NEET Chemistry Questions: Biomolecules

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Which the following is the word regarding steroids is not correct?




Steroids are a class of organic compounds that include hormones and other substances. Cortisone, Progesterone, and Ergosterol are all steroids. However, Glycolipids are not steroids; they are compounds made of carbohydrates and lipids. Therefore, the statement that Glycolipid is a steroid is incorrect.
Which of the following statement regarding to properties of starch is not correct?




Starch is a polysaccharide made up of amylose and amylopectin chains, and it is the stored form of energy in plants. Starch is generally not soluble in cold water, which makes the statement that it is soluble in water incorrect. Therefore, option o3 is the correct choice as it is not a true property of starch.
Which one of the following pairs is not correctly matched?




Cortisone is actually a steroid hormone, not a sterol. Sterols are a subgroup of steroids and include substances such as cholesterol. Therefore, the pair 'Cortisone – sterols' is not correctly matched.
Which one of the following pairs is correctly matched?




No explanation available.
Lipids are relatively insoluble in….




Lipids are hydrophobic molecules and are relatively insoluble in water due to their nonpolar nature. They are, however, soluble in organic solvents such as chloroform, benzene, and ether. Therefore, lipids are relatively insoluble in water.
Which of the following statement regarding the Fatty acid is not correct?




Saturated fatty acids are not capable of accepting hydrogen or halogen atoms because they do not have double bonds. They are fully 'saturated' with hydrogen atoms, meaning all carbon atoms are single-bonded to hydrogen atoms. Hence, they cannot accept more hydrogen or halogen atoms.
Which of the following statement regarding to Lipid is not correct?




Lipids are formed of carbon (C), hydrogen (H), and oxygen (O) atoms, but the number of hydrogen atoms is usually much greater than the number of oxygen atoms. This statement is incorrect: 'The number of H atom is less than that of O.'
In the formation of triglyceride, glycerol get linked with any Fatty acids by…




No explanation available.
Which of the following the correct option for statement P and statement Q P : In animal the food is stored as glycogen Q : Amylase and amylopectin are occuring in the constitution of glycogen.




No explanation available.
Read the assertion and reason carefully to mark the correct option out of the options given below: A : Complex lipid which contain a non lipid constituent in addition ti alcohol and fatty acids. R : Phospholipid and Glycolipid are example of complex lipid




No explanation available.
Read the assertion and reason carefully to mark the correct option out of the options given below: A : The general formula of disaccharide is Cdn d (Hd 2d O)dn-1 d R : The formula of sucrose is Cd12 d Hd22 d Od11 d




No explanation available.
Read the assertion and reason carefully to mark the correct option out of the options given below: A : Oleic acid contain 18 carbon atoms and two successive carbon atoms at certain places therein are linked by double bond. R : Oleic acid are long chain unsaturated fatty acid.




Oleic acid is a monounsaturated fatty acid with the chemical formula C_{18}H_{34}O_2. It has 18 carbon atoms, and there is one double bond between the 9th and 10th carbon atoms. Hence, both the assertion and the reason are true, and the reason correctly explains the assertion.
Read the assertion and reason carefully to mark the correct option out of the options given below: A: In the structure of oils, a molecules of three fatty acids and one glycerol. R : In the structure of oils only one Glycosidic bond.




In the structure of oils, a molecule typically consists of one glycerol and three fatty acids, forming a triglyceride. However, triglycerides are connected by ester bonds, not glycosidic bonds, which are found in carbohydrates. Therefore, the assertion is true, but the reason is false.
Read the assertion and reason carefully to mark the correct option out of the options given below: A: In fish liver oil, glycerol is present as alcohol. R : Glycerol are monohydroxy alcohol.




The assertion states that in fish liver oil, glycerol is present as alcohol, which is true. However, the reason claims that glycerol is a monohydroxy alcohol, which is incorrect because glycerol is actually a trihydroxy alcohol. Therefore, the assertion is true but the reason is false.
The middle Lamella is made up of…… [CBSE AIPMT 2009]




The middle lamella is a pectin-rich layer that holds plant cells together. It is primarily composed of calcium pectate, which acts as a cementing substance. This middle layer plays a crucial role in cell adhesion and maintaining the integrity of plant tissues.