Practice 50 Bioenergetics MCQs
Question 1: The oxygen released during photosynthesis comes from:
- A Glucose
- B Chlorophyll
- C Carbon dioxide
- D Water
Explanation: Photolysis of water releases oxygen. Useful for: NUMS 2027, MDCAT 2027.
Question 2: Which of the following is a non-reducing sugar?
- A Fructose
- B Sucrose
- C Glucose
- D Maltose
Explanation: In sucrose both anomeric carbons are tied in the glycosidic bond. Useful for: NUMS 2027, MDCAT 2027.
Question 3: Which organelle is the site of lipid synthesis and detoxification?
- A Lysosome
- B Golgi apparatus
- C Rough endoplasmic reticulum
- D Smooth endoplasmic reticulum
Explanation: Smooth ER lacks ribosomes and handles lipids and detoxification. Useful for: NUMS 2027, MDCAT 2027.
Question 4: Which cell structures form the spindle fibres during cell division?
- A Intermediate filaments
- B Ribosomes
- C Microfilaments
- D Microtubules
Explanation: Spindle fibres are made of microtubules. Useful for: NUMS 2027, MDCAT 2027.
Question 5: The process by which a cell engulfs solid particles is called:
- A Pinocytosis
- B Osmosis
- C Phagocytosis
- D Diffusion
Explanation: Phagocytosis means 'cell eating'. Useful for: NUMS 2027, MDCAT 2027.
Question 6: Which type of RNA carries amino acids to the ribosome?
- A rRNA
- B tRNA
- C mRNA
- D snRNA
Explanation: Transfer RNA delivers amino acids during translation. Useful for: NUMS 2027, MDCAT 2027.
Question 7: Which enzyme joins Okazaki fragments?
- A Helicase
- B Primase
- C DNA ligase
- D Topoisomerase
Explanation: DNA ligase seals gaps on the lagging strand. Useful for: NUMS 2027, MDCAT 2027.
Question 8: Deficiency of which vitamin causes night blindness?
- A Vitamin D
- B Vitamin A
- C Vitamin C
- D Vitamin B1
Explanation: Vitamin A is needed for rhodopsin in the retina. Useful for: NUMS 2027, MDCAT 2027.
Question 9: Which blood group has no antigens on its red blood cells?
- A Group AB
- B Group O
- C Group A
- D Group B
Explanation: Group O cells lack A and B antigens. Useful for: NUMS 2027, MDCAT 2027.
Question 10: Which hormone raises blood glucose levels?
- A Calcitonin
- B Insulin
- C Oxytocin
- D Glucagon
Explanation: Glucagon from alpha cells raises blood sugar. Useful for: NUMS 2027, MDCAT 2027.
Question 11: Which part of the brain regulates body temperature and hunger?
- A Medulla oblongata
- B Cerebellum
- C Cerebrum
- D Hypothalamus
Explanation: The hypothalamus maintains homeostasis. Useful for: NUMS 2027, MDCAT 2027.
Question 12: The structural and functional unit of the nervous system is the:
- A Synapse
- B Neuroglia
- C Nephron
- D Neuron
Explanation: Neurons transmit nerve impulses. Useful for: NUMS 2027, MDCAT 2027.
Question 13: In humans, fertilization usually occurs in the:
- A Vagina
- B Fallopian tube
- C Uterus
- D Ovary
Explanation: Fertilization normally takes place in the ampulla of the oviduct. Useful for: NUMS 2027, MDCAT 2027.
Question 14: The finger-like projections lining the small intestine are called:
- A Cilia
- B Rugae
- C Villi
- D Alveoli
Explanation: Villi increase surface area for absorption. Useful for: NUMS 2027, MDCAT 2027.
Question 15: Which antibody class is produced first in a primary immune response?
- A IgG
- B IgA
- C IgM
- D IgE
Explanation: IgM is the first antibody made after infection. Useful for: NUMS 2027, MDCAT 2027.
Question 16: Which of the following is a strong acid?
- A Carbonic acid
- B Hydrochloric acid
- C Citric acid
- D Acetic acid
Explanation: HCl dissociates completely in water. Useful for: NUMS 2027, MDCAT 2027.
