Which of the following are instant sources of energy in living organisms, like glucose? Their general formula is:
Correct answer: C. Cx(H2O)y
- A. Cx(H2O)x
- B. C6H12O6
- C. Cx(H2O)y
- D. Cx(HO)y
- E. Cx(H2O2)y
Explanation
Carbohydrates are the instant sources of energy in living organisms. The general carbohydrate formula is Cx(H2O)y, where x and y are integers. This formula represents that carbohydrates are composed of carbon, hydrogen, and oxygen in a ratio of 1:2:1. Glucose, which has the formula C6H12O6, is an example of carbohydrate and is a primary energy source for the body's cells.
This question appeared on the NUMS 2019 (cancelled sitting) paper, which you can sit online with every answer explained.
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Carbohydrates are organic compounds classified as monosaccharides, disaccharides and polysaccharides according to their structure and hydrolysis products. The topic covers glycosidic bonds, glucose and fructose, sucrose, lactose and maltose, starch, glycogen and cellulose, along with their roles in energy storage, structural support and food tests.
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