Biochemistry Help » Identifying Biochemical Molecules » Identifying Monomers and also Dimers » Identifying Disaccharides
Explanation:

Recheck out the particular kinds of monosaccharides and also glycosidic bonds that are connected in these disaccharides. Remember that disaccharides are created upon dehydration synthesis of 2 monosaccharides.

You are watching: Which of the following substances is a disaccharide?

Maltose is created of two glucose monomers with an 

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1-4 link.

Cellobiose is created of 2 glucose monomers with a 

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1-4 affiliation.

Succlimbed is composed of one glucose monomer and one fructose monomer with an 

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1-2 affiliation.

Lactose is written of one galactose monomer and also one glucose monomer through a 

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1-4 link.


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Example Inquiry #1 : Identifying Disaccharides


Maltose is a disaccharide written of which two monosaccharides?


Possible Answers:

Glucose + glucose


Glucose + galactose


Galactose + galactose


Glucose + fructose


Fructose + fructose


Correct answer:

Glucose + glucose


Explanation:

Maltose, which is made up of two glucose monomers joined by an alpha-1,4 affiliation, is the correct answer. On the other hand also, lactose is made up of one glucose monomer and also one galactose monomer, and sucincreased is comprised of one glucose monomer and also one fructose monomer. 


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Example Inquiry #3 : Identifying Disaccharides


Which of the adhering to substances are found in fructose?


Possible Answers:

Glucose


Galactose


Lactose


Namong these are discovered in fructose


Correct answer:

Namong these are uncovered in fructose


Explanation:

Fructose is a monosaccharide; therefore, it is just comprised of one kind of carbohydprice. Disaccharides are comprised of two types of monosaccharides. For instance, lactose is comprised of galactose and glucose whereas succlimbed is consisted of of glucose and fructose. Polysaccharides are comprised of multiple devices of monosaccaharides.


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Example Question #1 : Identifying Disaccharides


Lactose intolerance is a very widespread disorder, which involves a decrease in the feature of the enzyme lactase. Which of the following have to be avoided in a patient via lactose intolerance?


Possible Answers:

Both have to be avoided


Neither demands to be avoided


Glucose


Galactose


Correct answer:

Neither requirements to be avoided


Explanation:

Lactose is a disaccharide that demands to be damaged dvery own to its monosaccharide components in the gut (so that it can be absorbed). Lactose is comprised of galactose and glucose monosaccharide devices. An enzyme called lactase, found on the intestinal walls, is offered to break dvery own lactose to galactose and also glucose. A person via lactose intolerance lacks lactase and, therefore, cannot break down lactose to its components. This leads to malabsorption of lactose. However, tbelow is no trouble through galactose and glucose absorption. This indicates that a patient through lactose intolerance have the right to still digest galactose and also glucose if provided individually.


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Example Question #1 : Identifying Disaccharides


Hypoglycemia is a disorder that signifies low levels of glucose in the blood. In some cases of hypoglycemia, glucose levels can be lugged ago to normal via intake of sugars. What sugar(s) deserve to be administered to a patient through hypoglycemia?

I. Lactose

II. Galactose

III. Sucrose


Possible Answers:

I only


II only


I and also II


I and also III


Correct answer:

I and also III


Explanation:

As the question says, hypoglycemia is defined by low levels of glucose in the blood. To bring the glucose levels earlier to normal, one can ingest foods that contain high amounts of glucose. To solve this question we must decide which of the stated options have the right to be broken down to glucose. Lactose is a disaccharide that is made up of glucose and also galactose. An enzyme, dubbed lactase, breaks dvery own lactose to its components, which deserve to then be soaked up by the intestinal cells; therefore, ingesting glucose will certainly boost glucose levels in the blood. Similarly, sucincreased is a disaccharide consisted of of fructose and also glucose; therefore, ingesting sucincreased will also increase glucose levels in the blood.

Galactose is a monosaccharide and, therefore, cannot be broken down to any kind of additionally. It is took in as galactose by the intestinal cells. This will not boost the concentration of glucose in the blood.


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Example Concern #1 : Identifying Disaccharides


Which reducing sugar(s) is/are created from two glucose molecules connected by a 1 to 4 linkage?


Possible Answers:

Maltose


Sucrose


Cellobiose


More than among these


Lactose


Correct answer:

More than among these


Explanation:

Maltose, made from the breakdvery own of starch, has a 1 to 4 alpha link, and cellobiose, made from the breakdvery own of cellulose, includes a 1 to 4 beta link. Both are disaccharides with various shapes and different properties.


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Example Inquiry #51 : Identifying Monomers And Dimers


Which of the following sugars is created of glucose and also galactose?


Possible Answers:

Sucrose


Fructose


Xylose


Maltose


Lactose


Correct answer:

Lactose


Explanation:

To answer this question, we"ll should have some background information on each of the sugars shown in the answer choices.

A glycosidic bond between glucose and also galactose will develop the disaccharide lactose, which is hence the correct answer.

Sucrose is a disaccharide created of glucose and also fructose. Maltose is additionally a disaccharide composed of 2 glucose molecules. Moreover, fructose and also xyshed are monosaccharides.


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