Mastering KCSE Biology with Comprehensive Topical Questions and Answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN03
The figure below is a fine structure of a generalised animal cell as seen under an electron microscope.
​(a) Name the parts labelled A and B.
A B (b) How is the structure labelled B adapted to its function?
answers
​(a) (i) A - nucleopore;
B - Rough Endoplastic Reticulum; (b) Surface covered with ribosomes; for protein synthesis; Has interconnected channels: for transportation of proteins;
0 Comments
K.C.S.E Biology Q & A - MODEL 2012PP1QN02
The diagram below represents a certain organism collected by a student at the sea shore.
​(a) Name the class to which the organism belongs.
(b) Give three reasons for your answer in (a) above.
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN01
How does nutrition as a characteristic of living organisms differ in plants and animals?
answers
K.C.S.E Biology Q & A - MODEL 2011PP2QN05
The diagram below represents a flower.
(i) On the diagram, name two structures where meiosis occurs.
(ii) How is the flower adapted to prevent self-pollination? (ii) How is the flower adapted to prevent self-pollination? (b) The diagram below represents a human reproductive organ.
​(i) Explain two adaptations of the structure labelled L to its functions.
(ii) Explain the role of the gland labelled K.
answers
​(a) (i) Anthers; Ovary;
(ii) Anthers are below the stigma to minimise self pollination;
production; it has many, long and coiled seminiferous tubules to increase the surface area for production/storage of sperms; (ii) K produces an alkaline fluid that neutralizes acid in the vagina; this fluid contain nutrients for the sperms; and also activates sperms; K.C.S.E Biology Q & A - MODEL 2011PP2QN04
The diagram below represents a section of the human brain.
(i)Name the structures labelled P and R.
P R (ii) State two functions of the part labelled Q. (b) (i) Name two reproductive hormones secreted by the pituitary gland in women. (ii) State one function of each of the hormones named in (b)(i) above.
answers
(a) (i) - is cerebral hemisphere/cerebrum;
R - medulla oblongata; (ii) Muscular co-ordination; maintaining body posture; manual/motar dexterity; (b) (i) Follicle stimulation hormone; luteinizing hormone; oxytocin; prolactin; (ii) FSH - stimulates secretion of oestrogen; stimulates development of the Graafìan follicle; LH - Brings about ovulation; causes development of corpus luteum; Oxytocin - causes contraction of uterus; causes expulsion of milk from mammary glands; Prolactin - stimulates milk production/secretion;
K.C.S.E Biology Q & A - MODEL 2011PP2QN03
How are the pneumatophores adapted to their function?
answers
K.C.S.E Biology Q & A - MODEL 2011PP2QN03
Describe how oxygen in the alveolus reaches the red blood cells.
answers
K.C.S.E Biology Q & A - MODEL 2011PP2QN03
Name the causative agents for the following respiratory diseases.
(i) Whooping cough. (ii) Pneumonia.
answers
(a) (i) Bordetella pertussis;
(ii) Streptococcus pneumoniae; (iii) Micoplasma pneumoniae;
K.C.S.E Biology Q & A - MODEL 2011PP2QN02
Explain how comparative embryology is an evidence for organic evolution.
answer
K.C.S.E Biology Q & A - MODEL 2011PP2QN02
In humans, hairy ears is controlled by a gene on the Y Chromosome.
(a) Using letter Y^H to represent the chromosome carrying the gene for hairy ears, work out a cross between a hairy eared man and his wife. (b) (i) What is the probability of the girls having hairy ears? (ii) Give a reason for your answer in (b(i) above. K.C.S.E Biology Q & A - MODEL 2011PP2QN01
The set-up below illustrates a procedure that was carried out in the laboratory with a leaf plucked from a green plant that had been growing in sunlight.
(i) What was the purpose of the above procedure?
(ii) Give reasons for carrying out steps A, B and C in this procedure. A B C (iii) Name the reagent that was used at the step labelled D. (iv) State the expected result on the leaf after adding the reagent named in (iii) above.
ANSWERS
​(i) - Testing a leaf for the presence of starch;
(ii) - A - kill the leaf/break down cells/stop enzymatic activity; B - Removal of chlorophyll; C - Soften leaf/makes leaf less brittle; (iii) Iodine solution; (iv) Areas where starch is present stain blue/blue black; K.C.S.E Biology Q & A - MODEL 2011PP1QN17
The diagram below represents part of the human digestive system.
(a) Name the organs labelled L and M.
L M . (b) (i) Name the substance produced by the organ labelled K. (ii) State the function of the substance named in b(i) above.
answers
​.(a) L - Duodenum;
M - Pancreas; (b) (i) Bile; (ii) Emulsification/emulsifies fats; (iii) Provides alkalinic medium for enzyme action. (iv) Neutralizes acidic chyme.
K.C.S.E Biology Q & A - MODEL 2011PP1QN16
What is the role of blood platelets in the blood clotting process?
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN16
Describe the condition known as varicose veins.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN15
Give reasons for carrying out the following procedures when preparing temporary wet mounts of plant tissues.
(a) Making thin plant sections. (b) Adding water on the plant section. (c) Placing a cover slip over the plant section.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN14
The diagram below represents a certain plant.
​(a) What is the likely habitat for the plant?
(b) Give two reasons for your answer in (a) above.
answers
​(a) Dry/Arid/Semi-arid/Desert;
(b) Succulent/ fleshy stem; reduced leaves/leaves reduced into thorns/leaves modified into spines/spikes;
K.C.S.E Biology Q & A - MODEL 2011PP1QN13
State two functions of carbohydrates in the human body.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN12
The diagram below represents a certain organism.
​State the phylum and class to which it belongs.
Phylum Class
answers
​Chordata; . Aves; .
K.C.S.E Biology Q & A - MODEL 2011PP1QN11
State the functions of the following parts of a light microscope.
(a)Fine adjustment knob. Stage.
answers
(a)Moves the body tube through smaller distances to bring the image/specimen/object into sharper focus;
(b)Platform where specimen (on slide) is placed;
K.C.S.E Biology Q & A - MODEL 2011PP1QN10
Name the site of anaerobic respiration in a cell.
answer
K.C.S.E Biology Q & A - MODEL 2011PP1QN10
Give two differences in the products of anaerobic respiration between plants and animals.
answers
(i) Lactic acid in animals while in plants it is ethanol/alcohol;
(ii) No carbon IV oxide produced in anaerobic respiration in animals while anaerobic respiration in plants produces carbon IV oxide; K.C.S.E Biology Q & A - MODEL 2011PP1QN09
The diagrams below illustrate the organs of some flowering plants.
​State the classes of plants to which each belong.
A B
answers
​(a) Dicotyledonae;
(b) Monocotyledonae;
K.C.S.E Biology Q & A - MODEL 2011PP1QN08
State three characteristics of the class crustacea.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN07
The diagrams below show an experimental set-up to investigate a certain process in a plant tissue.
Explain the results obtained after 30 minutes.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN06
What is meant by the following terms?
(a) Ecology. (b) Carrying capacity.
answers
​(a) This is the study of the inter-relationship between organisms and their environment;
(b) The maximum population of a species than a particular habitat can support; without depletion of resources. |
Archives
December 2024
Categories
All
TOPICSFORM 1
Form 2
Form 3
Form 4
|
We Would Love to Have You Visit Soon! |
Hours24 HR Service
|
Telephone0728 450425
|
|
8-4-4 materialsLevels
Subjects
|
cbc materialsE.C.D.E
Lower Primary
Upper Primary
Lower Secondary
Upper Secondary
|
teacher support
Other Blogs
|