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Biomolecules Chemistry NEET MCQ for Students
What are the products formed when sucrose undergoes hydrolysis?
(a) Ribose and glucose
(b) Fructose and mannose
(c) Galactose and glucose
(d) Glucose and fructose
Option d – Glucose and fructose
Starch breaks down into which simple sugar during hydrolysis?
(a) Fructose
(b) Glucose
(c) Lactose
(d) Galactose
Option b – Glucose
When glucose is heated for a long time with hydroiodic acid, it forms
(a) Glucose hexaiodide
(b) Glucose pentaiodide
(c) Glucose tetraiodide
(d) n-Hexane
Option d – n-Hexane
Which of the following is classified as an aldotetrose?
(a) 2,3-dihydroxy propanal
(b) Erythrose
(c) Erythrulose
(d) Xylose
Option b – Erythrose
What type of sugar is fructose?
(a) Ketotetrose
(b) Ketohexose
(c) Aldotriose
(d) Aldohexose
Option b – Ketohexose
Which of the following is not an aldopentose?
(a) Xylose
(b) Arabinose
(c) Ribose
(d) Erythrose
Option d – Erythrose
How many asymmetric carbon atoms are found in glucose and fructose respectively?
(a) Five, two
(b) Five, five
(c) Four, three
(d) Four, four
Option c – Four, three
In animals, carbohydrates are mainly stored in the form of
(a) Glucose
(b) Sugar
(c) Glycogen
(d) Fructose
Option c – Glycogen
Which among the following is a disaccharide?
(a) Fructose
(b) Maltose
(c) Glucose
(d) Raffinose
Option b – Maltose
Which of these sugars is a trisaccharide?
(a) Stachyose
(b) Raffinose
(c) Galactose
(d) Fructose
Option b – Raffinose
Which group of biomolecules fits the general formula Cx(H₂O)y?
(a) Proteins
(b) Lipids
(c) Fats
(d) Carbohydrates
Option d – Carbohydrates
What is released upon hydrolysis of monosaccharides?
(a) 1 to 10 monosaccharide units
(b) 2 to 20 monosaccharide units
(c) No monosaccharide unit
(d) 5 to 15 monosaccharide units
Option c – No monosaccharide unit
Which of the following is classified as a ketose?
(a) Erythrose
(b) Arabinose
(c) Galactose
(d) Ribulose
Option d – Ribulose
Structural components of living organisms primarily consist of
(a) Proteins and cellulose
(b) Vitamins and lipids
(c) Proteins and 2-chlorobutane
(d) Cellulose and NaOH
Option a – Proteins and cellulose
Lipids are predominantly found in vegetable oils and
(a) Milk fats
(b) Biocatalyst
(c) Nucleic acids
(d) Vegetable oil
Option a – Milk fats
Which biomolecule contains the genetic information of living organisms?
(a) Vitamins
(b) Nucleic acids
(c) Carbohydrates and HCl
(d) Steroids
Option b – Nucleic acids
Which group includes optically active polyhydroxy aldehydes or ketones, or compounds that yield such units upon hydrolysis?
(a) Nucleic acids
(b) Proteins
(c) Carbohydrates
(d) Lipids
Option c – Carbohydrates
Glucose and fructose are types of
(a) Fatty acids
(b) Nucleic acids
(c) Lipids
(d) Sugars
Option d – Sugars
Fructofuranose can exist in how many anomeric forms?
(a) Four
(b) Three
(c) Two
(d) One
Option c – Two
The structure of glucose resembles
(a) A six-membered cyclic ring
(b) A six-membered ring like pyrene
(c) A five-membered ring like furan
(d) A five-membered cyclic ring
Option b – A six-membered ring like pyrene
What is inverted sugar?
(a) A variant of sucrose
(b) A blend of glucose and galactose
(c) An equal mixture of glucose and fructose
(d) A sugar that is optically inactive
Option c – An equal mixture of glucose and fructose
The ring structure of glucose (pyranose form) includes
(a) Amide bond
(b) Ether linkage
(c) Ester linkage
(d) Imine bond
Option b – Ether linkage
What is formed when glucose reacts with hydrogen cyanide?
