NEET UG Biomolecules — practice questions
98 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NEET UG Biomolecules in the app →Amino acids contain an amino group along with a/an:The number of types of amino acids that occur in proteins is:The simplest amino acid, whose R group is a hydrogen atom, is:Proteins are polymers made up of:The chemical bond that links amino acids together in a protein is the:Enzymes are best described as:Nucleic acids such as DNA and RNA are polymers of:Glucose is an example of a:Glutamic acid is an example of a/an:Lysine is classified as a/an:Tyrosine, phenylalanine and tryptophan are examples of:Different amino acids differ from one another in their:Carbohydrates are organic compounds composed essentially of:Biomacromolecules in the acid-insoluble pool typically have molecular weightWhich is an example of a secondary metabolite per NCERT?Grinding tissue in trichloroacetic acid and filtering separates molecules intoHaemoglobin is the textbook example of which level of protein structure?A peptide bond forms betweenEssential amino acids are those the bodyHumans can digest starch but not cellulose becauseIn DNA, the base pairing A-T and G-C reflects thatEach nucleotide in a nucleic acid containsEnzymes speed up reactions byA competitive inhibitor of an enzymeAn enzyme that requires a tightly bound non-protein helper (e.g., haem in catalase) needs aGlucose in open-chain form has a:In proteins, the peptide bond is best described as a:The disease scurvy results from deficiency of:In DNA, the complementary base pair to adenine (A) is:A carbohydrate that cannot be hydrolysed to a simpler unit is called a:Carbohydrates yielding a large number of monosaccharide units on hydrolysis are:The linkage between two monosaccharide units through an oxygen atom is called:Amino acids contain a carboxyl group and which other functional group?The bond joining amino acids in a protein is called a:The two main types of nucleic acid are RNA and:Disaccharides whose reducing groups are bonded together are described as:Hydrolysis of one molecule of sucrose gives glucose and one molecule of:Hydrolysis of sucrose changes the sign of rotation, and the product is named:In aqueous solution an amino acid exists as a dipolar ion known as a:Insulin and albumins are given as common examples of which proteins?The overall folding of the polypeptide chain is which level of protein structure?In DNA, adenine forms hydrogen bonds with which base?How many levels of protein structure are described?During denaturation, which level of protein structure remains intact?The coagulation of egg white on boiling is given as a common example of:Which base found in RNA replaces thymine of DNA?Vitamins soluble in fats and oils but insoluble in water are grouped as:Carbohydrates are defined as optically active polyhydroxy:Carbohydrates are also known by which other name?A carbohydrate that cannot be hydrolysed further is a:Oligosaccharides give on hydrolysis how many monosaccharide units?Polysaccharides are also called non-sugars because they are not:Sugars that reduce Tollens' reagent are called:A monosaccharide holding an aldehyde group is called an:Glucose is an aldohexose also known as:Prolonged heating of glucose with hydrogen iodide gives:Glucose oxidised by bromine water yields:Oxidation of glucose with nitric acid gives:Glucose pentaacetate shows that glucose carries how many hydroxyls?Commercial glucose is obtained by hydrolysing starch at:The carbon whose hydroxyl decides alpha or beta glucose is called:The six membered ring form of glucose is called the:Fructose is best described as a:The five membered ring form of fructose is called the:Two monosaccharides joined through an oxygen atom share a:Sucrose is a non reducing sugar because both its:The laevorotatory mixture left after hydrolysing sucrose is called:Maltose on hydrolysis gives two units of:Lactose, the sugar of milk, is built from glucose and:The water soluble component of starch is:Amylopectin makes up roughly what share of starch?Cellulose is a straight chain polymer built only from:Carbohydrate is stored in the animal body as:All proteins are polymers of which kind of amino acid?The word protein comes from a Greek word meaning:Amino acids the body cannot make and must eat are called:The dipolar ion form of an amino acid is called a:Which amino acid is not optically active?Most naturally occurring amino acids carry which configuration?The bond joining two amino acids in a protein is a:A chain of more than ten amino acids is called a:Keratin and myosin are examples of which class of protein?Insulin and albumin are examples of which class of protein?The sequence of amino acids in a chain is its:The alpha helix and the beta pleated sheet belong to which level?The arrangement of sub-units in a protein is its:On denaturation a protein loses which structures?The coagulation of egg white on boiling is an example of:Almost all enzymes are which kind of protein?The name of an enzyme almost always ends in:Enzymes speed a reaction by lowering its:Which set of vitamins is fat soluble?Water soluble vitamins must be eaten regularly because they are:The sugar found in a DNA molecule is:Which base occurs in RNA but not in DNA?A base attached to a sugar without phosphate is called a:Nucleotides in a chain are joined by which linkage?In the DNA double helix adenine pairs with: