Practice 148 Bioenergetics MCQs — Page 2 of 3
Question 51: Which molecule contains a triple bond?
- A N₂
- B O₂
- C H₂
- D Cl₂
Explanation: Nitrogen has an N≡N bond. Useful for: MDCAT 2027, NUMS 2027.
Question 52: Which compound shows hydrogen bonding?
- A H₂O
- B NaCl
- C CH₄
- D CO₂
Explanation: Water has H bonded to highly electronegative oxygen. Useful for: MDCAT 2027, NUMS 2027.
Question 53: The shape of the ammonia (NH₃) molecule is:
- A Tetrahedral
- B Trigonal pyramidal
- C Linear
- D Planar
Explanation: One lone pair gives a pyramidal shape. Useful for: MDCAT 2027, NUMS 2027.
Question 54: Increasing pressure on N₂ + 3H₂ ⇌ 2NH₃ shifts the equilibrium:
- A Does not shift
- B Cannot be predicted
- C Towards products
- D Towards reactants
Explanation: Fewer gas moles are on the product side. Useful for: MDCAT 2027, NUMS 2027.
Question 55: In an electrolytic cell, reduction occurs at the:
- A Electrolyte
- B Cathode
- C Salt bridge
- D Anode
Explanation: Reduction always takes place at the cathode. Useful for: MDCAT 2027, NUMS 2027.
Question 56: The standard electrode potential of the standard hydrogen electrode is:
- A −1.00 V
- B 0.00 V
- C 0.76 V
- D 1.00 V
Explanation: The SHE is defined as zero volts. Useful for: MDCAT 2027, NUMS 2027.
Question 57: The oxidation number of Mn in KMnO₄ is:
- A +6
- B +2
- C +7
- D +4
Explanation: K = +1 and O₄ = −8, so Mn = +7. Useful for: MDCAT 2027, NUMS 2027.
Question 58: Which gas is mainly responsible for acid rain?
- A Argon
- B Helium
- C Nitrogen
- D Sulphur dioxide
Explanation: SO₂ and NOx form acids in the atmosphere. Useful for: MDCAT 2027, NUMS 2027.
Question 59: Which law states that PV is constant at constant temperature?
- A Avogadro's law
- B Gay-Lussac's law
- C Boyle's law
- D Charles's law
Explanation: Pressure and volume are inversely proportional. Useful for: MDCAT 2027, NUMS 2027.
Question 60: At STP, one mole of an ideal gas occupies:
- A 22.4 L
- B 11.2 L
- C 1 L
- D 24 L
Explanation: STP molar volume is 22.4 L. Useful for: MDCAT 2027, NUMS 2027.
Question 61: Which of the following is a crystalline solid?
- A Sodium chloride
- B Rubber
- C Glass
- D Plastic
Explanation: NaCl has an ordered crystal lattice. Useful for: MDCAT 2027, NUMS 2027.
Question 62: The number of moles in 36 g of water (H₂O = 18 g/mol) is:
- A 3
- B 18
- C 2
- D 1
Explanation: 36 ÷ 18 = 2. Useful for: MDCAT 2027, NUMS 2027.
Question 63: The IUPAC name of CH₃CH₂OH is:
- A Propanol
- B Ethanol
- C Ethanal
- D Methanol
Explanation: Two carbons with an -OH group give ethanol. Useful for: MDCAT 2027, NUMS 2027.
Question 64: Which functional group is present in aldehydes?
- A -CO-
- B -COOH
- C -CHO
- D -OH
Explanation: Aldehydes contain the formyl group. Useful for: MDCAT 2027, NUMS 2027.
Question 65: Alkenes mainly undergo which type of reaction?
- A Substitution reactions
- B Condensation reactions
- C Polymer cracking only
- D Addition reactions
Explanation: The C=C bond readily adds reagents. Useful for: MDCAT 2027, NUMS 2027.
Question 66: The general formula of alkynes is:
- A CnH2n
- B CnH2n+2
- C CnH2n−2
- D CnHn
Explanation: Alkynes have one triple bond. Useful for: MDCAT 2027, NUMS 2027.
Question 67: Benzene mainly undergoes:
- A Elimination
- B Electrophilic substitution
- C Nucleophilic addition
- D Free radical addition
Explanation: Its aromatic stability favours substitution. Useful for: MDCAT 2027, NUMS 2027.
