Which is a reducing sugar
Which is a reducing sugar
- Galactose
- Gluconic acid
- β-methyl galactoside
- Sucrose
The Correct Option is A
Solution and Explanation
The correct option is (A) : Galactose
Crystalline, sweet-tasting, and water-soluble, sugar is a material. A substance that reduces anything by having either an aldoses group or a ketoses group produces a reducing sugar. Reducing sugar includes all monosaccharides (which cannot undergo further hydrolysis). Disaccharides without aldehydic or ketonic groups, like maltose and lactose, function as reducing sugars. A monosaccharide is galactose (C6H12O6). It is just as sweet as sugar. The structure of galactose is similar to that of glucose, as illustrated in the above figure, but the atom configurations are different. It is a lowering sugar since it is a monosaccharide.
Top Questions on Biomolecules
- Write the reaction of D-Glucose with the following:
(a) HCN (b) Br$_2$ water (c) (CH$_3$CO)$_2$O- CBSE CLASS XII - 2025
- Chemistry
- Biomolecules
- Write two differences between DNA and RNA.
- CBSE CLASS XII - 2025
- Chemistry
- Biomolecules
- Assertion (A): Vitamin C cannot be stored in our body.
Reason (R): Vitamin C is water soluble and excreted in urine.- CBSE CLASS XII - 2025
- Chemistry
- Biomolecules
- Deficiency of vitamin B$_1$ causes the disease :
- CBSE CLASS XII - 2025
- Chemistry
- Biomolecules
- Peptide linkage and Glycosidic linkage
- CBSE CLASS XII - 2025
- Chemistry
- Biomolecules
Questions Asked in NEET exam
The current passing through the battery in the given circuit, is:
- NEET (UG) - 2025
- Current electricity
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
- NEET (UG) - 2025
- Pendulums
- Two cities X and Y are connected by a regular bus service with a bus leaving in either direction every T min. A girl is driving scooty with a speed of 60 km/h in the direction X to Y. She notices that a bus goes past her every 30 minutes in the direction of her motion, and every 10 minutes in the opposite direction. Choose the correct option for the period T of the bus service and the speed (assumed constant) of the buses.
- NEET (UG) - 2025
- Relative Velocity
- The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at \(22.5^\circ\) from the polarization axis of one of the polaroids (\(I_0\) is the intensity of polarised light after passing through the first polaroid):
- NEET (UG) - 2025
- Polarization
A full wave rectifier circuit with diodes (\(D_1\)) and (\(D_2\)) is shown in the figure. If input supply voltage \(V_{in} = 220 \sin(100 \pi t)\) volt, then at \(t = 15\) msec:
- NEET (UG) - 2025
- Semiconductor Diode
Concepts Used:
Biomolecules
Biomolecules are the most essential organic molecules, which are involved in the maintenance and metabolic processes of living organisms. These non-living molecules are the actual foot-soldiers of the battle of sustenance of life.
There are four major classes of Biomolecules – Carbohydrates, Proteins, Nucleic acids and Lipids.
- Carbohydrates are chemically defined as polyhydroxy aldehydes or ketones or compounds which produce them on hydrolysis.
- Proteins are another class of indispensable biomolecules, which make up around 50per cent of the cellular dry weight. Proteins are polymers of amino acids arranged in the form of polypeptide chains. The structure of proteins is classified as primary, secondary, tertiary and quaternary in some cases.
- Nucleic acids refer to the genetic material found in the cell that carries all the hereditary information from parents to progeny. There are two types of nucleic acids namely, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The main function of nucleic acid is the transfer of genetic information and synthesis of proteins by processes known as translation and transcription.
- Lipids are organic substances that are insoluble in water, soluble in organic solvents, are related to fatty acids and are utilized by the living cell.