PRESIDENT’S OFFICE
REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT
DODOMA REGION
FORM TWO MOCK EXAMINATION MAY 2021
BIOLOGY
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CODE: 033
TIME:2:30 HOUR
INSTRUCTIONS
1. This paper consists of sections A,B, and C
2. Answer all questions in section A and B and ONLY one question from section C
3. Write your index number on every page of this sheet on the space provided
4. All writing should be in blue or black pen, except for drawings which should be in pencil
SECTION “A” (30 Marks)
1. Choose the letter of the most correct answer among the given alternatives and write its letter in the box provided
(i). In a microscope, if the eyepiece reads X 10 and the objective lens reads x40. The total magnification is ;
(A) 400 times (B) 10 times (C) 40 times (D) 100 times
(ii).An animal cell differ from plant cell in that;
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(A) Has no nucleus (B) Has no cell wall (C) Has no cytoplasm (D) Has chloroplast
(iii). Unexpected event resulting from carelessness, unawareness and ignorance is
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(A) Bad lack (B) Electric shock (C) Safety (D) Accident
(iv). Which of the following organisms matches correctly with the disease it causes
(A) Trypanasomiasis- typhoid (B) Mosquito – Malaria (C) Schistosomes- sleeping sickness
(D) Plasmodium – malaria
(v). the best evidence that two organisms belong to the same species is that;
(A) Can breed with other organisms which are not of their kind
(B) Live in the same habitat and have similar ways of nutrients
(C) Produce fertile offspring when interbreed;
(D)They are similar in appearance
(vi).Absorption of food takes place in the ;
(A) Stomach (B) Liver (C) Small intestine (D) Large instestine
(vii) First Aid is referred to as;
(A) Emergency care given to patient after medical treatment
(B) A small box in which medical facilities are stored
(C) An immediate care given to a patient before doctors help
(D) All that can do healthy people before doctor assistance
(viii)_______________is used to describe the people’s body ability to resist diseases
(A) Health (B) Hygiene (C) Good manner (D) Immunity.
(ix). An artery carries blood
(A) Toward the heart (B) Away from the heart (C) Away from the lungs (D) Toward the lungs
(x). The blood group ‘O’ is called universal donor because;
(A) Has antibody A (B) Has antibody B (C) Receives blood from all groups (D) Donates blood to all groups
2. For each items (i) __(x) write TRUE if the statement correct and FALSE if the statement is not correct
(i).Artificial classification is based on few observable features…………………………………..
(ii). Air, water, and soil are examples of abiotic components of the environment………………………..
(iii). Fermentation is a form of aerobic respiration in plants………………………………………………………
(iv). Lack of roughage in diet cause constipation……………………………………………………………………….
(v) Some laboratory accidents can be avoided by reading warning signs on the chemical containers
(vi). A good mannered person will always great others…………………………………………
(vii). All bacteria are harmful…………………………………………..
(viii).Air sacs for gaseous exchange in mammals is alveoli……………………………………..
(ix). Obesity is the form of Nutritional disorders………………………………………………………..
(x). Peptides are end products of proteins……………………………………………….
3. Match the items in list A with that in List B given below;
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LIST ‘A’ |
LIST ‘B’ |
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i. A device for accurate observation of microorganism in the laboratory ………………………. ii. An organic substance that speeds up metabolic activities………………….. iii. Ability of the body to resist a particular infection……………………….. iv. Result from lack of vitamin ‘C’………….. v. Classification based on few observable characteristics……………….. vi. Obtain their nutrients from dead and rotten organic matter……………….. vii. Non living part of an ecosystem……………. viii. Site for photosynthesis……………………. ix. Rolls food into bolus………………………. x. Green yellow juice secreted by the liver…………………………… |
A. Microphone B. Microscope C. Enzymes D. Plague E. Immunity F. Vaccination G. Bile H. Scurvy I. Goiter J. Natural classification K. Artificial classification L. Saprophytes M. Parasites N. Biotic part O. Abiotic part P. Chloroplast Q. Tongue R. Teeth. |
PROPOSED MARKING SCHEME OF BIOLOGY
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1.