Question 17: The pOH of a solution with pH 4 is:
- A 4
- B 7
- C 14
- D 10
Explanation: pH + pOH = 14. Useful for: NUMS 2027, MDCAT 2027.
Question 18: The atomic number of oxygen is:
- A 6
- B 10
- C 16
- D 8
Explanation: Oxygen has 8 protons. Useful for: NUMS 2027, MDCAT 2027.
Question 19: Which element has the configuration 1s² 2s² 2p⁶ 3s² 3p⁵?
- A Chlorine
- B Fluorine
- C Sulphur
- D Argon
Explanation: This configuration has 17 electrons. Useful for: NUMS 2027, MDCAT 2027.
Question 20: The hybridisation of carbon in ethene (C₂H₄) is:
- A sp
- B sp²
- C sp³d
- D sp³
Explanation: Each carbon forms three sigma bonds and one pi bond. Useful for: NUMS 2027, MDCAT 2027.
Question 21: The bond angle in methane is:
- A 120°
- B 180°
- C 109.5°
- D 90°
Explanation: Methane is tetrahedral. Useful for: NUMS 2027, MDCAT 2027.
Question 22: The oxidation state of oxygen in hydrogen peroxide (H₂O₂) is:
- A +1
- B −2
- C −1
Explanation: Peroxides contain O–O bonds, giving −1. Useful for: NUMS 2027, MDCAT 2027.
Question 23: According to Avogadro's hypothesis, equal volumes of gases at the same T and P contain equal numbers of:
- A Atoms
- B Protons
- C Grams
- D Molecules
Explanation: Avogadro's law links volume to the number of molecules. Useful for: NUMS 2027, MDCAT 2027.
Question 24: Which law relates the solubility of a gas to its pressure?
- A Raoult's law
- B Henry's law
- C Graham's law
- D Dalton's law
Explanation: Gas solubility is proportional to its partial pressure. Useful for: NUMS 2027, MDCAT 2027.
Question 25: Which law governs the rate of diffusion of gases?
- A Charles's law
- B Boyle's law
- C Graham's law
- D Henry's law
Explanation: Rate is inversely proportional to the square root of molar mass. Useful for: NUMS 2027, MDCAT 2027.
Question 26: Which gas turns lime water milky?
- A Carbon dioxide
- B Nitrogen
- C Hydrogen
- D Oxygen
Explanation: CO₂ forms insoluble calcium carbonate. Useful for: NUMS 2027, MDCAT 2027.
Question 27: The IUPAC name of CH₃COOH is:
- A Methanoic acid
- B Propanoic acid
- C Ethanoic acid
- D Ethanol
Explanation: Two carbons with a carboxyl group give ethanoic acid. Useful for: NUMS 2027, MDCAT 2027.
Question 28: The compound CH₃COCH₃ is commonly called:
- A Acetone
- B Propanal
- C Acetaldehyde
- D Ethanol
Explanation: It is propanone, a ketone. Useful for: NUMS 2027, MDCAT 2027.
Question 29: Which of the following is an aromatic compound?
- A Hexane
- B Ethene
- C Benzene
- D Cyclohexane
Explanation: Benzene has a delocalised π system. Useful for: NUMS 2027, MDCAT 2027.
Question 30: Choose the correct word: The committee ___ its decision yesterday.
- A announce
- B announcing
- C announces
- D announced
Explanation: Yesterday needs the simple past tense. Useful for: NUMS 2027, MDCAT 2027.
Question 31: Choose the correctly spelt word (an event).
- A Occurrance
- B Occurrence
- C Ocurrence
- D Occurence
Explanation: 'Occurrence' has double c and double r. Useful for: NUMS 2027, MDCAT 2027.
Question 32: Choose the synonym of 'ABANDON'.
- A Support
- B Keep
- C Desert
- D Protect
Explanation: To abandon is to leave behind. Useful for: NUMS 2027, MDCAT 2027.
Question 33: Choose the antonym of 'TRANSPARENT'.
- A Opaque
- B Thin
- C Visible
- D Clear
Explanation: Opaque blocks light. Useful for: NUMS 2027, MDCAT 2027.
Question 34: If 4 pencils cost Rs 20, how much do 9 pencils cost?