(a) Rearranged product
(b) Oxidation product
(c) Reduction product
(d) Glucose cyanohydrin
Option d – Glucose cyanohydrin
If compound A forms saccharic acid upon oxidation with nitric acid, then A is
(a) Glucose
(b) Glucoxime
(c) Fructose
(d) Galactose
Option a – Glucose
How many hydroxyl (-OH) groups are present in glucose pentacetate?
(a) Two
(b) Zero
(c) Five
(d) Eight
Option b – Zero
A monosaccharide gives a triacetate upon acetylation but does not react with bromine water. Identify the sugar.
(a) Ribose
(b) Erythrose
(c) Erythrulose
(d) Xylulose
Option c – Erythrulose
Which of the following is a naturally occurring laevorotatory sugar found in fruits?
(a) Maltose
(b) Lactose
(c) Sucrose
(d) Fructose
Option d – Fructose
Which statement about glucose is incorrect?
(a) It is an aldohexose
(b) It is a carbohydrate
(c) It belongs to the aldose family
(d) It reacts with semicarbazide
Option d – It reacts with semicarbazide
Glyceraldehyde and dihydroxyacetone represent which type of isomerism?
(a) Anomers
(b) Enantiomers
(c) Epimers
(d) Functional isomers
Option d – Functional isomers
When glucose is reacted with hydroxylamine, the product formed is
(a) Glucose hydrazone
(b) Glucose phenylhydrazone
(c) Glucoxime
(d) Glucose semicarbazone
Option c – Glucoxime
Which polymer is commonly used for manufacturing bulletproof jackets?
(a) Bakelite
(b) Polyamides
(c) Teflon
(d) Polyurethane
Option b – Polyamides
Which gas binds rapidly with hemoglobin, disrupting its function?
(a) Methane
(b) Nitrogen dioxide
(c) Carbon monoxide
(d) Sulphur dioxide
Option c – Carbon monoxide
Why does cyanide poisoning result in sudden death?
(a) It disrupts the electron transport chain
(b) It causes heart muscle enzyme denaturation
(c) It induces cardiac arrest
(d) It breaks down red blood cells
Option a – It disrupts the electron transport chain
Sweat primarily consists of water and
(a) Citric acid
(b) Lactic acid
(c) Salt
(d) Vinegar
Option c – Salt
Which of the following correctly describes the relationship between proteins and enzymes?
I. Every protein is an enzyme
II. All enzymes are proteins
III. Some enzymes are not proteins
IV. Not all proteins are enzymes
(a) I and III
(b) II and IV
(c) I, II, and III
(d) II, III, and IV
Option b – II and IV
Identify the substance that is not a polymer.
(a) Nylon
(b) Teflon
(c) Caprolactam
(d) Polystyrene
Option c – Caprolactam
Which of these is a naturally occurring polymer?
(a) Nylon
(b) Teflon
(c) PVC
(d) Cellulose
Option d – Cellulose
Bakelite is synthesized by the reaction between
(a) Urea and formaldehyde
(b) Phenol and formaldehyde
(c) Phenol and acetaldehyde
(d) Melamine and formaldehyde
Option b – Phenol and formaldehyde
What is the common name for polytetrafluoroethylene?
(a) Polytetrafluoroethylene
(b) Polyvinyl chloride
(c) Polyvinyl fluoride
(d) Dichlorodifluoromethane
Option a – Polytetrafluoroethylene
Which substance is used as a non-stick coating on cookware? ( Biomolecules Chemistry NEET MCQ )
(a) Orlon
(b) Teflon
(c) Polystyrene
(d) Polypropylene
Option b – Teflon
Which of the following polymers does not degrade naturally?
(a) Cellulose
(b) Starch
(c) Protein
(d) PVC
Option d – PVC
Phenol is a key ingredient in the production of ( Biomolecules Chemistry NEET MCQ )
(a) PVC
(b) Nylon
(c) Polystyrene
(d) Bakelite
Option d – Bakelite
Consider the following about vitamins:
I. They are complex organic compounds
II. Required in small quantities for survival
III. Water-soluble vitamins are stored in the body
Which statements are accurate?
