Questions tagged [sugar]

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21
votes
3answers
6k views

Why are sugars in whole fruits not digested the same way sugars in juice are?

In this paper of the WHO, it is claimed that we should limit our consumption of free sugars: WHO recommends a reduced intake of free sugars throughout the lifecourse. [...] Free sugars include ...
14
votes
1answer
19k views

Why is ATP produced in photosynthesis used to synthesize glucose?

In photosynthesis ATP is produced in light-dependent reactions only to go to the Calvin cycle to be turned into glucose to make ATP during respiration: Why isn't this ATP just directly released into ...
7
votes
1answer
102 views

Why is sugar absorbed very fast into the blood stream?

Recently, I heard from a pregnant person I know that immediately after she eats something sugary/sweet, the baby starts kicking and moving around, as if reacting to the sugar. She told me (...
5
votes
1answer
225 views

Is plasma membrane permeable to sucrose

I searched a lot in the net but don't found a clear answer. I just want to know if plasma membrane is permeable to sucrose.
4
votes
4answers
976 views

Sugars which are Carbohydrates and vice-versa?

Is it right that are all sugars are carbohydrates but not all carbohydrates are sugars? If so, which carbohydrates are sugars and which aren't and why all sugars are carbohydrates? If I had to ...
3
votes
1answer
421 views

Why doesn't sugar spoil?

Sugar contains a lot of easily accessible chemical energy. Why seemingly nothing likes to grow on it?
3
votes
1answer
2k views

Is Sugar a stimulatant or a weak sedative?

Quite often, I have heard the remark that children become hyperactive when high amounts of sugar are consumed. But common websites suggest that sugar is a sedative, and the hyperactivity in children ...
3
votes
1answer
610 views

What happens when we eat excess fat?

The fats in our body are stored in fat cells. When we over eat fats does the size of our fat cells increase, are more fat cells generated, or do we "throw out" excess fat?
3
votes
1answer
101 views

Can non-carbonated energy drinks boost alcohol intoxication?

I just read news article about banning caffeine in alcohol drinks and about that energy drinks increase the urge to drink alcohol. Energy drinks cause sugar intoxication - answer about it here in ...
2
votes
1answer
92 views

Does the body prioritise the use of available sugar before fat?

Let's say you eat a very unhealthy snack that contains 90% sugar and 10% fat. Would somatic cells not start using the fat for energy until all the sugar is used up? Does the body not use fat at all ...
2
votes
2answers
118 views

Why are sugars like mannose expressed on the outside of eukaryotic cell membranes?

Bacteria are able to adhere to sugars (e.g. mannose) on the exterior of eukaryotic cells, leading to infection and disease. Why have eukaryotes not evolved so as to dispense with sugars on their cell ...
1
vote
1answer
51 views

Can fructose take multiple forms ? Which of these structures of fructose is correct?

When I look up the structure of fructose I get various different structures Which of them is correct ? Are these all just isomers of fructose ?
1
vote
1answer
57 views

Why and how does falsifying sensory information work? [closed]

Some context, before the question: Whenever I have a craving to binge on something sugary, I just prepare a cup of extremely bitter green tea (with 3 bags of tea) and I imagine myself binging on ...
1
vote
1answer
1k views

What would kill you first water or cola? [closed]

After discussing this with some colleagues, I devised the theory that you could drink more coca-cola in a single sitting than you could water, without killing you. Defining the volume it would take ...
1
vote
1answer
215 views

Carbohydrate in egg white

I looked up online to find which type of carbohydrate is found in egg white, but the only information I found is the quantity of sugar. I would like to know the exact name of the carbohydrate found in ...
1
vote
3answers
799 views

How is sugar in fruit metabolized, or digested and used?

I thought before, in general, when we have sugar in our food, then the sugar goes in our bloodstream, and if there is too much sugar, then insulin is secreted by our pancreas, and the sugar is pushed ...
1
vote
1answer
89 views

What advantage does lactose have as the main sugar in milk?

Most organisms have lactose as their main sugar in their milk. What advantage does lactose give have over sucrose (Which is a common sugar in the plants, so it makes sense for it to be present in ...
1
vote
1answer
124 views

What controls Fructose regulation in plants?

Sugars are found ubiquitously in plants and are regulated. For sucrose it's pretty straightforward - it's basically kept at a low ish level, and put into storage or other intermediate compounds. ...
1
vote
0answers
76 views

Simplest known form of aerobic glycolysis

What is the simplest known way that an organism performs aerobic glycolysis? In other words, what is the simplest known way known to convert glucose into $\ce{H2O}$ and $\ce{CO2}$, other than by ...
0
votes
2answers
279 views

Is sugar absorbed into the bloodstream through the walls of the mouth?

If you let a piece of candy melt in your mouth, but did not swallow it, would the sugar be absorbed through the walls of your mouth?
0
votes
1answer
81 views

Does the sun light have to have *direct access* to fruits to make them sweet?

I understand that sun light is needed for fruits to ripen. In the years with less sun light, the fruits are usually not so sweet. So the sun light is needed to make the fruits sweet. Where and how ...
0
votes
1answer
95 views

Is fructose really a poison like alcohol? [closed]

I came across this video claiming that fructose is like a poison with detailed explanation on how it is metabolized. With a search on internet I found an article which challenges the claim and sounds ...
0
votes
1answer
130 views

Does applying sugar to the tongue taste buds releave sugar withdrawal symptoms?

I found several online articles discussing sugar withdrawal symptoms that people experience after cutting back on large sugar intake. http://healthyeating.sfgate.com/refined-sugar-withdrawal-symptoms-...
0
votes
0answers
16 views

Recommendation for daily intake of natural sugars

There multiple articles/topics raised on the internet about the free/added sugars in the human diet as for example WHO recommendation on page 16, but at the same time not that much about the naturally ...
0
votes
1answer
16 views

What is the meaning of a 1,4 bond between sugars? [closed]

I don't know how to express my question. I want to know what are bonds like 1.4 bond between molecules. I've read somewhere like the amylase enzyme can break 1.4 bond. I want to know what are these ...