Carbohydrates are essential molecules in biology, often categorized based on their size and structure. They can be classified into three main groups: monosaccharides, disaccharides, and polysaccharides.
The question asks to identify which option lists compounds that are disaccharides. Let's analyze each option:
| Type | Description | Examples |
| Monosaccharide | Simplest sugar unit | Glucose, Galactose, Fructose, Ribose, Xylose |
| Disaccharide | Two monosaccharide units joined | Maltose, Lactose, Sucrose |
| Polysaccharide | Many monosaccharide units joined | Starch, Glycogen, Cellulose |
Starch and glycogen are both large, complex carbohydrates used for energy storage in plants and animals, respectively. They are classified as polysaccharides because they consist of many glucose units linked together.
Therefore, this option is incorrect.
Glucose and galactose are simple sugar molecules. They are the basic units from which larger carbohydrates are built. Both are classified as monosaccharides.
Therefore, this option is incorrect.
Maltose (malt sugar) is a disaccharide formed by linking two glucose units (Glucose + Glucose). Lactose (milk sugar) is a disaccharide formed by linking glucose and galactose (Glucose + Galactose).
Since both maltose and lactose are composed of two monosaccharide units, they are correctly identified as disaccharides.
Therefore, this option is correct.
Ribose is a five-carbon sugar (pentose) crucial for RNA and ATP. Xylose is also a five-carbon sugar. Both are fundamental sugar units and are classified as monosaccharides.
Therefore, this option is incorrect.
Based on the analysis, the option that correctly represents disaccharides is the one listing maltose and lactose.
With reference to pre-packaged items in India, it is mandatoy to the manufacturer to put which of the following information on the main label, as per the Food Safety and Standards (Packaging and Labelling) Regulations, 2011?
1. List of ingredients including additives
2. Nutrition information
3. Recommendations, if any, made by the medical profession about the possibility of any allergic reactions
4. Vegetarian/non-vegetarian
Select the correct answer using the code given below.
Which of the following is/are the indicator/indicators used by IFPRI to compute the Global Hunger Index Report?
1. Undernourishment
2. Child stunting
3. Child mortality
Select the correct answer using the code given below.
Consider the following statements:
(1) Animal Welfare Board of India is established under the Environment (Protection) Act, 1986.
(2) National Tiger Conservation Authority is a statutory body.
(3) National Ganga River Basin Authority is chaired by the Prime Minister.
Which of the statements given above is/ are correct?