KALPOHIN SENIOR HIGH SCHOOL
Name …………………………
MOCK 2020
Index Number ……………………
BIOLOGY 2&1
Essay & Objective
2 ½ Hours
KALPOHIN SENIOR HIGH SCHOOL
MOCK EXAMINATION
BIOLOGY 2&1 2½ hours
Do not open this booklet until you are told to do so. While you are waiting, read the following
instructions carefully.
Write your name and index number in ink in the spaces provided at the top right hand corner of
this booklet.
This booklet consists of two papers. Answer Paper 2 which comes first, in your answer booklet and
Paper 1 in your objective Test answer sheet. Paper 2 will last for 1 hour 40 minutes after which the
answer booklet will be collected. Do not start Paper 1 until you are told to do so. Paper 1 will last
for 50 minutes
KALPOHIN SENIOR HIGH SCHOOL
MOCK EXAMINATION (2020)
Biology 2 and 1 2½ hours
Paper 2 essay (70 marks)
Answer three questions in all; two questions from section A and the only compulsory question in
section B
Large labeled diagrams should be used where they make an answer clearer. The names given for
chosen species must be English or scientific and not vernacular
Credit will be given for clarity of expression and orderly presentation of answers
Section A
Answer two questions only from this section
1) (a) Show how the structures of each of the following cells relate to their functions
(i) Sperm cell (3 marks)
(ii) Red blood cell (3 marks)
(iii) Leaf palisade cell (3 marks)
(iv) Nerve cell (3 marks)
(b) Outline the main events during meiotic division in organisms (diagrams are not required).
(8 marks)
2. (a) (i) what is an organelle? (1 mark)
(ii) List two organelles found in plant cell that are responsible for excretion of metabolic waste
(3 marks)
(b) (i) What is meant by the term homeostasis? (1 mark)
(ii) Mention two examples of the process in man (2 marks)
(iii) In a tabular form, state three differences between excretion in flowering plants and
excretion in human (3 marks)
(c) (i) What are lipids? (1 marks)
(ii) State four functions of lipids in humans (4 marks)
(iii) Describe the digestion and absorption of lipids in humans (6 marks)
3. (a) (i) What do you understand by a sex-linked character? (1 marks)
(ii) Explain why sex-linked characters are exhibited less frequently in female (3 marks)
(iii) Explain the difference between sex-linkage and autosomal linkage (2 marks)
(b) (i) What is recombinant DNA technology? (2 marks)
(ii) State four applications of recombinant DNA technology (4 marks)
(c) A man whose blood group is heterozygous B is married to a woman whose blood group is
heterozygous A. with the aid of a genetic diagram, determine the possible blood groups of their
children (8 marks)
4. (a) How does the structure of a leaf adapt it to its photosynthetic function (8 marks)
(b) (i) In a tabular form, state four differences between a dicotyledonous stem and a
monocotyledonous root (4 marks)
(ii) State four ways in which photosynthesis is of importance to human (4 marks)
(c) (i) Name the biological phenomenon used to describe loss of water from plants when
transpiration is impossible (1 mark)
(ii) State three conditions under which the phenomenon named in c (i) above occurs
(3 marks)
Section B
Answer all the questions in this section
5 (a) (i) State five precautions that should be considered when using a light microscope
(5 marks)
(ii) State four reasons for classifying organisms (4 marks)
(b) (i) Describe conjugation in Rhizopus (6 marks)
(ii) Explain the nutritional method adopted by rhizopus in order to benefit from photosynthesis
(4 marks)
(c) (i) what is conservation? (1 mark)
(ii) Outline three activities of man which affect the concentration of oxygen in the atmosphere
(3 marks)
(d) (i) What is BOD as used in water treatment? (2 marks)
(ii) Give two relevance of BOD in the treatment of water (2 marks)
(e) Sate three likely effects of the mortality rate being higher than the birth rate within a community
(3 marks)
Paper 1 objective test (50 marks)
Answer all the questions
Each question is followed by four options lettered A to D. find the correct option for each question
and shade in pencil on your answer sheet, the answer space which bears the same letter as the option
you have chosen. Give only one answer to each question.
1. Which of the following statements about a control experiment is correct? It
A. does not have the factor to be tested
B. has the factor to tested
C. it is not necessary in scientific investigation
D. gives the investigator a lesser degree of confidence
2. Fine protoplasmic strands linking the protoplasm of adjacent cells are
A. pith membranes B. tyloses
C. plasmodesmeta D. middle lamellae
3. Which of the following processes involve osmosis?
A. movement of water through the xylem
B. loss of water vapour form the stomata
C. translocation of food through the phloem
D. absorption of water from the soil by the root
4. The body symmetry of an organism can be described as
A. a section that runs through the length of the entire or part of the organism
B. a section that passes cross-wise through the entire length or part of the organism
C. how a body can be divided into two or more equal parts
D. when an organism is said to have been sectioned
5. Which of the following parts of an organism is a tissue?
A. blood of a mammal B. flower of a plant
C. leaf of a plant D. motor neurone of a mammal
6. Which of the following parts of a cell may be seriously damaged if the cell cannot release
energy?
