PLANT PHYSIOLOGY
RESPIRATION IN PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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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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Detailed explanation-1: -Countries in the European Union use kilojoules on their labels, the joules are the standard measurement of energy. However, the use of calories over joules on American food labels is simply a preference–think of it as the energy equivalent of using “miles” instead of “kilometers."
Detailed explanation-2: -The calorie content is often given in kcals, which is short for kilocalories, and also in kJ, which is short for kilojoules. A kilocalorie is another word for what’s commonly called a calorie, so 1, 000 calories will be written as 1, 000kcals. Kilojoules are the metric measurement of calories.
Detailed explanation-3: -1 Calorie/kcal = 4.2 kilojoules A calorie is the unit of energy. Calorie or kilocalorie is the unit of energy = 1000 calories. Joule is the unit of energy. Kilojoule is the unit of energy = 1000 joules.
Detailed explanation-4: -The energy values are 17 kJ/g (4.0 kcal/g) for protein, 37 kJ/g (9.0 kcal/g) for fat and 17 kJ/g (4.0 kcal/g) for carbohydrates.