(a) Chorion
(b) (i) Arteries; veins (ii) More food nutrients; more oxygen in veins less food nutrients more excretory products in arteries (c) Highly vascular zed; large surface area Presence of secretory cells (d) Cushion/ absorb shock K.C.S.E Biology Q & A - MODEL 2006PP2QN04
The diagram below represents a traverse section through a plant organ
​A. From which plant organ was the section obtained?
B. Give two reasons for your answer in (a) above. C. Name the parts labeled J,K and L. D. State two functions of the part labeled M.
answers
(a) Root
(b) Presence of root hairs Presence of endodermis Xylem star shaped at centre Phloem at arms of the xylem (c) J- Epidermis K- Phloem L – Xylem (d) - Absorption of water Absorption of minerals salts Give three reasons for loss of energy from one trophic level to another in the food chain.19/6/2020
K.C.S.E Biology Q & A - MODEL 2006PP2QN03
Give three reasons for loss of energy from one trophic level to another in the food chain.
answers
K.C.S.E Biology Q & A - MODEL 2006PP2QN03
Distinguish between pyramid of numbers and pyramid of biomass.
answers
K.C.S.E Biology Q & A - MODEL 2006PP2QN02
In mice the allele for black fur is dominant to the allele for brown fur. What percentage offspring would have brown fur form across between heterozygous black mice? Show your working. Use letter B to represent the allele for black colour.
K.C.S.E Biology Q & A - MODEL 2006PP2QN02
Describe the following chromosomal mutations.
a. Inversion b. Translocation.
answers
(i) Occurs when chromatids/ chromosomes break at 2 places and when rejoining the Middle piece rotates and joins in an inverted position.
(ii) Occurs when a section of chromatid break off and becomes attached to another chromatid of another chromosome.
K.C.S.E Biology Q & A - MODEL 2006PP2QN02
Name two disorder in human caused by gene mutation.
answers
K.C.S.E Biology Q & A - MODEL 2006PP2QN01
The diagram below represents bones at a joint found in the hind limb of a mammal.
a) Name the bones labeled XY and Z
b) i) Name the substance found in the place labeled W. ii) State the function of the substance named in (b) (i) above. c) Name the structure that joins the bones together at the joint. d) State the differences between ball and socket joint and the one illustrated in the diagram above. e) Name the structure at the elbow that performs the same function as the same function as the patella.
answers
​(a) X- Femur
Y- Tibia Z- Fibula (b) (i) Synovial fluid (ii) Lubrication of the joint/ shock absorption Distribution of pressure (c) Ligament (d) Ball and socket joint allows movement in all planes while the illustrated allows movement in one plane only. Accept 3600 for all planes 1800 for one plane. (e) Olecranon process. |
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