8/8/2019 BIOL553p1

1/10

NAME _________________________________ INDEX No. ___________________SIGNATURE: _______________________________

553/1BIOLOGY

(THEORY)PAPER1

July/August 20102 hours

Uganda Certificate of Education

JOINT MOCK EXAMINATIONS 2010BIOLOGY THEORY

Paper 1

2hours 30 minutes

INSTRUCTIONS TO CANDIDATES:

Answer all questions in sections A and B plus two questions in section C.

Answers to section A should be written in the boxes.

Answers to section B should be written in the spaces provided.

Answers to section C should be written on answer booklets provided.

For Examiners useonly

Section/questions Marks

A: 1 30

B: 31

32

33

C: 34

35

36

37

TOTAL

8/8/2019 BIOL553p1

2/10

Turn over2010 jmeb

SECTION A

1. The maize fruit is an example of

A. Schizocarp B. Berry C. Cayopsis D. Drupe

2. The chromosome number in the liver cells is 22, the number in thegametes will beA. 22 B. 44 C. 23 D. 11

3. Which of the following is not a plant organ?A. Phloem vessel B. Tap root C. flower D. foliage leaf

4. A form of learning in which an unrelated or irrelevant stimulus

produces a response originally associated with an appropriatestimulus is referred to asA. Reflex action B. SynapseC. Conditioned reflex D. Voluntary action

5. Which of the following pairs form the vascular bundlesA. Cambium and cortex B. Xylem vessel and cambiumC. Phloem and xylem D. Phloem and cortex

6. An organism has the following features(i) long coiled poboscis

(ii) two pairs of scale wings(iii) a pair of knobbed/ clubbed antennae

The organism belongs to orderA. Isoptera B. Orthoptera C. Lepidoptera D. Hymenoptera

7. A crocus flower opening its petal on a warm dry day is an example ofa

A. Nastic movement B. Tactic movementC. Reflex action D. Tropic movement

8. Which of the following is an endocnne glandA. Pancreas B. Salivary gland C. Gastric gland D. Sweatgland

9. Colour blindness is caused by a recessive gene and is sex linked. Itoccurs mainly in males. If a colour blind male marries a carrierfemale, what will the percentage of colour blind daughters among thechildrenA. 0 B. 25 C. 50 D. 75

10. Which of the following structures of amoeba is responsible for feeding

A. Food vacuole B. Contractile vacuoleC. Pseudopodia D. Cell membrane

2

8/8/2019 BIOL553p1

3/10

11. Which of the following sugars is not reducingA. Maltose B. Fructose C. Galactose D. Sucrose

12. Which of the following nutrient are important in the formation ofchlorophyll

A. Potassium and sulphur B. Nitrogen and magnesiumC. Calcium and phosphorous D. Zinc and copper

13. The guard cells differ from epidermal cells in that it

A. Has a cell vacuole B. Has chloroplastsC. Lacks a nucleus D. Has holes

14. Which of the parts below on a microscope controls the amount oflight entering itA. Mirror B. eye piece C. condenser D. Diaphragm

15. S4 student carried out an experimental to determine the percentage

of water in the soil sample and the results are as belowMass of crucible = 40gMass of soil = 80gMass of crucible plus soil after heating to red hot =90g

What was the percentage of water in the soil samples?A. 50% B. 37.5% C. 44.4% D. 88.8%

16. After a period of study, a student observed that two organisms R andM lived together in a loose relationship; M surviving on R while R wasnot affected in any way by the presence or absence of M. The type ofrelationship is termed asA. Parasitism B. Symbiosis C. commensalism D. Saprophytism

17. The following is a dental formula of a certain animal

I3

3

2

2

1

1

2

2MPMCI . Which of the following is NOT true about the

animalA. It feeds on vegetation aloneB. It is manC. It feeds on both flesh and vegetationD. Its dentition is described as heterodont

18. The figure1 below shows a certain stage of cell division

The stage of cell division in the above isA. interphase B. telophase C. anaphase D. metaphase

19. Lymphocytes effect immunity byA. engulfing foreign bodiesB. releasing antibodiesC. production of antigen

3

8/8/2019 BIOL553p1

4/10

D. coagulation of foreign bodies

20. Global warming is a result ofA. Increased oxygen in the atmosphereB. Increased carbondioxide in the atmosphereC. Increased nitrogen in the atmosphereD. the sun moving near the earth

21. The kind of joint occurring between the femur and tibia of a man is

A. Ball and socket B. Fixed jointC. Umbilical cord D. Spinal cord

22. Which of the following attaches the foetus to the mothers uterusA. placenta B. foetal membraneC. umbilical cord D. Spinal cord

23. By what process does free nitrogen in the atmosphere convert to

nitrates directlyA. Nitrification B. Lightening C. Absorption D. Nitrogen

fixation

24. During anaerobic respiration in plant cells the break down of glucoseProduces

A. alcohol and water B. water carbondioxideC. alcohol and carbonoxide D. carbondioxide and lactic acid

25. Which one of the following is formed from nitrogen compounds by the

liver?

A. Urine B. Nitrates C. Amino acids D. Urea

26. Which one of the following digestive juices does not contain

enzymes?

