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NEET - Grade 12 - Chemistry - Biomolecules - Introduction and Snapshot of Biomolecules - Study ref# 890

Introduction: A living system grows, sustains and reproduces itself. The most amazing thing about a living system is that it is composed of non-living atoms and molecules. The pursuit of knowledge of what goes on chemically within a li... read more

NEET - Grade 12 - Chemistry - Biomolecules - Introduction and Snapshot of Biomolecules - Study ref# 891

Following sections must be covered to understand the Biomolecules: 1. Carbohydrates 2. Proteins 3. Enzymes 4. Vitamins 5. Nucleic Acids... read more

NEET - Grade 12 - Chemistry - Biomolecules - Target Setup for Biomolecules - Study ref# 892

Student requires to achieve the following milestones to get better grip over Biomolecules. The milestones / targets are as follows: Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter Test000%Su... read more

NEET - Grade 11 - Biology - Biomolecules - Importance and Snapshot of Biomolecules - Study ref# 761

Introduction: There is a wide diversity in living organisms in our biosphere. Now a question that arises in our mind is : Are all living organisms made of the same chemicals, i.e., elements and compounds ? You have learnt in chemist... read more

NEET - Grade 11 - Biology - Biomolecules - Importance and Snapshot of Biomolecules - Study ref# 762

Following sections must be covered to understand the Biomolecules: 1. How to analyze chemical composition? 2. Primary and Secondary Metabolites 3. Biomacromolecules 4. Proteins 5. Polysacharides 6. Nucleic Acids 7. Structur... read more

NEET - Grade 11 - Biology - Biomolecules - Target Setup for Biomolecules - Study ref# 763

Student requires to achieve the following milestones to get better grip over Biomolecules. The milestones / targets are as follows:Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter Test000%Subject ... read more

NEET - Grade 11 - Biology - Biomolecules - Study ref# 4132

What is the composition of triglycerides? Answer: Naturally occurring fats and oils are Triglycerides. Triglycerides consist of three fatty acids bound to a Glycerol backbone. Each fatty acid consists of a Carbon-Hydrogen chain with a Carboxyl group ... read more

NEET - Grade 11 - Biology - Biomolecules - Study ref# 4136

What is zwitterion? Answer: An amino acid has both a basic amine group and an acidic carboxylic acid group. There is an internal transfer of a hydrogen ion from the -COOH group to the -NH2 group to leave an ion with both a negative charge and a posit... read more

NEET - Grade 11 - Biology - Biomolecules - Study ref# 4143

Give the structure of ATGC? Answer: ... read more

NEET - Grade 11 - Biology - Biomolecules - Study ref# 4147

Describe the structure of tRNA? Answer: The crystal structures of several tRNA molecules have been determined. All tRNA molecules have very similar secondary structures in which the single-stranded chain is folded in a clover-leaf structure that has ... read more

NEET - Grade 11 - Biology - Biomolecules - Study ref# 4151

What are glycosidic bonds? Answer: A type of covalent chemical bond that joins two simple sugars via an oxygen atom. The bond may be either above the plane of the ring as in a beta glycosidic bond or below the plane as in an alpha glycosidic linkage.... read more

NEET - Grade 11 - Biology - Biomolecules - Study ref# 4167

Describe the Watson and Crick model of DNA? Answer: In 1953 James Watson and Francis Crick deduced the three dimensional structure of DNA. This brilliant research work ranks as one of the most IMPORTANT in biology because it led the way to an underst... read more

NEET - Grade 11 - Biology - Biomolecules - Study ref# 4169

What are the main difference between RNA and DNA? Answer: RNA molecules are single-stranded The sugar in RNA is a ribose sugar (as opposed to deoxy-ribose) and has an –OH at the 2 C position highlighted in red in the figure below (DNA sugars have –H ... read more

NEET - Grade 11 - Biology - Biomolecules - Study ref# 4170

Discuss in detail about the protein structures? Answer: Primary protein structure: The primary structure of peptides and proteins refers to the linear number and order of the amino acids present. The convention for the designation of the order of ... read more

