TREE PHYSIOLOGY
RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Kcal or kJ are commonly used units for energy released during respiration. Which of the following statement about these units is not true?
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1 cal is equal to 4.178J
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1 J is equal to 0.24 cal
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686 cal is about 2870 kJ
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Now a days J is being replaced by cal as unit of energy released in respiration
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Explanation:
Detailed explanation-1: -Food energy is measured in kilocalories (kcals), commonly referred to as calories. Although technically incorrect, this terminology is so familiar that it will be used throughout this course. A kilocalorie is the amount of energy needed to raise 1 kilogram of water 1 degree Celsius.
Detailed explanation-2: -One kilocalorie (1 kcal or 1000 calories) is the amount of heat (energy) needed to raise the temperature of one kg of water by one degree Celsius (°C). The SI standard unit for energy is Joule (J). One kcal is approximately 4.18. Another unit is the Btu (British thermal unit).
There is 1 question to complete.