A. Bile juice B. Pancreatic juice C. Saliva D.Intestinal juice.

27. In figure 2 below cell X belongs to

A. Cortex B. Pericycle C. Endodermis D. Piliferous layer

28. The best method of studying distribution of butterflies in a flowergarden is by using

4

8/8/2019 BIOL553p1

5/10

A. quadrateB. capture mark recapture methodC. line transectD. direct counting

29. The figure 3 below shows energy flow though different feeding levelsin an ecosystem.

Producers primary consumers secondary consumerstertiaryConsumer

From the above, which of the following is not correct

A. All consumers depend on primary producers for energyB. Energy flow is in one directionC. Producers depends on tertiary consumers for energyD. During energy flow, there is eating and being eaten.

30. In which of the following tissue does mitosis occurA. Cambium B. Pith C. Phloem D. Xylem

SECTION B: (answer all questions)

31. Science students in S4 carried out an experiment in the laboratoryand came up with the following results

Table of results:.

SubstrateConcentration (mg)

50 100 200 300 - 500 - 635

Time inseconds

30 - 65 85 105 12.5 145 155

Rate ofreaction 17 2.2 - - 3.8 - - 41

(a) (i) Complete the table above. (3mks)(ii) Using the information in the table above, construct a graph to

show therate of reaction in relation to substrate concentrate.

(6mks)

(b) (i) What is the relationship between the rate of reaction andsubstrate

concentration shown in the graph?

(2mks)

5

8/8/2019 BIOL553p1

6/10

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

....................................................

(ii) What is the effect of continued increased substrate

concentration onenzyme activity?

...............................................................................................................

...............................................................................................................

...............................................................................................................

....................... (1mk)

(iii) Explain your results from the graph above in relation to

enzyme activity.

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

................................................................

...............................................................................................................

...............................................................................................................

.............. (3mks)

(c) Using the graph state the rate of reaction of the followingsubstrate

concentrations:(i)

150gm............................................................................................

(ii)450gm...........................................................................................

(2mks)

(d) Apart from the factor being investigated above, mention anyother four

factors which affects enzyme activity.

(i) .....................................................................................................

6

8/8/2019 BIOL553p1

7/10

(ii) ............................................................................................

........

(iii) ............................................................................................

........

(iv) ...................................................................................................

(2mks)

32. The figure 4 below shows an experimental set up to investigate thepresence of one of the soil components.

fresh soil heated soilin muslin in muslinbag bag

lime water

P Q

(a) (i) What soil component is being investigated?

..........................................................................................................(1mk)

(ii) State the use of lime water in the experiment

...........................................................................................................................................................................................................................

.(1mk)

(b) (i) State what will be observed in each of the set ups:

P...................................................................................................

.....................................................................................................

........................

Q...................................................................................................

.....................................................................................................

........................

(ii) What was the importance of heating the soil for 2hours in set

up Q?

.....................................................................................................

.....................................................................................................

.............. (1mk)

7

8/8/2019 BIOL553p1

8/10

(c) State any 3 roles played by the soil component being investigatedin the

experiment in the soil.

(i)..................................................................................................

......... ....................................................................................

..........................

(ii).................................................................................................

......

.....................................................................................................

.....

(iii)................................................................................................

.....................................................................................................

........................

(d) Name any 2 other components apart from the one under

investigation

(i)..................................................................................................

............

(ii).............................................................................................................

33. The figure 5 is part of a fore limb of a mammalian skeleton.

(a) Name the parts labeled 1 to 4 .

(2mks)

1) ...........................................................................................

2) ...........................................................................................

3) ...........................................................................................

4) ...........................................................................................

8

8/8/2019 BIOL553p1

9/10

(b) Name the types of joints at

(1mk)

(i)

A ..............................................................................................

(ii)

B ..............................................................................................

(c) Name the muscle labeled (1mk)

(i)

Y.................................................................................................

(ii)

Z................................................................................................

(d) Explain how muscles Y and Z work

(6mks)

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............

SECTION C:Attempt anytwoquestions

34. (a) Define the term Homeostasis? (1mk)(b) Describe how blood sugar level is regulated in the body(6mks)(c) Describe how the liver in man regulates

(i) Amino acids (3mks)(ii) Body temperature (3mks)

(d) State any other substances stored by the liver.(2mks)

35. (a) State the adaptations of tape worms to their mode of life.(5mks)

(b) Describe the life cycle of a beef tape worm (Teania seginata).(7mks)(c) State the problems faced by tape worm when in the intestines

9

8/8/2019 BIOL553p1

10/10

of man.(3mks)

36. (a) Define photosynthesis? (1mk)(b) Write a summarized equation for photosynthesis.(1mk)(c) Describe an experiment to show that light is necessary for

Photosynthesis.(8mks)

(d) State the factors that affect photosynthesis.(2mks)(e) Give three importances of photosynthesis in nature.(3mks)

37. (a) Define the terms below(i) allele (1mk)(ii) test cross

(1mk)(iii) sex linked character

(1mk)

(b) (i) State three examples of sex linked characters you know.(1mks)

(ii) Using illustrations, describe how sex is determined in human.(4mks)

(c) In humans, albinism is controlled by a recessive allele a.Marriage

between a man with a normal skin colour and an albino wiferesulted

into offspring who are all carriers.

(i) Give the genotypes of the man, his wife and their off springs.(1mks)

(iii) Work out the result of marriage between their daughter and acarrier

Male.(5mks)

END.

10