Mastering KCSE Biology with Comprehensive Topical Questions and Answers
Name the three type of muscles found in mammals and give an example of where each of them is found21/6/2020
K.C.S.E Biology Q & A - MODEL 2007PP2QN04
Name the three type of muscles found in mammals and give an example of where each of them is found
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K.C.S.E Biology Q & A - MODEL 2007PP2QN03
The diagram below shows a stage during fertilization in a plant.
(i) Name the parts labeled Q, R, and S
R S (ii) State two functions of the pollen tube (c) On the diagram label the micropyle K.C.S.E Biology Q & A - MODEL 2007PP2QN03
What is meant by the following terms
(i) Protandry (ii) Self sterility?
answers
(i) Protandry – stamens mature and pollen grains are shed off before the stigma matures
(ii) Self sterility – Pollen grains from the anthers cannot grow on the stigma of the same flower or plant
K.C.S.E Biology Q & A - MODEL 2007PP2QN02
What term is given to the condition described in (c) (i) above
answer
K.C.S.E Biology Q & A - MODEL 2007PP2QN02
What would happen if a person produced less antidiuretic hormone?
answer
K.C.S.E Biology Q & A - MODEL 2007PP2QN02
Which portion of the human nephron are only found in the cortex?
answers
K.C.S.E Biology Q & A - MODEL 2007PP2QN02.
Explain what happens to excess amino- acids in the liver of humans
answers
K.C.S.E Biology Q & A - MODEL 2007PP2QN01
Give the scientific name of the organism that causes tuberculosis in humans
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP2QN01
The diagram below represents some gaseous exchange structures in humans
​(a) Name the structures labeled K, L, and M
K……………………………………………………………………………. L……………………………………………………………………………. M…………………………………………………………………………… (b) How is the structure labeled J suited to its function? (c) Name the process by which inhaled air moves from the structure labeled L into blood capillaries
ANSWERS
​( a) K- Pleural membranes
L- Alveolus M- Intercostal muscles (b) Has c- shaped cartilage rings that support it preventing it from collapsing and allow free flow of air Inner lining has secreting cells that trap fine dust particles and micro- organisms Inner lining has hair like structures called cilia that enhance upward movement of the mucus to the larynx (c) Diffusion
K.C.S.E Biology Q & A - MODEL 2007PP1QN26
State one way by which HIV/AIDS is transmitted from mother to child
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN25
Name the features that increase the surface area of small intestines
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN25
State a factor that denatures enzymes
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN25
The action of ptyalin stops at the stomach. Explain
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN24
Name two tissues in plants that provide mechanical support
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN24
State a characteristics that is common to all cervical vertebrae
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN23
What is thigmotropism?
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN23
Name the hormone that is responsible for apical dominance
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN22
The diagram below represents a neurone
​(i) Name the neurone
(ii) Name the parts labeled P and Q P……………………………………………………………………….. Q………………………………………………………………………. (c) State a function of myelin sheath
ANSWERS
​(b) Motor neutron
(ii) P- Dendrites Q- Axoplasm (Axon) (d) Insulates the axon
K.C.S.E Biology Q & A - MODEL 2007PP1QN22
Where in the human body are relay neurons found
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN21
Give a reason why organisms become resistant to drugs
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN21
What is adaptive radiation
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN20
What is a test- cross?
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN20
Explain how the following occur during gene mutation:
(i) Deletion (ii) Inversion
ANSWERS
(i) Occurs when some nucleotides of a part of a gene break off and disappear
(ii) Occurs when the nucleotides of a part of gene become inverted by taking a 1800 turn.
K.C.S.E Biology Q & A - MODEL 2007PP1QN20
What is meant by the term allele?
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN19
Name the part of a bean that elongates to bring about epigeal germination
ANSWER
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