Carbohydrates, Biology

Carbohydrates

Fifty five to seventy per cent of the required energy in animals is derived from carbohydrates. However, fats and proteins can also be broken down and used for supplying energy. In most animals this happens only when the dietary intake of carbohydrates is low. In contrast, Drosophila uses only carbohydrates as a source of energy for its flight muscles and when the supply is exhausted the insect cannot fly even though it uses stored fat for other metabolic processes. Whereas, locusts are known to use only lipids for their long migratory flights. Most animals, however, use a variety of hexose sugars like glucose, fructose, mannose, and galactose as interchangeable sources of energy.

In this way no particular carbohydrate is really considered essential in a way similar to amino acids. But even if no carbohydrate is considered essential, growth of certain animals will be better on one type of sugar than on another. This can be explained better by the results of the following experiment. Young locusts showed that when dietary sugar was maltose growth was maximum or optimum and growth was minimum when no carbohydrate was given. Other sugars supported sub-optimal growth. What could be the reason for this difference? One of the main causes is the difference in the rate of movement of sugars across the gut wall into the blood. From the above experiment we can conclude that certain insects have a preference for a certain carbohydrate which can be called an essential or preferred nutrient. In the above experiment with locusts, maltose was the preferred nutrient.

Posted Date: 1/15/2013 4:04:57 AM | Location : United States







Related Discussions:- Carbohydrates, Assignment Help, Ask Question on Carbohydrates, Get Answer, Expert's Help, Carbohydrates Discussions

Write discussion on Carbohydrates
Your posts are moderated
Related Questions
Provides one dimensional ("ice pick") view of the heart only provides information with respect to the distance of each object from the transducer and no information in the l

What is Erythropoietin (EPO)   A.  is secreted by peritubular interstitial cells of the kidney cortex.   B.  acts by increasing the production of red blood cells by cells in

Define Interaction of pyridoxine with Ascorbic acid and Leucine? Ascorbic acid: Vitamin B 6 metabolism increases with. Higher levels of vitamin C intake. Whole blood a

Define Regulation of Water Balance - Hormonal Control of Fluid Balance? Hormonal control of fluid balance: When water intake is insufficient or water loss is excessive, the kid

Drawbacks of Fats and Sweets in diabetics Diabetics should eat less fats and sweets. Fats found in burger, cheese and butter etc. should especially be avoided. Even when  a pat

CRITICISM OF DARWINISM - Arriva l of the fittest: Darwinism explains the survival of the fittest but was unable to account for the arrival of the fittest. V estigia

What is critical photoperiod? And How can the critical photoperiod relate to flowering be experimentally determined? Critical photoperiod is the limit of the photoperiod durati

Are protozoans presenting contractile, or pulsatile, vacuoles easily found in fresh or in salt water? Fresh water is the less concentrated of solutes than sea water and it (fre

Explain the Bunsen Burner? It is a type of gas burner that gives very hot flame by allowing air to enter at the base and mix with the gas. It is used - (a) For sterilizing i

Explain the Methodology for seliwanoff test? Take 5 ml of seliwanoff's reagent in a test tube. Add 5-6 drops of the glucose solution and heat the mixture to boiling for about 3