BECE 1991 Integrated Science Past Questions and Answers
The BECE 1991 Integrated Science paper has 35 objective and 4 theory questions. Here are sample objective questions with the correct answers and explanations. Sit the full paper with the real time limit on ePrep.
Sample questions with answers
1. The digestion of carbohydrates starts in the
- A. mouth
- B. throat
- C. stomach
- D. duodenum
Answer: A. mouth
Answer: A. Starch digestion begins in the mouth with salivary amylase.
Answer: A. Starch digestion begins in the mouth with salivary amylase.
2. Photosynthesis in plants requires chlorophyll, sunlight, water and
- A. oxygen
- B. carbon dioxide
- C. steam
- D. hydrogen
Answer: B. carbon dioxide
Answer: B. Photosynthesis also needs carbon dioxide.
Answer: B. Photosynthesis also needs carbon dioxide.
3. Which of the following objects is a good conductor of heat?
- A. Wood
- B. Rubber
- C. Copper
- D. Plastic
Answer: C. Copper
Answer: C. Copper is a good conductor of heat.
Answer: C. Copper is a good conductor of heat.
4. What is the work done when a force of 2.5 N moves through a distance of 4 m?
- A. 0.6 J
- B. 1.5 J
- C. 1.6 J
- D. 6.5 J
- E. 10.0 J
Answer: E. 10.0 J
Work done = Force x Distance
Force = 2.5 N
2.5 = $\frac{25}{10}$
Distance = 4 m
Work done = 2.5 x 4 = $\frac{25}{10}$ x 4 = 10 J
Note:
1. 2 divides 4, 2 times and 10, 5 times
2. 5 divides itself 1 time and 25, 5 times
3. 5 x 2 = 10
4. The unit of work done is Joule (J)
Alternatively
2.5 = 2.⌒5. = 25 x 10$^{-1}$
2.5 x 4 = 25 x 10$^{-1}$ x 4
2.5 x 4 = 25 x 4 x 10$^{-1}$
2.5 x 4 = 100 x 10$^{-1}$
100 = 10 x 10 = 10$^{1 + 1}$ = 10$^{2}$
2.5 x 4 = 10$^{2}$ x 10$^{-1}$
Law of multiplication of indices
a$^{m}$ x a$^{n}$ = a$^{m + m}$
2.5 x 4 = 10$^{2 + -1}$
2.5 x 4 = 10$^{2 - 1}$
2.5 x 4 = 10$^{1}$
Any number raised to the power 1 is the same number.
2.5 x 4 = 10
Work done = Force x Distance
Force = 2.5 N
2.5 = $\frac{25}{10}$
Distance = 4 m
Work done = 2.5 x 4 = $\frac{25}{10}$ x 4 = 10 J
Note:
1. 2 divides 4, 2 times and 10, 5 times
2. 5 divides itself 1 time and 25, 5 times
3. 5 x 2 = 10
4. The unit of work done is Joule (J)
Alternatively
2.5 = 2.⌒5. = 25 x 10$^{-1}$
2.5 x 4 = 25 x 10$^{-1}$ x 4
2.5 x 4 = 25 x 4 x 10$^{-1}$
2.5 x 4 = 100 x 10$^{-1}$
100 = 10 x 10 = 10$^{1 + 1}$ = 10$^{2}$
2.5 x 4 = 10$^{2}$ x 10$^{-1}$
Law of multiplication of indices
a$^{m}$ x a$^{n}$ = a$^{m + m}$
2.5 x 4 = 10$^{2 + -1}$
2.5 x 4 = 10$^{2 - 1}$
2.5 x 4 = 10$^{1}$
Any number raised to the power 1 is the same number.
2.5 x 4 = 10
5. The person who studies the weather is
- A. a pilot
- B. a physician
- C. an astronaut
- D. an astrologer
- E. a meteorologist
Answer: E. a meteorologist
Answer: E. A person who studies the weather is a meteorologist.
Answer: E. A person who studies the weather is a meteorologist.
6. A child suffering from Kwashiorkor lacks
- A. protein
- B. fats and oils
- C. vitamins
- D. mineral salts
Answer and explanation: practise this paper on ePrep.
7. Which of the following substances can dissolve almost all solutes?
- A. Kerosene
- B. Palm oil
- C. Water
- D. Turpentine
Answer and explanation: practise this paper on ePrep.
8. All of the following methods are used to preserve food in our homes except
- A. smoking
- B. salting
- C. boiling
- D. canning
Answer and explanation: practise this paper on ePrep.
9. The chemical symbol for potassium is
- A. Fe
- B. K
- C. P
- D. Pb
Answer and explanation: practise this paper on ePrep.
10. The part of the banana plant used in reproduction is called
- A. sucker
- B. rhizome
- C. stem
- D. tuber
Answer and explanation: practise this paper on ePrep.
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