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13 questions
How many do classes of carbohydrate have?
1 class: monosaccharides
2 classes: monosaccharides, disaccharides
3 classes: monosaccharides, disaccharides and oligosaccharides
4 classes: monosaccharides, disaccharides, oligosaccharides, polysaccharides
The main functions of carbohydrates for human body:
Main source of energy
Spare protein from being burned so it can be used to build and repair
Dietary fiber can help lower blood cholesterol
Part of connective tissues, some hormones and enzymes and genetic material.
All above answers.
Monosaccharides include three main types:
Glucose, fructose and galactose
Retinol, Alpha-tocopherol and Menadione
Arginine, Glycine and Serin
All above answers are wrong!
What is the main difference between glucose and fructose structure?
Glucose makes a six membered ring, and fructose makes a five membered ring.
Glucose forms a pyranose ring structure, whereas fructose makes a furan ring structure
Glucose is an aldohexose, whereas fructose is a ketohexose.
All three answers are right!
Lactose is formed by reaction between:
Glucose and Glucose
Galactose and Fructose
Fructose and Glucose
Galactose and Glucose
Sucrose is formed by reaction between:
Glucose and Fructose
Glucose and Glucose
Fructose and Galactose
Galactose and galactose
Polysaccharides are large molecules containing
10 or more monosaccharide units
10 or more disaccharide units.
10 or more trisaccharide units.
All above answers are wrong.
Starch has two different types:
Maltose and Lactose
Maltose and Sucrose
Lactose and Sucrose
Amylose and Amylopectin
Cellulose is major structural material of cell wall of:
Animals
Plants
Bacteria
Insects
The image on the left is best classified as a
ketohexose
aldohexose
ketopentose
aldopentose
The stereochemistry on the three structures is
All L-
All D-
Mix of L and D
The center structure is
galactose
fructose
glucose
mannose
The structure on the right is
galactose
fructose
glucose
mannose
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