(a) I and II
(b) I and III
(c) II and III
(d) Only III
Option a – I and II
Which of the following regarding vitamins is true?
I. Vitamin C is crucial for connective tissue synthesis
II. Vitamin D aids in the formation of eye pigments
III. Vitamin B₂ helps red blood cells mature
IV. Vitamin C facilitates calcium utilization
(a) I and II
(b) I and III
(c) II and IV
(d) I and IV
Option b – I and III
Enzymes are known to ( Biomolecules Chemistry NEET MCQ )
(a) Speed up chemical reactions in cells
(b) Be made up of amino acids
(c) Work best at normal body temperature
(d) Exhibit all of the above characteristics
Option d – Exhibit all of the above characteristics
Which hormone contains a peptide structure? ( Biomolecules Chemistry NEET MCQ )
(a) Oxytocin
(b) Corticotropin
(c) Insulin
(d) Cortisone
Option a – Oxytocin
What is the main function of enzymes within living organisms?
(a) Transport oxygen
(b) Boost immunity
(c) Accelerate biochemical reactions
(d) Supply energy
Option c – Accelerate biochemical reactions
The enzyme that digests gelatin during silver recovery from photographic film is ( Biomolecules Chemistry NEET MCQ )
(a) Amylase
(b) Pepsin
(c) Lipase
(d) None of these
Option b – Pepsin
Which vegetable oil lacks essential fatty acids? ( Biomolecules Chemistry NEET MCQ )
(a) Sunflower oil
(b) Mustard oil
(c) Coconut oil
(d) Groundnut oil
Option a – Sunflower oil
Which of the following contains magnesium? ( Biomolecules Chemistry NEET MCQ )
(a) Carbonic anhydrase
(b) Vitamin B₁₂
(c) Chlorophyll
(d) Haemocyanin
Option c – Chlorophyll
Identify the incorrect statement:
(a) Pars distalis produces the growth hormone
(b) Pars intermedia releases only one hormone
(c) Pars nervosa releases two hormones
(d) Pars distalis does not produce any hormone
Option d – Pars distalis does not produce any hormone
What is the yellowish region at the back of the eye packed with cones?
(a) Pupil
(b) Macula lutea
(c) Iris
(d) Blind spot
Option b – Macula lutea
Which structure produces progesterone? ( Biomolecules Chemistry NEET MCQ )
(a) Alveoli
(b) Corpus luteum
(c) Leydig cells
(d) Interstitial cells
Option b – Corpus luteum
What is the U-shaped bone found at the base of the mouth and part of the skull? ( Biomolecules Chemistry NEET MCQ )
(a) Clavicle
(b) Acromion
(c) Malleus
(d) Hyoid
Option d – Hyoid
What protein in rod cells contains a vitamin A derivative? ( Biomolecules Chemistry NEET MCQ )
(a) Rhodopsin
(b) Myoglobin
(c) Actin
(d) Chymotrypsin
Option a – Rhodopsin
Cholecystokinin acts on which organs?
(a) Gastric glands and atria
(b) Pancreas and gallbladder
(c) Urinary bladder and urethra
(d) Prostate gland and Cowper’s gland
Option b – Pancreas and gallbladder
How many cervical vertebrae are found in most mammals? ( Biomolecules Chemistry NEET MCQ )
(a) 7
(b) 12
(c) 15
(d) 20
Option a – 7
Which of the following statements is incorrect? ( Biomolecules Chemistry NEET MCQ )
(a) The cerebral aqueduct runs through the midbrain
(b) The midbrain has four dorsal swellings known as corpora quadrigemina
(c) Meninges are a bundle of nerve fibers connecting the hemispheres
(d) The cerebral cortex has areas for association
Option c – Meninges are a bundle of nerve fibers connecting the hemispheres
What do olfactory receptors detect? ( Biomolecules Chemistry NEET MCQ )
(a) Taste
(b) Smell
(c) Touch
(d) Pain
Option b – Smell
Overproduction of growth hormone in middle-aged adults leads to ( Biomolecules Chemistry NEET MCQ )
(a) Acromegaly
(b) Graves’ disease
(c) Addison’s disease
(d) Exophthalmic goiter
Option a – Acromegaly
What type of joint is present between the carpal bones? ( Biomolecules Chemistry NEET MCQ )
(a) Pivot
(b) Hinge
(c) Gliding
(d) Saddle
Option c – Gliding
Choose the correct statements about neurons:
Statement I: Afferent neurons receive stimuli from sense organs.