- A Rs 36
- B Rs 40
- C Rs 45
- D Rs 50
Explanation: One pencil costs Rs 5. Useful for: NUMS 2027, MDCAT 2027.
Question 35: Find the next number: 1, 3, 6, 10, 15, ?
- A 25
- B 18
- C 20
- D 21
Explanation: These are triangular numbers; the next difference is 6. Useful for: NUMS 2027, MDCAT 2027.
Question 36: Choose the odd one out: Mercury, Venus, Moon, Mars
- A Venus
- B Mars
- C Moon
- D Mercury
Explanation: The Moon is a satellite; the others are planets. Useful for: NUMS 2027, MDCAT 2027.
Question 37: The SI unit of potential difference is the:
- A Ohm
- B Coulomb
- C Ampere
- D Volt
Explanation: Potential difference is measured in volts. Useful for: NUMS 2027, MDCAT 2027.
Question 38: The frequency of AC mains electricity in Pakistan is:
- A 100 Hz
- B 60 Hz
- C 50 Hz
- D 25 Hz
Explanation: Pakistan uses 50 Hz supply. Useful for: NUMS 2027, MDCAT 2027.
Question 39: Which instrument is used to measure electric current?
- A Voltmeter
- B Ohmmeter
- C Barometer
- D Ammeter
Explanation: An ammeter is connected in series. Useful for: NUMS 2027, MDCAT 2027.
Question 40: The potential difference across a 10 Ω resistor carrying 2 A is:
- A 20 V
- B 12 V
- C 5 V
- D 0.2 V
Explanation: V = IR = 2 × 10. Useful for: NUMS 2027, MDCAT 2027.
Question 41: The SI unit of inductance is the:
- A Henry
- B Tesla
- C Weber
- D Farad
Explanation: Inductance is measured in henrys. Useful for: NUMS 2027, MDCAT 2027.
Question 42: Lenz's law is a consequence of the conservation of:
- A Mass
- B Energy
- C Charge
- D Momentum
Explanation: The induced current opposes the change that causes it. Useful for: NUMS 2027, MDCAT 2027.
Question 43: Rutherford's atomic model was based on the scattering of:
- A Alpha particles
- B Neutrons
- C Gamma rays
- D Beta particles
Explanation: Alpha scattering revealed the nucleus. Useful for: NUMS 2027, MDCAT 2027.
Question 44: The SI unit of radioactivity is the:
- A Henry
- B Becquerel
- C Sievert
- D Gray
Explanation: 1 Bq = one decay per second. Useful for: NUMS 2027, MDCAT 2027.
Question 45: Which colour of visible light has the longest wavelength?
- A Blue
- B Green
- C Violet
- D Red
Explanation: Red has the longest wavelength and lowest frequency. Useful for: NUMS 2027, MDCAT 2027.
Question 46: The time period of a simple pendulum depends on its:
- A Colour of the bob
- B Shape of the bob
- C Mass of the bob
- D Length
Explanation: T = 2π√(L/g). Useful for: NUMS 2027, MDCAT 2027.
Question 47: Which physical quantity is measured in pascals?
- A Force
- B Energy
- C Power
- D Pressure
Explanation: 1 Pa = 1 N/m². Useful for: NUMS 2027, MDCAT 2027.
Question 48: Hooke's law relates the applied force to the:
- A Extension of a spring
- B Speed
- C Mass of the spring
- D Temperature
Explanation: F = kx within the elastic limit. Useful for: NUMS 2027, MDCAT 2027.
Question 49: The frequency of a wave with a time period of 0.02 s is:
- A 0.02 Hz
- B 5 Hz
- C 500 Hz
- D 50 Hz
Explanation: f = 1/T = 50 Hz. Useful for: NUMS 2027, MDCAT 2027.
Question 50: The kinetic energy of a 2 kg body moving at 3 m/s is:
- A 3 J
- B 6 J
- C 18 J
- D 9 J
Explanation: KE = ½ × 2 × 3² = 9 J. Useful for: NUMS 2027, MDCAT 2027.
Frequently Asked Questions
How many Bioenergetics MCQs are available on TestMasterMCQs?
There are currently 50 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.