A. Golgi apparatus B. Endoplasmic reticulum
C. Mitochondrion D. Ribosome
7. Which of the following plant cells can differentiate into other cell types?
A. collenchyma B. chlorenchyma C. parenchyma D. sclerenchyma
8. Which of the following cell inclusions can destroy other cell organelles?
A. centriole B. ribosome C. lysosome D. mitochondrion
9. The substance found in the cell membrane of an animal is
A. nucleotide B. lipid C. carbohydrate D. cellulose
10. Which of the following pairs of organisms belong to the same phylum?
A. Hydra sp. and Paramecium B. Cray fish and Jelly fish
C. Tapeworm and Earthworm D. Ascaris sp. and Onchoerca sp
11. Club mosses belong to the division
A. Bryophyte B. Lycopodophyta C. Spermatophyte D. Pteridophyta
12. Which of the following fungi does not normally form hyphae?
A. yeast B. Rhizopus C. mucor D. toad stool
13. The class hepatica and the class musci belong to the major division
A. Filicinophyta B. Lycopodophyta C. Bryophyte D. Chlorophyta
14. Which of the following characteristics is observed in arachnids only?
A. joined appendages B. segmented body
C. chitinous exoskeleton D. four pairs of walking legs
15. Bacterium is a cell which does not possess
A. cell wall B. cell membrane
C. nuclear materials D. nuclear membrane
16. A dichotomous key is used to
A. classify organisms B. name organisms
C. locate organisms D. identify organisms
17. A protoctist with flagella belong to the phylum
A. Apicomplexa B. Ciliophora C. Rhizopoda D. Zoomastigina
18. Which of the following arthropods possesses two pairs of antennae?
A. cockroach B. cray fish C. millipede D. spider
19. A cold-blooded vertebrate which spend part of its life-cycle in water and part on land but
return to water to reproduce belong to class
A. Reptilia B. Mammalia C. Amphibia D. Pisces
20. The presence of mesogloea and cnidoblasts are features of
A. annelids B. coelenterates C. flatworms D. roundworms
21. The excretory products in protozoans is
A. amino acid B. uric acid C. ammonia D. urea
22. The term acoelomate refers to an organism with
A. body cavity B. no body cavity
C. two body layers D. three body layers
23. The major mineral present in the shell of molluscs is
A. calcium B. iron C. sodium D. copper
24. Alternation of generation occurs in
A. Euglena B. Rhizopus C. Crotalaria D. Funaria
25. The biological importance of the dance by the worker honey bee is that, it
A. serves as a means of identifying members of the caste
B. signals the availability of food
C. serves as a warning signal
D. acts as a signal for mating
26. In order to conserve water, a xerophyte may have all the following characteristics except
A. sunken stomata B. waxy leaf surfaces
C. broad leaf surfaces D. thick cuticle
27. What structure enhances the survival of white mangrove in waterlogged soil?
A. stilt roots B. lateral roots C. prop roots D. breathing roots
28. The rate of water uptake in plants is measured with
A. hydrometer B. hygrometer C. photometer D. an aspirator
29. Striving for limited resources and space by large number of organism results in
A. emigration B. competition C. speciation D. succession
30. Etiolation in flowering plants is caused by
A. absence of auxins B. absence of light
C. low temperature D. high relative humidity
31. Air sacs primarily enable birds to
A. take off smoothly B. alter their altitude during flight
C. have an efficient respiratory system D. store expired air
32. Buttress roots are common features of trees of the
A. guinea savanna B. mangrove C. rainforest D. coastal savanna
33. Which of the following organisms constitute a pioneer community?
A. ferns B. fungi C. lichens D. mosses
34. The type of algae involved in nitrogen fixation are
A. blue-green algae B. green algae C. brown algae D. red algae
35. Some plants trap and digest insects because the
A. insects interrupt their activities
B. plants require insect’s blood for fruiting
C. plants require nitrogen supplements
D. insects should not be allowed to compete with the plants
36. The by-product of bacterial action in the soil may include the production of all the following
except
A. gaseous oxygen B. hydrogen sulphide
C. heat energy D. carbon dioxide
37. Lime is added to soil to
A. increase the acidity B. decrease the acidity
C. precipitate other minerals D. impoverish the soil
38. The conversion of ammonium salts into nitrate is called
A. nitrification B. fixation C. denitrification D. putrefaction
39. Which of the following is a deficiency disease?
A. poliomyelitis B. dysentery C. scurvy D. cholera
40. Which of the following is an effect of drug abuse?
A. increase in the body weight B. early cure of diseases
C. becoming addicted D. gaining self confidence
41. The importance of immunization in children is to
A. destroy pathogens in the body
B. increase the production of white blood cells
C. stimulate the production of antibodies
D. stimulate the production of antigens
42. Which of the following substances is known to deplete the ozone layer?
A. carbon dioxide B. carbon monoxide
C. chlorofluorocarbons D. sulphur dioxide
43. Which of the following natural resources cannot be conserved?
A. soil B. water C. wildlife D. air
44. Which of the following is a feature of mitotic metaphase?
A. homologous chromosomes pair up
B. nuclear membrane is visible
C. crossing over occurs
D. chromatids arrange themselves on the equator
45. The part of the monocot plant call the ligule is the
A. sheath blade junction of the leaf B. margin of the leaf
C. hollow stem of the internodes D. prop roots at the base of the stem
46. A rhizome is regarded as modified shoot because it
A. is elongated B. possesses adventitious roots
C. possesses vascular bundles D. possesses nodes and internodes
47. Which of the following factors affect the rate of photosynthesis?
I. light intensity II. Moisture content of the atmosphere
III. Atmosphere pressure IV. Temperature
A. I and II only B. I and IV only C. II and III only D. II and IV only
48. In plants, the element that is required for nuclear division is
A. calcium B. nitrogen C. phosphorous D. sulphur
49. Excretory products in plants responsible for the decolouration of flowers are called
A. resins B. anthocyanins C. tannins D. alkaloids
50. In carvinores, the least developed teeth are the
A. canine B. incisors C. molars D. premolars
