Question:

Which of the following statements is not true about glucose?

Updated On: Aug 7, 2023

It is an aldohexose.
On heating with HI it forms $n$-hcxane.
It is present in furanose form.
It does not give $2,4-DNP$ test.

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The Correct Option is C

Approach Solution - 1

Glucose is present is pyranose form (six membered cyclic structure).

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Approach Solution -2

Ans. Since glucose has six carbon atoms and an aldehyde group, it is an aldohexose. It exists in the pyranose form only; the furanose form is not present. It has a six-membered ring cyclic structure that is comparable to the chemical molecule pyran.

Glucose is a monosaccharide that is found in carbohydrates such as table sugar and starch.
It is also known as blood sugar or grape sugar.
It forms a pyranose ring structure and is represented as a ring of six members.
Being aldohexose, it is the body’s primary and preferred source of energy.
Glucose is mainly found in starch compounds.
Glucose is a group of carbohydrates of a simple sugar with the chemical formula C₆H₁₂O₆.
It is made up of an aldehyde group and 6 carbon atoms, so it’s also called aldohexose.
It exists in two forms which are either Ring (cyclic) form or open-chain (acyclic) form.
Glucose is a major source of energy for a lot of living organisms.
It is prepared by plants and algae with the help of water, sunlight, and carbon dioxide during photosynthesis.
It is found naturally in honey and fruits.
The glycogenolysis process is used to obtain glucose present in animals.
D-glucose and L-glucose are composed of similar atoms.
The sole difference between these two structures is often displayed using the Fisher model.
In the Fisher model, unlike D-glucose, the hydrogen and oxygen group of atoms present in L-glucose points to the left.
If these two specific molecules faced one another, they might appear as a mirrored image of one another.

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Glucose | Biomolecules

List-I (Hormones)	List-II (Functions)
A) Glucocorticoids	I) Control the carbohydrate metabolism
B) Mineralocorticoids	III) Control the level of excretion of water and salt by the kidneys
C) Progesterone	II) Prepares the uterus for implantation of fertilised egg
D) Estradiol	IV) In the control of menstrual cycle

Notes on Biomolecules

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.