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12

Let's compare ATP, glucose and fatty acids in terms of energy storage. ATP has a molecular weight of 507 Da Glucose has a molecular weight of 180 Da, and contains the same amount of energy as 31 ATP molecules Fatty acids vary in size, but a gram of fat contains about twice as much energy as a gram of glucose (or glycogen) The difference in energy ...


6

I was musing on this and did some strange googling, and have some ballpark figures for a bunch of different organisms. It's far from a complete answer but it's at least a start, and all this won't fit in a comment. DNA replication, I assumed, was a huge metabolic drain on the cell. Turns out that is far from the case. Many helicases are passive, requiring ...


6

They don't eat little. Consider the volume of milk / food they consume as a ratio of their weight. Quite the contrary they are ravenous machines and their consumption is much higher than an average adult. All cellular energy comes from the hydrolysis of ATP, and the production of ATP comes from the breakdown of glucose. The glucose comes from a sugar found ...


5

I think @AlanBoyd and @MadScientist have touched on the answer, fat is better suited by density for storing energy than ATP; ATP is optimal for quick conversion to bioenergy. Look at the question in another way: ATP in bioenergy cycle is dynamic - its an energy flux from food and breath to bioenergy. Biological energy is used at essentially the same rate ...


4

Not a complete answer, but a few random thoughts to start off the conversation: 1) There is another molecule that is used as a fast access store, and that is phosphocreatine which can be used to very rapidly rephosphorylate ADP in muscle. In resting muscle it is present at about 5x the level of ATP. 2) Levels of ATP are also used by cells as a regulatory ...


4

This is a common phenomena which most of us come across. Seeing flashes of light, stars and other shapes in the eyes occur when the body goes through stressful activities. For example while you are climbing the blood flow will be more to other prominent parts like hands and lower waist so brain and eyes will get less supply of blood as well as nutrients. ...


3

I suspect that what you are actually looking for is the following: - 1 gram of fat = 9 kcal - 1 gram of protein = 4 kcal - 1 gram of sugar = 4 kcal - 1 gram of alcohol = 7 kcal Those are general and inexact values. They're just often used to give a rough idea of the amount of energy we get from different types of food.


3

Would the body use this transferred fat for as energy, or would it ignore it as it wasn't stored there in the first place? It would use it as energy source, there is no such thing as "ignored tissue". Fatty acid mobilization is regulated by epinephrine and insulin. These are hormones which are ofc. carried by blood, so every white adipose (fat) tissue ...


3

Viruses hijack the hosts translational machinery, forcing the host to downregulate translation of other proteins in favor of viral proteins. Your cells will eventually lyse, but in the meantime they would not be producing the enzymes required to make whatever product it is you're trying to get, likely resulting in low yields that are contaminated with virus. ...


3

Just to add to the answer from @buzrw: Using data from here and here I have estimated recommended calorie intake per kg for a 2 yr old and for an adult. I've used figures for males and assumed 70 kg for the adult weight which is the "international standard man": toddler: 120 Cal kg-1 adult: 40 Cal kg-1 So yes, the energy intake of toddlers is ...


3

Maybe this is easiest understood comparing to our current rate of CO2 consumption to the possible industrial CO2 absorption rate. Human non biological CO2 production is 29 Gtons. A little more than four tons of carbon per human being each year. The natural carbon cycle on the planet through CO2 is otherwise about 788 Gtons. Is it possible to grow ...


3

I think the poster wants only a simple answer, so I am going to answer in simple terms. The fates can be - 1 Used in cellular respiration as fuel and some amount can be converted to useful energy which can be used to build other substances and some energy can be lost as heat. 2.The animal can become prey for other animal. 3.The animal throws away some ...


2

Gains heat; humans are not particularly well-adapted to make use of heat as an energy source. In a simple matter, if something you eat is hot when it goes in then the average temperature of the body has increased. More relevantly (and to get this more on-topic for biology), eating anything will generally increase your body temperature, as in order to ...


2

During ATP production through the citric acid cycle, some ATP is used to transport necessary molecules for the reactions. piruvate molecules are actively transported into the mitochondrial matrix [2] two NADH equivalents from glycolisis are transported into the mitochondrion and consume two molar equivalents ATP [1] protons leakage across the mitochondrial ...


2

Calories and dollars are the most obvious and straightforward, but including additional variables complicates the accounting. . A great paper that used energy has been updated in a more recent publication. Emergy is an interesting alternative. Current work includes the Natural Captial project that "aims to integrate the values of nature into all major ...


2

I'm pretty sure this doesn't exist. If it did, that would be awesome. The following is 100% pure speculation with nothing to back this up at all (as a disclaimer). Phosphorus-31 (the stable isotope) is NMR active, which means that you could theoretically use an MRI machine to visualize phosphorus. A quick google search shows scientists attempting to use ...


2

I had to re-read your last sentence a few times to make sure I understood it correctly, but I think that now I do, and I can answer your question. What you're talking about are thermophiles. They're small organisms that love hot conditions - up to nearly 250 degrees Fahrenheit. They can be found places with a lot of hot water, such as hot springs - and, ...


2

You can break down the energy expenditure of the human body in terms of the different organs which use it up: this is done in this biochemistry book for instance, http://www.ncbi.nlm.nih.gov/books/NBK22436/ You can also look at the detailed expenditure of each cell: although the amounts will vary according to cell type (neuron vs. muscle cell, say!), the ...


1

Disclaimer: Not my field but I'm doing my best. We often measure the calories consumed indirectly by measuring the quantity of oxygen consumed. As we have a reserve of ATP(ATP is a molecule, a stock of ATP is some kind of battery of our body) in our body, at very short term the oxygen consumption is not necessarily perfectly correlated with energy use but ...


1

A significant amount of heat generated by the cell does not come from the hydrolysis of an NTP. ATP is generated by a H+ gradient in the mitochondria, and this gradient is created by mechanisms which rely only in part by ATP. Most of the energy stores in our bodies are not in the NTP pool. This is why CO₂ and urine are used to measure energy expenditure ...


1

A virus has to infect the cell, take over the cell machinery to make more virus, and then is might lyse the cell. And then you have to wait for more virus to do that again to more cells, and you have to keep the algae alive all that time. Chemical or mechanical shearing would be much faster, and you don't have to run the risk of virus floating around and ...


1

Your task is to determine how light intensity and wavelength affect ATP production. Therefore, we know for sure that your dependent variable (or response variable) should be ATP production. It is customary to depict the response variable on the vertical axis (Y-axis), so let's trying doing this. Now we need to sort the other two variables. I suggest that ...


1

Adipocytes use glucose as an energy source. They express the insulin-responsive glucose transporter GLUT4 just like muscle cells so that when blood glucose levels rise they are primed to take the glucose up for fatty acid biosynthesis, but they also use glucose as a fuel molecule.


1

Maybe this video might help you: Matter and Energy in Organisms


1

My answer is limited to sheep. Background The metabolites referred to as ketone bodies (which I will refer to as ketones from now on) are acetoacetate and β-hydroxybutyrate. In humans these are produced in the liver when the amount of acetoacetyl CoA being produced exceeds the capacity of the TCA cycle. These acetyl groups are instead used to produce ...



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