Questions tagged [sugar]

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1answer
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Why is neutralizing important when carrying out the Benedict test?

When testing for non-reducing sugars, acid is added, then the solution is boiled, then it is neutralized, benedict solution is added and then it is boiled again. Why is neutralizing the solution ...
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19 views

Does Invertase catalyse the hydrolysis of other sugars other than sucrose?

I recently did a lab where we tested out the substrate specificity of Invertase on different types of sugars such as sugar alcohols and disaccharides, measured by the absorbance of red using a ...
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1answer
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Biochemistry - Plastic eating microbes at home [closed]

Is it possible for me to locate, without too much difficulty, and culture, at home, a bacteria (like yeast) on plastic? I tried a similar process with yeast and I was able to culture it on extremely ...
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40 views

Why are disaccharides less reducing than monosaccharides?

My teacher told me the statement, but if both monosaccharide and disaccharides have a single free active group, how is this possible?
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43 views

How much ribose do we eat?

I am wondering how much ribose we ingest as food? (Deoxy)Ribose is found in the backbone of DNA and RNA. So, we eat ribose as part of the nucleic acid found in plant and animal foods. While protein, ...
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2answers
255 views

Can plants break down cellulose for energy?

I know humans and other animals start using their own proteins as food when starving. This made me wonder if a plant that is deprived of sunlight, after using up its sugar reserves and other carbs, ...
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0answers
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Ants and their love for sweet and sugar [duplicate]

I have observed many times that ants are able to reach the box where sweet items are kept even if the box is kept in secret. How do they identify it??
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2answers
149 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 ...
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1answer
100 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 ?
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1answer
1k 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.
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1answer
2k 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 (...
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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 ...
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2answers
3k 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?
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1answer
20 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 ...
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1answer
58 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 ...
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1answer
632 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 ...
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0answers
79 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 ...
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2answers
152 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 ...
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1answer
101 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 ...
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1answer
563 views

Why doesn't sugar spoil?

Sugar contains a lot of easily accessible chemical energy. Why seemingly nothing likes to grow on it?
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1answer
342 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 ...
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4answers
1k 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 ...
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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 ...
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1answer
108 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 ...
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1answer
21k 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 ...
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3answers
979 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 ...
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1answer
664 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?
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1answer
175 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. ...
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1answer
149 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-...
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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 ...
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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 ...