Question

Carbohydrates, more commonly known as sugars, are made up of carbon, oxygen, and hydrogen atoms. The smallest unit of a carbohydrate is a monosaccharide. Two monosaccharides make up a disaccharide, and many monosaccharides make up a polysaccharide. Disaccharides and polysaccharides can be hydrolyzed back into the individual monosaccharide units. Part A Select the statement that is incorrect. Select the statement that is incorrect. Complex sugars are carbohydrates. All carbohydrates have the general formula Cn(H2O)n. Simple sugars are carbohydrates. Carbohydrates contain only carbon, oxygen, and hydrogen atoms. SubmitHintsMy AnswersGive UpReview Part Part B Complete the following sentences about carbohydrates. Match the words in the left-hand column with the appropriate blank in the sentences in the right-hand column. HelpReset disaccharide polysaccharide carbohydrate monosaccharide 1. A carbohydrate that yields many monosaccharides when hydrolyzed is a . 2. A simple sugar is composed of equal parts carbon and water, which gave rise to the general name of any sugar as a . 3. Lactose, the sugar in milk, is a , because it can be split into two monosaccharides. 4. A cannot be hydrolyzed any further.

Answer 1

Answer:

PART A.

The false statement is All carbohydrates have the general formula Cn(H2O)n.

PART B.

1. A carbohydrate that yields many monosaccharides when hydrolyzed is a polysaccharide.

2. A simple sugar is composed of equal parts carbon and water, which gave rise to the general name of any sugar as a carbohydrate.

3. Lactose, the sugar in milk, is a disaccharide , because it can be split into two monosaccharides.

4. A monosaccharide cannot be hydrolyzed any further

Explanation:

The general formula Cn(H2O)n is only for monosaccharides, not for all the carbohydrates.

Answer 2

PART A

Carbohydrates are compounds that are made up of carbon, hydrogen and oxygen only. Carbohydrates can be divided into 3 broad groups namely; monosaccharides, disaccharides and polysaccharides. While monosaccharides and disaccharides are referred to as simple sugars, polysaccharides are referred to as complex sugars. From the preceding explanation, one can deduce that both simple and complex sugars are carbohydrates.

Monosaccharides have the general formula Cₙ(H₂O)ₙ, for example glucose, C₆H₁₂O. Disaccharides however have a different general formula because it is one water molecule short of the combination of two monosaccharides. And can thus be represented as Cₓ(H₂O)y. For example, sucrose has the formula C₁₂H₂₂O₁₁.

One can see from the above that not all carbohydrates have the general formula, Cₙ(H₂O)ₙ.

Thus the incorrect statement/the answer is "All carbohydrates have the general formula Cₙ(H₂O)ₙ".

PART B

1. A carbohydrate that yields many monosaccharides when hydrolyzed is a Polysaccharide. This is because a monosaccharide cannot be hydrolyzed any further. A disaccharide can however be hydrolyzed into two monosaccharides only. But a polysaccharide can be hydrolyzed into more than two monosaccharides.

2. A simple sugar is composed of equal parts carbon and water, which gave rise to the general name of any sugar as a Carbohydrate. As explained earlier (in Part A), simple sugars can either be a monosaccharide or disaccharide. Generally, all carbohydrates contain at least one monosaccharide and since they will also contain just carbon, hydrogen and oxygen, then are all referred to as carbohydrates also.

3. Lactose, the sugar in milk, is a disaccharide, because it can be split into two monosaccharides. A disaccharide contains two monosaccharide units and can be hydrolyzed to same. Lactose for instance is a disaccharide that can be hydrolyzed into two monosaccharides; glucose and galactose.

4. A monosaccharide cannot be hydrolyzed any further. As explained in 1 above, a monosaccharide is a simple sugar that cannot be hydrolyzed further; this is because it is the simplest form of sugar.