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i |
ii |
iii |
iv |
v |
vi |
vii |
viii |
ix |
x |
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A |
B |
D |
D |
C |
C |
C |
D |
B |
D |
1 mark@ =10
2.
|
i |
ii |
iii |
iv |
v |
vi |
vii |
viii |
ix |
x |
|
True |
True |
False |
True |
True |
True |
False |
True |
True |
False |
1 mark@= 10
3.
|
i |
ii |
iii |
iv |
v |
vi |
vii |
viii |
ix |
x |
|
B |
C |
E |
H |
K |
L |
O |
P |
Q |
G |
1mark@=10
SECTION ‘B’
4(a) Biology is the scientific study of life and living things (01)
And
Biologist is a person who deals the study of living things ( 01 mark)
(b) (i).Botany( 01mark)
(ii).Zoology (01mark)
4.(c) (i) Through knowledge of biology production of crops and livestock can be improved. For example through genetic engineering, scientists have developed breads of crops and animals that produce high yield and mature quickly (01½ marks)
(ii) The study of anatomy helps doctors to learn the structure of the body and how it functions which makes it possible for doctors to know when something is wrong in the body and how it can be treated (01½ marks)
5.(a)(i) Ferns have leaves called fronds which are coiled in bud such leaves bear spore producing structure
(ii) Alteration of generation is shown with sporophyte being the dominant generation
(iii).The gametophyte is a small, simple prothalus( flattened leaf like structure)
(iv) The sporophyte has true roots, stem and leaves
(v) The sporophytes has vascular tissue ( xylem and phloem)
(v) The leave bear spore producing structure called sori.
1 Mark @ any 4.
(b) DIAGRAM OF FERN PLANT
Heading =1mark, labelling 03 marks, neatness= 01 mark , drawing =01 marks
6.(a)(i) It produces food for plants and animal
(ii). It produce oxygen needed by all living organism for respiration.
(iii). It reduces carbon dioxide in the atmosphere because it is harmful if excessive amount accumulated in the atmosphere
(iv). It converts light energy from the Sun into chemical energy used by plants and animal
01 marks @ any three
(b) (i) Light intensity
(ii) Carbon dioxide
(iii) Temperature
(iv) Water
(v) Storage in the stems
(vi) Leaf age
(Vii)Oxygen content.
01 mark @ any four.
7.(a) (i)Cell is the basic unit of life (01 mark)
(ii) Zoology is the branch of biology which deals with the study of animal, (01 mark)
(iii) First Aid is the immediate assistance given to a sick or an injured person before getting professional medical help (0 1 mark )
(b).(i) Liniment- is used to reduce muscle pain (1mark )
(ii) Pain killers- used to reduce or relieve pain (1mark)
(iii)Cotton wool-Used t clean and dry wound (1mark)
(iv). Sterile gauze – covering wounds to protect them from dirty and germs (1mark)
(c) Unicellular organisms are organisms which consists of only one cell. Example amoeba while multicellular organisms are organisms which consists of more than one cell. Example human being (3marks)
8.(a) Natural environment consists of all living and non-living factors which occur naturally on the earth (01 mark)
(b)(i) Producers
(ii) Primary consumers
(iii) Secondary consumers
(iv) Tertiary consumers
(v) Quaternary consumers
(v) Decomposers
(1 mark @=6)
(c) (i) Light , water, rocks , soil (1mark any 1)
(ii) Plants, animals, microorganisms (1mark any 1)
9. (a) Puberty is the period where children become sexually mature (01 marks)
(b) Requirement for person hygiene
(i) Listen to advice from other people
(ii) Acquire the items needed to help yourself and your environment to be clean and how to use them.
(iii) washing your body every day
(iv) Always wear clean clothes
(v) Wash your hands with soap and clean water after going to the toilet and before you eat
(vI) Brush your teeth at least twice a day
(vi) Keep your environment clean.
(01mark @ any 4)
(c) Ways of maintaining personal hygiene during puberty
(i) Take bath at least twice a day
(ii) Girls should wear sanitary towels during menstruation and change them after . Wash your hand with soap and water after handling soil sanitary towel
(iii) Wear clean clothes and wash undergarment with clean water and soap every time you take shower
(iv) Boys should keep their beard well-trimmed or shaved
(v) use good quality soap and deodorant if possible as the body produce more sweat (2 marks )
SECTION ‘C’
10(a) Food preservation is the process that involves special methods of food processing that are used to prevent food from getting spoiled or going bad.(02 mark)
· (b Introduction
-Meaning of food preservation (01½ Mark)
· Main body – Traditional method
- Smoking
- Drying in the sun
- Curing
- Cooking
- fermentation
( @ point =1mark and 1½ mark explanation)
-Modern method
- Pasteurizing
- Refrigeration
-Freezing
-Canning and bottling
Additives
Liquefaction
Irradiation
( @ point 1 mark and explanation 1½)
Conclusion (Relevant explanation- 1½mark)
11. –Introduction –0 2marks (keywords disease that spread rapidly)
- Main body – Cholera is caused by bacteria called vibrio cholerae (02 marks)
- Cholera is transmitted/ spread through contaminated food and water (04 marks)
- Symptoms of cholera are; diarrhea, vomiting, weight loss, wrinkled skin, muscle cramp ( 10 marks)
Conclusion ( Relevant explanation – 2marks)
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