Carbohydrates, Biology

Assignment Help:

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.


Related Discussions:- Carbohydrates

Determine energy density of human milk, Determine Energy Density of Human M...

Determine Energy Density of Human Milk? The energy density of human milk depends on the relative proportions of protein, fat and the principal carbohydrate, lactose. Lactose co

Regulation of pyruvate kinase, Regulation of pyruvate kinase, pyruvate carb...

Regulation of pyruvate kinase, pyruvate carboxylase and PEP carboxykinase A) In liver,  pyruvate  kinase  is inhibited  by high levels  of ATP and alanine  so which  glycolysis

Medication for cardiac patients, Medication The patient is advised to ...

Medication The patient is advised to continue antibiotics for a week more after discharge. Other medications prescribed are analgesics (acetaminopen), cough syrup, diuretics

Sample titration for estimation of vitamin c in lemon juice, Define Sample ...

Define Sample Titration for Estimation of Vitamin c in Lemon Juice? Cut the lemon into two halves with a stainless steel knife. Remove the seeds. Squeeze the juice from half a

Main parts into which a neuron can be divided, Q. What are the three main p...

Q. What are the three main parts into which a neuron can be divided? What are their respective functions? The three mains parts into which a neuron can be didactically divided

Acute glomerulonephritis - disorder of glomerulus, Acute Glomerulonephritis...

Acute Glomerulonephritis   If you review the anatomy of urinary system you will recall that nephron is the working unit of kidney and its number  exists  in millions. Within  t

Define methods of estimation of ascorbic acid (vitamin c), Define Methods o...

Define Methods of Estimation of Ascorbic Acid (Vitamin C)? Ascorbic acid is also known as vitamin C which is a water soluble vitamin. As you already know, vitamins are a group

Dna replication in bacteria, The DNA replication is a biological procedure ...

The DNA replication is a biological procedure which happens in all living organisms and copies their DNA; it is the basis for biological inheritance. The process will starts when o

Diagram, #questioi want clarius diagramn..

#questioi want clarius diagramn..

How to promote physical activity to combat from obesity, How to Promote Phy...

How to Promote Physical Activity to combat from Obesity? For many children, low physical activity rather than excessive energy intake is the primary culprit. Management of obes

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd