UACE BIOLOGY 2013 PAPER 1 QUESTIONS AND ANSWERS

This Quiz provides you with the 40 objective question of paper 1 UACE 2013 with their Answer which are well explained at the end of the Quiz.

Answer all questions

1. The oxygen dissociation curves for aquatic animals are usually to the left of those of terrestrial ones because

 

Question 1 of 40

2. Staying in a dark room for a long time increases the sensitivity of the eye to light because photochemical pigments are

 

Question 2 of 40

3. Which one of the following is correct about organisms in an ecosystem?

 

 

Question 3 of 40

4. Figure 1 shows a glandular tissue.

Fig 1

 

In which part of the mammalian body is the tissue likely to be?

ileum

lungs

stomach

skin

Question 4 of 40

5. Which one of the following changes in a cell would increase its water potential?

 

Question 5 of 40

6. Sprinters usually take off at an angle rather than in upright position in order to increase

 

Question 6 of 40

7. Table 1 shows the effect of temperature on the rates of apparent photosynthesis and respiration in a plant

The temperature in (°C), at which the plant is least, efficient photosynthetically is
Temperature (0C)71015192228
Rate of apparent photosynthesis (mgCO2g-1h-1)1.32.32.83.12.82.5
Rate of respiration (mgCO2g-1h-1)0.30.60.71.21.82.1
The temperature in (°C), at which the plant is least, efficient photosynthetically is

 

Question 7 of 40

8. The hormone which enables plants to respond to drought is

Question 8 of 40

9. Figure 2 represents a longitudinal section through part of a striated muscle fibre.

i bandFig.2

Which one of the following pairs of structures shorten when the muscle fibre contracts?

 

Question 9 of 40

10. Which one of the following would occur to a plant requiring at least 14 hours of dark
period daily in order to flower?

 

Question 10 of 40

11. Sickle Cell anemia is caused by a double re­cessive gene and sufferers usually die before maturity. The continued existence of the sickle cell allele among the human population demonstrates.

 

Question 11 of 40

12. Which one of the following consists of  tissues specialized for support?

 

Question 12 of 40

13. When same response is given to same stimulus on different occasions, the behavior is said to be

 

Question 13 of 40

14. Which one of the following statements on reproduction is true?

 

Question 14 of 40

15. C3 plants are less efficient than C4 plants fixing carbon dioxide at low carbon dioxide and high oxygen partial pressures because

 

Question 15 of 40

16. Which one of the following is the significance of etiolation in plants?

 

Question 16 of 40

17. Which one of the following methods of estimating population has the highest chances of    error?

 

Question 17 of 40

18. Which one of the following is the correct state of structures in the mammalian eye during accommodation for far objects?
 Ciliary muscleSuspensory ligmentLens curvature
A.relaxedtautdecreased
BContractedtautincreased
C.relaxedrelaxeddecreased
D.Contractedrelaxedincreased

Question 18 of 40

19. Which one of the following is the respiratory surface for a mammalian fetus?

Question 19 of 40

20. Which one of the following is the correct order of vents in the heart after the contraction of the atria?

 

Question 20 of 40

21. Which one of the following features characterizes the omnivore gut?

 

Question 21 of 40

22. High concentration of carbon dioxide in the tissues leads to

 

Question 22 of 40

23. Which one of the following environmental factors has a direct effect on all organisms?

 

 

Question 23 of 40

24. Which one of the following factors reduces interspecific competition in a community?

 

Question 24 of 40

25. Figure 3 shows an earthworm in a stationary position.

For the earthworm to progress in the direction indicated by the arrow, in region X, the earthworm has to contract its

 

Question 25 of 40

26. Albinism in corn plants is due to a double recessive gene which causes them to die be­fore maturity. The trait however continues to appear in new generations because

 

 

Question 26 of 40

27. Which one of the following may cause adaptive radiation to a variety of species?

 

Question 27 of 40

28. The following are adaptations for survival among animals during periods of water shortage.

(i) Tolerance to water loss,

(ii) Biochemical production of water,

(iii) Reduction in water loss,

(iv) Evasion of hot environment.

Which one of the following is a correct set used by the camel?

 

Question 28 of 40

29. The equation for complete oxidation of a sub­strate is

2C18H34O2 + 51O2    →    36CO2 + 34H2O

The respiratory quotient for the oxidation is

 

Question 29 of 40

30. A likely effect of inhibiting the action of; cholinesterase at a synapse is

 

Question 30 of 40

31. Which one of the following processes does not affects the biochemical oxygen demand in an environment?

 

Question 31 of 40

32. At which one of the following stages of division does a cell have the same nucleic content as that at metaphase I?

 

Question 32 of 40

33. When a lipid is combined with a phosphate group, it becomes

 

Question 33 of 40

34. Which of the following animal groups body segments and closed circulatory tern?

 

Question 34 of 40

35. Which one of the following occurs in a mam­mal when its thermoregulatory centre detects a lower temperature of blood than normal?

 

Question 35 of 40

36. Which one of the following may occur to a community of organisms as a result of natural Section?

 

Question 36 of 40

37. Which one of the following parts of the nephron contributes to the production of hypertonic urine?

 

Question 37 of 40

38. An occurrence of a phenotypic ratio 3:1 in a dihybrid cross is an indication of

 

Question 38 of 40

39. Which one of the following is not exhibited by a well-adapted parasite?

 

Question 39 of 40

40. Which one of the following is not a requirement for the working of a physiological homeostatic mechanism?

 

Question 40 of 40

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