Question 68: The complete oxidation of a primary alcohol gives a:
- A Ketone
- B Carboxylic acid
- C Alkane
- D Ether
Explanation: Strong oxidants convert primary alcohols to acids. Useful for: MDCAT 2027, NUMS 2027.
Question 69: An ester is formed by the reaction of an alcohol with a:
- A Alkane
- B Carboxylic acid
- C Aldehyde
- D Ketone
Explanation: Fischer esterification joins an acid and an alcohol. Useful for: MDCAT 2027, NUMS 2027.
Question 70: The functional group of carboxylic acids is:
- A -NH₂
- B -OH
- C -CHO
- D -COOH
Explanation: Carboxylic acids contain the carboxyl group. Useful for: MDCAT 2027, NUMS 2027.
Question 71: The monomer of polythene is:
- A Propene
- B Styrene
- C Ethene
- D Vinyl chloride
Explanation: Polyethene is made from ethene. Useful for: MDCAT 2027, NUMS 2027.
Question 72: Which of the following is an alkali metal?
- A Magnesium
- B Calcium
- C Potassium
- D Aluminium
Explanation: Alkali metals are Group 1 elements. Useful for: MDCAT 2027, NUMS 2027.
Question 73: Transition elements are found in the:
- A d-block
- B p-block
- C f-block
- D s-block
Explanation: Transition metals fill the d orbitals. Useful for: MDCAT 2027, NUMS 2027.
Question 74: Which halogen is a liquid at room temperature?
- A Chlorine
- B Bromine
- C Fluorine
- D Iodine
Explanation: Bromine is a red-brown liquid. Useful for: MDCAT 2027, NUMS 2027.
Question 75: Which noble gas is used to fill balloons?
- A Helium
- B Neon
- C Krypton
- D Argon
Explanation: Helium is light and non-flammable. Useful for: MDCAT 2027, NUMS 2027.
Question 76: A catalyst increases the rate of reaction by:
- A Increasing ΔH
- B Lowering the activation energy
- C Shifting the equilibrium
- D Increasing yield
Explanation: It provides an alternative pathway with lower activation energy. Useful for: MDCAT 2027, NUMS 2027.
Question 77: The unit of the rate constant for a first-order reaction is:
- A mol s
- B L mol⁻¹ s⁻¹
- C s⁻¹
- D mol L⁻¹ s⁻¹
Explanation: For first order, k has units of time⁻¹. Useful for: MDCAT 2027, NUMS 2027.
Question 78: An exothermic reaction has:
- A A positive ΔH
- B Zero ΔH
- C A negative ΔH
- D Infinite ΔH
Explanation: Exothermic reactions release heat. Useful for: MDCAT 2027, NUMS 2027.
Question 79: Choose the correct word: She is ___ than her sister.
- A taller
- B more tall
- C most taller
- D tallest
Explanation: Use the comparative 'taller' with 'than'. Useful for: MDCAT 2027, NUMS 2027.
Question 80: Choose the correct form: He ___ to school every day.
- A going
- B go
- C gone
- D goes
Explanation: A singular subject takes 'goes'. Useful for: MDCAT 2027, NUMS 2027.
Question 81: Choose the correct verb: Neither the teacher nor the students ___ present.
- A were
- B is
- C has been
- D was
Explanation: The verb agrees with the nearer subject, 'students'. Useful for: MDCAT 2027, NUMS 2027.
Question 82: Choose the correct word: I have lived here ___ 2010.
- A from
- B at
- C for
- D since
Explanation: 'Since' is used with a point in time. Useful for: MDCAT 2027, NUMS 2027.
Question 83: Choose the correct plural of 'phenomenon'.
- A Phenomena
- B Phenomenas
- C Phenomenes
- D Phenomenons
Explanation: 'Phenomenon' takes a Greek plural. Useful for: MDCAT 2027, NUMS 2027.
Question 84: Choose the correct preposition: He is allergic ___ penicillin.
- A to
- B with
- C of
- D from
Explanation: 'Allergic to' is the correct collocation. Useful for: MDCAT 2027, NUMS 2027.
Question 85: Which of the following is a compound sentence?
- A I went home.
- B I wanted to go, but it rained.
- C Although it rained, I went home.
- D Walking fast, he reached early.
Explanation: A compound sentence joins two independent clauses. Useful for: MDCAT 2027, NUMS 2027.
Question 86: Choose the correct passive voice: 'They are building a bridge.'
