Question
Which of the following sugar is found in milk?
The correct answer is
Lactose
Milk Sugar Identification: The Carbohydrate in Milk
The question asks to identify the specific type of sugar found primarily in milk. Let's break down the options and understand why one is correct.
Understanding Milk Composition
Milk, particularly mammalian milk, is known for its nutritional content, including proteins, fats, vitamins, minerals, and carbohydrates. The primary carbohydrate present in milk is a type of sugar.
Analyzing the Sugar Options
We need to determine which of the given sugars is characteristic of milk:
- Glucose: This is a simple sugar (monosaccharide) and is a primary energy source for the body. While present in trace amounts in milk, it's not the main sugar.
- Fructose: Commonly known as fruit sugar, this is also a simple sugar (monosaccharide). It is found abundantly in fruits and honey, not typically in milk.
- Lactose: This is a disaccharide, meaning it's formed from two simpler sugar units joined together. Lactose is specifically known as "milk sugar" because it is the predominant carbohydrate found in milk and dairy products. It is composed of one molecule of galactose and one molecule of glucose. Its chemical formula is $C_{12}H_{22}O_{11}$.
- Galactose: This is a simple sugar (monosaccharide). While galactose is one of the two components making up lactose, it is not found freely or predominantly as the main sugar in milk. It's released when lactose is broken down.
Conclusion on Milk Sugar
Based on the analysis, Lactose is the sugar uniquely and predominantly found in milk. It provides energy and aids in calcium absorption.
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Important Questions from Miscellaneous
- Which of the following relationships is/are not true?
(A). Most probable velocity = $\sqrt{\frac{2RT}{M}}$
(B). PV = $\frac{3}{2}kT$
(C). Compressibility factor Z = $\frac{pV}{nRT}$
(D). Average kinetic energy of gas = $\frac{1}{2}kT$
Choose the correct answer from the options given below - Match List-I with List-II
List-I List-II Electronic Configuration First Ionisation energy (kJ mol$^{-1}$) (A). ns$^2$ (I). 2100 (B). ns$^2$np$^1$ (II). 1400 (C). ns$^2$np$^3$ (III). 800 (D). ns$^2$np$^6$ (IV). 900
Choose the correct answer from the options given below: - The shielding constant of a 2p electron (calculated using Slater's rules) is
- Match List-I with List-II
List-I List-II Spectroscopy Property (A). Raman (I). Polarizability (B). FTIR (II). Dipole Moment (C). UV-Visible (III). Absorbance (D). NMR (IV). Spin
Choose the correct answer from the options given below: - The structure of protein comprises of:
(A). Primary structure of protein is associated with amino acids
(B). Secondary structure of protein is associated to peptides
(C). Tertiary structure of protein is associated with polypeptide chains
(D). Quaternary structure of protein is associated with polypeptide chains
Choose the correct answer from the options given below:
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