Statement II: Efferent neurons are motor neurons.
(a) Only I is correct
(b) Only II is correct
(c) Both statements are correct
(d) Both statements are incorrect
Option c – Both statements are correct
Which gland secretes the hormone that maintains daily biological rhythms?
(a) Adrenal
(b) Thyroid
(c) Pineal
(d) Thymus
Option c – Pineal
Which bone is not part of the forelimb? ( Biomolecules Chemistry NEET MCQ )
(a) Humerus
(b) Femur
(c) Radius
(d) Metacarpal
Option b – Femur
Which group consists entirely of motor nerves? ( Biomolecules Chemistry NEET MCQ )
(a) Olfactory, Maxillary, Hypoglossal
(b) Vagus, Auditory, Abducens
(c) Abducens, Trochlear, Oculomotor
(d) Facial, Oculomotor, Vagus
Option c – Abducens, Trochlear, Oculomotor
Choose the incorrect statement: ( Biomolecules Chemistry NEET MCQ )
(a) Cortisol promotes red blood cell formation
(b) Aldosterone is secreted by the adrenal cortex
(c) Epinephrine and norepinephrine are catecholamines
(d) The adrenal medulla releases corticoids
Option d – The adrenal medulla releases corticoids
Which of the following matches is incorrect? ( Biomolecules Chemistry NEET MCQ )
(a) Vertebrochondral ribs – 8th, 9th, 10th pairs
(b) Floating ribs – 11th and 12th pairs
(c) True ribs – 1st to 7th pairs
(d) False ribs – 9th and 10th pairs
Option d – False ribs – 9th and 10th pairs
What controls pupil diameter?
(a) Anterior sclera
(b) Iris muscle fibers
(c) Ciliary body
(d) Choroid
Option b – Iris muscle fibers
Which statement about ANF (Atrial Natriuretic Factor) is true? ( Biomolecules Chemistry NEET MCQ )
(a) Released from GI tract
(b) Secreted when BP drops
(c) Stimulates gastric juice secretion
(d) It is a peptide hormone
Option d – It is a peptide hormone
Which is an incorrect statement? ( Biomolecules Chemistry NEET MCQ )
(a) Clavicle is the collarbone
(b) Two halves of the pelvic girdle form the pubic symphysis
(c) Scapula is on the back of the thorax
(d) Limbs and girdles are part of the axial skeleton
Option d – Limbs and girdles are part of the axial skeleton
How do ova and zygote move through the ampulla of the fallopian tube?
(a) Ciliary movement
(b) Amoeboid movement
(c) Muscular movement
(d) Flagellar movement
Option a – Ciliary movement
The vestibular apparatus of the inner ear consists of semicircular canals and ( Biomolecules Chemistry NEET MCQ )
(a) Otolith
(b) Malleus
(c) Eustachian tube
(d) Labyrinth
Option a – Otolith
The hypothalamus produces which hormones?
(a) Oxytocin and prolactin
(b) Melatonin and ADH
(c) Oxytocin and vasopressin
(d) TSH and prolactin
Option c – Oxytocin and vasopressin
Which of the following statements regarding osteoporosis is correct? ( Biomolecules Chemistry NEET MCQ )
(a) Caused by excess estrogen
(b) Characterized by bone mass reduction
(c) Affects young children between 2–5 years
(d) Involves muscle degeneration
Option b – Characterized by bone mass reduction
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