NEET - Grade 11 - Biology - Mineral Nutrition - Study ref# 4415

List features of essential elements? Answer: Features of essential elements: a) They are very specific and are not replace by other elements. b) These elements are directly involve in different life cycle of plants. Functions:... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10008

Glycogen is a branched chain polymer of α-D glucose units in which chain is formed by  glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar to …….. . (a) am... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10009

Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives…….  . (a) 2 molecules of glucose (b) 2 molecules of glucose + 1molecule of fructose (c)1 molecule of glucose + 1 molecule of fructose (... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10010

Which of the following pairs represents anomers? Hints- This problem is based on the concept of anomer. Saccharide which differ in configuration at C-1 are known as anomers. Answer: Anomers have different configuration at C-1. ... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10011

Which of the following acids is a vitamin? (a) Aspartic acid    (b) Ascorbic acid    (c) Adipic acid    (d) Saccharide acid Answer: (b) Ascorbic acid is the chemical name of vitamin C. While others are not vitamins aspartic acid is an ami... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10012

Nucleic acids are the polymers of (a) nucleosides   (b) nucleotides      (c) bases         (d) sugars Answer: Nucleic acids are polymers of nucleotides in which nucleic acids are linked together by phosphodiester linkage. e.g., D.N.A... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10015

Structure of disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units. (a) ‘a’ carbon of glucose and ‘a’ carbon of fructose (b) ‘a’ carbon of glucose and ‘e’ carbon of fr... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10017

Amino acids are classified as acidic, basic or neutral depending upon the relative number of amino and carboxyl groups in their molecule. Which of the following are acidic? Hints – This problem is based on concept of nature of amino a... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10019

How do you explain the presence of all the six carbon atoms in glucose in a straight chain? Answer: Glucose on heating with HI produces n-hexane. This suggests that all the six carbon atoms of glucose are linked in a straight chain.... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10020

Name the linkage connecting monosaccharide units in polysaccharides. Answer: Glycosidic linkage connects monosaccharide units in polysaccharides. ... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10021

Under what conditions glucose is converted to gluconic acid and saccharide acid? Answer: Glucose on oxidation with  produces gluconic acid (six carbon carboxylic acid). Glucose on oxidation with nitric acid produces saccharide acid.(d... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10022

The letters ‘D’ or ‘L’ before the name of a stereoisomer of a compound indicate the correlation of configuration of that particular stereoisomer. This refers to their relation with one of the isomers of glyceraldehyde. Predict whether the fo... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10024

Α-helix is a secondary structure of proteins formed by twisting of polypeptide chain into right handed screw like structure. Which type of interactions are responsible for making the α-helix structure stable? Answer: 𝛂- ... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10026

How do you explain the presence of five   groups in glucose molecule? Answer: Glucose on reaction with acetic anhydride produces glucose pentaacetate. This reaction explain presence of five  groups.... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10027

Sucrose is dextrorotatory but the mixture obtained after hydrolysis is laevorotatory. Explain. Answer: Sucrose is dextrorotatory. On hydrolysis, it produces a mixture of glucose and fructose having specific rotation  and  . Thus, the respective... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10029

How do you explain the presence of an aldehydic group in a glucose molecule? Answer: Glucose on reaction with bromine water produces gluconic acid. This indicates the presence of CHO group. ... read more

NEET - Grade 12 - Chemistry - Biomolecules - Study ref# 10030

What are glycosidic linkages? In which type of biomolecules are they present? Answer: Linkage between two monosaccharide due to oxide linkage formed by the loss of a water molecule, is known as glycosidic linkage as shown below  ... read more

NEET - Grade 12 - Chemistry - Chemistry in Everyday Life - Study ref# 10061

The most useful classification of drugs for medicinal chemists is……. (a) on the basis of chemical structure (b) on the basis of drug action (c) on the basis of molecular targets (d) on the basis of pharmacological effect A... read more

NEET - Grade 12 - Chemistry - Chemistry in Everyday Life - Study ref# 10069

Which of the following is not a target molecule for drug function in body? (a) Carbohydrates      (b) Lipids     (c) Vitamins        (d) Proteins Answer: (c) Drugs usually interact with biomolecules as carbohydrates, lipids, proteins and ... read more

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