Biology Test 3 General Science Aptitude
Biology Test 3 General Science Aptitude
Question 1
Which one of the following would give the highest energy per gram?
Fats give the highest energy per gram because they yield about 9.3 Kcal/g, while carbohydrates and proteins yield only about 4.1 Kcal/g.
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Question 2
Which one of the following units represents the largest amount of energy?
Among the listed units, 1 Calorie (kilocalorie) = 4184 Joules, which is larger than erg and electron volt.
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Question 3
A woman's voice is shriller than a man's due to_____?
A woman’s voice is shriller because it has a higher frequency compared to a man’s voice.
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Question 4
Which gas is used in the preparation of soft drinks?
Carbon dioxide is used in carbonated soft drinks to create fizz and preserve freshness.
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Question 5
Why are soft drinks made with chilled water rather than water at room temperature?
Chilled water attracts and dissolves more carbon dioxide, maintaining the fizz better than water at room temperature.
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Question 6
Coke is made by heating coal in the absence of air at_____?
Coke is prepared by destructive distillation of coal at about 1300 °C in the absence of air.
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Question 7
In blood, the percentage of water is_____?
Plasma in human blood contains about 90% water, which maintains fluidity and supports transport functions.
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Question 8
As the temperature of ice rises, the ice melts and its density_____?
When ice melts, water forms, and its density increases until 4 °C, after which it decreases again.
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Question 9
Water is a universal solvent for what reactions?
Water is called the universal solvent, especially for biochemical reactions, because it dissolves a wide range of substances.
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Question 10
The volume percentage of nitrogen in air is_____?
Nitrogen makes up about 78% of Earth’s atmosphere by volume.