- A A bridge was built by them.
- B A bridge is being built by them.
- C A bridge has been built by them.
- D A bridge is built by them.
Explanation: Present continuous passive is 'is/are being + past participle'. Useful for: MDCAT 2027, NUMS 2027.
Question 87: Choose the correct article: She is ___ MBBS student.
- A the
- B a
- C no article
- D an
Explanation: 'MBBS' starts with the vowel sound 'em'. Useful for: MDCAT 2027, NUMS 2027.
Question 88: What does 'to hit the nail on the head' mean?
- A To state exactly the right thing
- B To fail
- C To make noise
- D To hurt oneself
Explanation: It means to be precisely correct. Useful for: MDCAT 2027, NUMS 2027.
Question 89: Choose the correctly punctuated sentence.
- A It's a lovely day, isnt it?
- B Its a lovely day isn't it?
- C It's a lovely day, isn't it?
- D Its' a lovely day, isn't it
Explanation: Use 'It's' for 'it is' and an apostrophe in 'isn't'. Useful for: MDCAT 2027, NUMS 2027.
Question 90: Despite the heavy rain, the match ___ as scheduled.
- A has held
- B is holding
- C were held
- D was held
Explanation: The singular passive 'was held' fits the sentence. Useful for: MDCAT 2027, NUMS 2027.
Question 91: Choose the correctly spelt word:
- A Maintenence
- B Maintanence
- C Maintenance
- D Maintainance
Explanation: 'Maintenance' is the correct spelling. Useful for: MDCAT 2027, NUMS 2027.
Question 92: Choose the synonym of 'METICULOUS'.
- A Rude
- B Lazy
- C Careful
- D Careless
Explanation: Meticulous means showing great attention to detail. Useful for: MDCAT 2027, NUMS 2027.
Question 93: Choose the antonym of 'SCARCE'.
- A Rare
- B Limited
- C Abundant
- D Few
Explanation: Scarce means in short supply. Useful for: MDCAT 2027, NUMS 2027.
Question 94: 'Ubiquitous' means:
- A Rare
- B Ancient
- C Present everywhere
- D Hidden
Explanation: Ubiquitous describes something found everywhere. Useful for: MDCAT 2027, NUMS 2027.
Question 95: 'Candour' means:
- A Sweetness
- B Frankness
- C Secrecy
- D Cruelty
Explanation: Candour is honesty in speech. Useful for: MDCAT 2027, NUMS 2027.
Question 96: Choose the correct word: The doctor will ___ the patient's condition.
- A access
- B excess
- C asses
- D assess
Explanation: 'Assess' means to evaluate. Useful for: MDCAT 2027, NUMS 2027.
Question 97: A person who studies stars and planets is called an:
- A Botanist
- B Astronomer
- C Zoologist
- D Geologist
Explanation: Astronomy is the science of celestial bodies. Useful for: MDCAT 2027, NUMS 2027.
Question 98: In medicine, 'benign' is the opposite of:
- A Gentle
- B Malignant
- C Kind
- D Harmless
Explanation: A benign tumour is non-cancerous; malignant is cancerous. Useful for: MDCAT 2027, NUMS 2027.
Question 99: Stethoscope : Doctor :: Telescope : ?
- A Astronomer
- B Chemist
- C Pilot
- D Farmer
Explanation: A telescope is a tool used by an astronomer. Useful for: MDCAT 2027, NUMS 2027.
Question 100: A is the sister of B, and B is the father of C. How is A related to C?
- A Sister
- B Cousin
- C Mother
- D Aunt
Explanation: A is the paternal aunt of C. Useful for: MDCAT 2027, NUMS 2027.
Frequently Asked Questions
How many Bioenergetics MCQs are available on TestMasterMCQs?
There are currently 148 Bioenergetics MCQs on this page, each with four options, the correct answer and a short explanation to help you understand the concept — not just memorise the answer.
Are these Bioenergetics MCQs useful for PPSC, FPSC, NTS, CSS and MDCAT?
Yes — our Bioenergetics questions follow the syllabus of common Pakistani competitive exams including CSS, PMS, PPSC, FPSC, NTS, and university entry tests like MDCAT and ECAT.
How should I practice Bioenergetics MCQs for better retention?
Attempt 15–20 questions at a time, read the explanation after every question (even the ones you get right), and revisit wrong answers after 24 hours to reinforce memory.