Name: …………………………………………………..
Index No………………………
Signature:……………………………………………… School:…………………………………..
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Biology practical
Paper 3
July/August 2019
BUGANDA EXAMINATIONS COUNCIL MOCKS
Uganda Certificate of Education
BIOLOGY PRACTICAL
PAPER 3
2HOURS
INSTRUCTIONS TO CANDIDATES
o Answer all questions in the spaces provided.
o All drawings must be made in the spaces provided.
o Drawings should be made with a sharp pencil.
NO. MARKS SIGNATURE
1
2
3
TOTAL
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1. You are provided with solution B and C.
(a) Carryout the test on solution B in table 1 below to establish the chemical nature of
solution B.
Table 1 (8½marks)
TEST OBSERVATION CONCLUSION
To 1cm3 of solution B add
2 drops of iodine solution
To 1cm3 of solution B add
1cm3 of Benedict’s
solution and boil.
To 2cm3 of solution B add
1cm3 of sodium
hydroxide solution
followed by 2 drops of
copper II sulphate.
(b) Obtain 3 test tubes, label them 1, 2, 3. Pour 2cm3 of solution B to all test tubes then
to;
Test tube 1 add 2cm3 of solution C
Test tube 2 add 1cm3 of solution C
Test tube 3 add 0.5cm3 of solution C
Incubate all test tubes at 35 – 40oC for five minutes. Carryout Benedict’s test on all
test tubes.
Record your observation and conclusion in the table II below.
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Table II (08marks)
Benedict’s test Test tube Observation Conclusion
To 1cm3 of solution add 1
1cm3 of Benedict’s and
boil.
(c)(i) With a reason identify the nature of solution C. (02marks)
Reason: …………………………………………………………………………………………………………………
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(ii) Suggest an explanation for the difference in the conclusion made between test tubes
1 and 3. (02marks)
Test tube 1: …………………………………………………………………………………………………………...
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Test tube 3: …………………………………………………………………………………………………………..
…………………………………………………………………………………………………………………………….
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2. You are provided with specimens G and H.
(a) With reason identify the organ of the plant the specimens represent. (03marks)
Organ
……………………………………………………………………………………………………………………………...
Reason
……………………………………………………………………………………………………………………………...
……………………………………………………………………………………………………………………………...
Examine the specimens and outline differences between the two specimens.
(04marks)
Part of plant G H
Corolla
Calyx
Androecium
Gynoecium
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(c) From the structure of the pistil and stamens suggest the type of pollination which is
more likely to occur in specimen H. Explain your answer. (03marks)
……………………………………………………………………………………………………………………………...
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(d) Describe how specimen G is adopted to its agent of pollination. (03marks)
Agent : …………………………………………………………………………………………………………………..
Adaptation: …………………………………………………………………………………………………………..
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(e) Describe the epicalyx of specimen G. (02marks)
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(f) Cut specimen H longitudinally.
Draw and label one half of the pistil of specimen H. (05marks)
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3. You are provided with specimens Q and T which belong to the same class.
(a) Giving three reasons, state the class of specimen T. (04marks)
Class: ……………………………………………………………………………………………………………………
Reason: ………………………………………………………………………………………………………………..
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(b) Using a hand lens, observe specimen T. State how the structure of the abdomen of
specimen T is suited to the habitat of the specimen. (04marks)
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(c) Observe the thorax of both specimens and state three structural differences
between the specimens? (03marks)
Specimen Q Specimen T
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(d) From your observation of specimen T, state features which make the specimen a
good vector. (02marks)
……………………………………………………………………………………………………………………………..
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(e) In the space below, draw and label the abdomen of specimen T from the ventral
view. State the magnification of the drawing. (7marks)
END
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