Biomolecules — practice questions
72 curated practice questions from Biomolecules (Chemistry JEE Advanced, NTA Exams) — 60 hard, 12 medium. Every question includes the final answer free; step-by-step worked solutions with a free account.
- For many medical conditions, glucose has been administered in patients for a long time. Diseases like hypoglycemia…
- The pK a values for the three ionizable groups X, Y and Z of glutamic acid are 4.3, 9.7 and 2.2 respectively The…
- The following carbohydrate is
- What does ‘D’ and ( ) signifies in D – ( ) – glucose?
- Assertion (A) : Cellulose is not digestable in the human body. Reason (R) : The human system contain cellulose enzyme…
- Assertion (A) : DNA is responsible for maintaining the identity of different species of organisms over millions of…
- For ‘invert sugar’, the correct statement(s) is(are) (Given : specific rotations of (+)-sucrose, (+)-maltose, L…
- Starch molecules are polymer with repeating glucose units. Select the correct statement(s).
- H - C C - H HgSO _ 4 H _ 2 SO _ 4 ( ~A ) (1) NH _ 3 + HCN (2) H _ 3 O ^ ( B ) ; Product (B) of above reaction is
- Assertion (A) : Vitamin A, D, E and K are stored in liver and adipose tissue. Reason (R) : Vitamins are soluble in fats…
- Assertion (A) : Glucose on acetylation gives pentaacetate. Reason (R) : It contains five OH group.
- The correct statement(s) about the following sugars X and Y is (are) (2009) Y
- Assertion (A) : Glucose gives a reddish-brown precipitate with Fehling’s solution. Reason (R) : Reaction of glucose…
- A disaccharide X cannot be oxidised by bromine water. The acid hydrolysis of X leads to a laevorotatory solution. The…
- Statement-1 : Glucose gives a reddish-brown precipitate with Fehling’s solution. Statement-2 : Reaction of glucose with…
- The Fischer presentation of D -glucose is given below. The correct structure(s) of β - L -glucopyranose is (are).
- Assertion (A) : The sucrose mixture is laevorotatory. Reason (R) : Sucrose on hydrolysis gives dextrorotatory glucose (…
- Which one of the following amino acid does not give purple colour in the ninhydrin test?
- Cellulose upon acetylation with excess acetic anhydride/H 2 SO 4 (catalytic) gives cellulose triacetate whose structure…
- Stereoisomers of aldoheptose is (x) and stereoisomers of ketoheptose is (y). Ratio of x/y is
- Which L-sugar on oxidation gives an optically active dibasic acid (2 COOH groups) ?
- Aspartame, an artificial sweetener, is a dipeptide aspartyl phenylalanine methyl ester. The structure of aspartame is
- “Carbohydrate that cannot be hydrolysed further to give simpler unit of polyhydroxy aldehyde or ketone”. Name the type…
- Assertion (A) : The term vitamine is replaced by vitamin now days. Reason (R) : Vitamine came from vital + amine and it…
- Among the three compounds shown below, two yield the same product on reaction with warm HNO 3 . The exception is
- Assertion (A) : When RNA is hydrolysed, there is no relationship among the quantities of different bases obtained…
- Assertion (A) : Glucose does not form the hydrogen bisulphate addition product. Reason (R) : Glucose is not so reactive…
- Treatment of D-glucose with aqueous NaOH results in a mixture of monosaccharides, which are (2022)
- It has been observed that there is a strong need to promote health and independence through dietary approaches in an…
- The correct statement about the following disaccharide is
- -D-Glucopyranose and -D-Glucopyranose are
- Cellulose upon acetylation with excess acetic anhydride/H 2 SO 4 (catalytic) gives cellulose triacetate whose structure…
- The correct statement about the following disaccharide is (2018)
- Assertion (A) : Amino acids react with acid and base both. Reason (R) : In Zwitter ionic form, amino acids show the…
- Assertion (A) : Rhamnose is not a carbohydrate Reason (R) : It contains optically active polyhydroxy aldehydes or…
- Find iso-electric point of given amino acid
- Assertion (A) : -helix structure of proteins is in the shape of right handed screw. Reason (R) : There is hydrogen bond…
- The structure of D -(+)-glucose is The structure of L -(–)-glucose is
- Find iso-electric point of the given amino acid array l (II) pK _ a =2 array
- A disaccharide X cannot be oxidised by bromine water. The acid hydrolysis of X leads to a laevorotatory solution. The…
- Assertion (A) : Oligosaccharides are classified as disaccharides, trisaccharides, tetrasaccharides Reason (R) : It…
- Which of the following statements(s) is(are) true? (2019)
- Assertion (A) : Sucrose is called an invert sugar. Reason (R) : On hydrolysis, sucrose bring the change in the sign of…
- What is the product formed when D-glucose is treated with B r_ 2 water?
- Assertion (A) : All naturally occurring -amino acids except glycine are optically active. Reason (R) : Most naturally…
- For many medical conditions, glucose has been administered in patients for a long time. Diseases like hypoglycemia…
- Carbohydrates are those substances that contain a carbon atom, an hydrogen atom, and a oxygen atom in the ratio of…
- Carbohydrates have one or more chiral carbon atoms. This makes them-
- Name the linkage which is present in the above figure.
- Assertion (A) : Vitamin B and C must be supplied regularly in the diet. Reason (R) : Vitamins B and C are soluble in…
- Which one of the following does not constitute the nucleic acid ?
- Identify the monosaccharide units in the given structure.
- Carbohydrates are those substances that contain a carbon atom, an hydrogen atom, and a oxygen atom in the ratio of…
- Which of the following statement(s) is/are correct regarding vitamins ?
- Name the reagent and condition required for the following reaction.
- Name the enzyme that catalyses the reaction given below. maltose C _ 12 H _ 22 O _ 11 (7) gurse 2 C _ 6 H _ 12 O _ 6
- The correct statement(s) about the following sugars X and Y is (are)
- I. Disaccharides on hydrolysis with dilute acid gives three molecules of same or different monosaccharides. II…
- The total number of basic groups in the following form of lysine is (2010)
- Assertion (A) : The two strands of DNA are complementary to each others. Reason (R) : Adenine forms hydrogen bonds with…
- The two forms of D -glucopyranose obtained from the solution of D -glucose are called
- Assertion (A) : This compound does not form oxime. Reason (R) : Glucose pentaacetate doesn’t have a free –OH group at…
- Assertion (A) : D-(+) glucose is dextrorotatory in nature Reason (R) : ‘D’ represents its dextrorotatory nature
- Given (2021) The compound(s), which on reaction with HNO 3 will give the product having degree of rotation, [ ]_ D…
- I. Pyran is a cyclic organic compound with one oxygen atom and five carbon atom. II. The cyclic structure of glucose is…
- Assertion (A) : There is the coagulation of egg white on boiling. Reason (R) : When a protein in its native form is…
- Assertion (A) : Acetic acid is a carbohydrate. Reason (R) : Acetic acid fits into general formula C _ 2 ( H _ 2 O )_ y .
- Carbohydrates are those substances that contain a carbon atom, an hydrogen atom, and a oxygen atom in the ratio of…
- For many medical conditions, glucose has been administered in patients for a long time. Diseases like hypoglycemia…
- Treatment of D -glucose with aqueous NaOH results in a mixture of monosaccharides, which are
- It has been observed that there is a strong need to promote health and independence through dietary approaches in an…
- It has been observed that there is a strong need to promote health and independence through dietary approaches in an…