Medical Science MCQ & Objective Questions
Medical Science is a crucial subject for students aspiring to excel in their school and competitive exams. Understanding key concepts and practicing MCQs can significantly enhance your exam preparation. By solving objective questions, you can identify important topics and improve your chances of scoring better in exams.
What You Will Practise Here
Fundamentals of Human Anatomy and Physiology
Key Concepts in Microbiology and Immunology
Essential Definitions and Terminology in Medical Science
Important Diagrams related to Body Systems
Pathology and Disease Mechanisms
Pharmacology Basics and Drug Classifications
Common Medical Procedures and Their Implications
Exam Relevance
Medical Science is a significant part of the curriculum for CBSE, State Boards, NEET, and JEE exams. Questions often focus on understanding human body systems, disease processes, and medical terminology. Common patterns include multiple-choice questions that test both theoretical knowledge and practical application, making it essential to be well-prepared with important Medical Science MCQ questions.
Common Mistakes Students Make
Overlooking the importance of diagrams in understanding anatomy.
Confusing similar terms in pharmacology and their applications.
Neglecting to connect theoretical concepts with practical scenarios.
Misinterpreting questions due to lack of careful reading.
FAQs
Question: What are the best ways to prepare for Medical Science MCQs?Answer: Regular practice of objective questions, reviewing key concepts, and understanding diagrams are effective strategies.
Question: How can I improve my score in Medical Science exams?Answer: Focus on solving practice questions and revising important topics consistently.
Now is the time to enhance your understanding of Medical Science! Dive into our practice MCQs and test your knowledge to ensure you are well-prepared for your exams. Remember, consistent practice leads to success!
Q. Which process converts glucose into ATP in the presence of oxygen?
A.
Fermentation
B.
Glycolysis
C.
Aerobic respiration
D.
Anaerobic respiration
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Solution
Aerobic respiration is the process that converts glucose into ATP using oxygen.
Correct Answer:
C
— Aerobic respiration
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Q. Which process converts glucose into pyruvate?
A.
Glycolysis
B.
Krebs cycle
C.
Oxidative phosphorylation
D.
Fermentation
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Solution
Glycolysis is the metabolic pathway that converts glucose into pyruvate, producing ATP and NADH in the process.
Correct Answer:
A
— Glycolysis
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Q. Which process directly produces ATP during fatty acid oxidation?
A.
Beta-oxidation
B.
Glycolysis
C.
Citric Acid Cycle
D.
Electron Transport Chain
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Solution
Beta-oxidation is the process that breaks down fatty acids to produce acetyl-CoA, which enters the citric acid cycle for ATP production.
Correct Answer:
A
— Beta-oxidation
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Q. Which process do microbes use to produce vinegar?
A.
Anaerobic respiration
B.
Aerobic respiration
C.
Fermentation
D.
Photosynthesis
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Solution
Aerobic respiration is used by acetic acid bacteria to convert ethanol into acetic acid, producing vinegar.
Correct Answer:
B
— Aerobic respiration
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Q. Which process ensures the accuracy of DNA replication?
A.
Transcription
B.
Proofreading
C.
Translation
D.
Splicing
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Solution
Proofreading by DNA polymerase ensures the accuracy of DNA replication by correcting errors.
Correct Answer:
B
— Proofreading
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Q. Which process involves the conversion of DNA to RNA?
A.
Transcription
B.
Translation
C.
Replication
D.
Translocation
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Solution
Transcription is the process by which the information in a DNA sequence is copied into a complementary RNA sequence.
Correct Answer:
A
— Transcription
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Q. Which process involves the decoding of mRNA to synthesize proteins?
A.
Transcription
B.
Translation
C.
Replication
D.
Splicing
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Solution
Translation is the process where ribosomes decode mRNA to synthesize proteins.
Correct Answer:
B
— Translation
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Q. Which process involves the removal of an amino group from an amino acid?
A.
Transamination
B.
Deamination
C.
Decarboxylation
D.
Condensation
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Solution
Deamination is the process of removing an amino group from an amino acid, resulting in the formation of ammonia.
Correct Answer:
B
— Deamination
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Q. Which process involves the transfer of genetic material between bacteria through direct contact?
A.
Transformation
B.
Transduction
C.
Conjugation
D.
Replication
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Solution
Conjugation is the process where genetic material is transferred between bacteria through direct contact, typically via a pilus.
Correct Answer:
C
— Conjugation
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Q. Which process involves the uptake of naked DNA by a bacterial cell?
A.
Transduction
B.
Conjugation
C.
Transformation
D.
Binary fission
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Solution
Transformation is the process where bacteria take up naked DNA from their environment.
Correct Answer:
C
— Transformation
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Q. Which process is commonly used to remove suspended solids from water?
A.
Filtration
B.
Chlorination
C.
Fluoridation
D.
Sedimentation
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Solution
Filtration is the process used to remove suspended solids from water.
Correct Answer:
A
— Filtration
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Q. Which process is essential for creating synthetic seeds?
A.
Photosynthesis
B.
Micropropagation
C.
Grafting
D.
Hybridization
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Solution
Micropropagation is essential for creating synthetic seeds, as it involves growing plant tissues in a controlled environment.
Correct Answer:
B
— Micropropagation
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Q. Which process is primarily carried out by soil microorganisms?
A.
Photosynthesis
B.
Nitrification
C.
Transpiration
D.
Evaporation
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Solution
Nitrification is a key process carried out by soil microorganisms, converting ammonia to nitrates.
Correct Answer:
B
— Nitrification
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Q. Which process is primarily used to remove suspended solids from wastewater?
A.
Sedimentation
B.
Filtration
C.
Chlorination
D.
Aeration
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Solution
Sedimentation is primarily used to remove suspended solids from wastewater by allowing them to settle at the bottom of a tank.
Correct Answer:
A
— Sedimentation
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Q. Which process occurs first during the initiation of translation?
A.
Binding of the ribosome to mRNA
B.
tRNA binding to the start codon
C.
Formation of the peptide bond
D.
Release of the completed polypeptide
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Solution
The binding of the ribosome to mRNA occurs first during the initiation of translation.
Correct Answer:
A
— Binding of the ribosome to mRNA
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Q. Which process occurs in the absence of oxygen and produces lactic acid?
A.
Aerobic respiration
B.
Glycolysis
C.
Lactic acid fermentation
D.
Krebs cycle
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Solution
Lactic acid fermentation occurs in the absence of oxygen and produces lactic acid.
Correct Answer:
C
— Lactic acid fermentation
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Q. Which process occurs in the chloroplasts of plant cells?
A.
Cellular respiration
B.
Photosynthesis
C.
Nitrogen fixation
D.
Fermentation
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Solution
Photosynthesis occurs in the chloroplasts, where light energy is converted into chemical energy.
Correct Answer:
B
— Photosynthesis
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Q. Which process occurs in the mitochondria?
A.
Photosynthesis
B.
Glycolysis
C.
Krebs Cycle
D.
Fermentation
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Solution
The Krebs Cycle occurs in the mitochondria as part of cellular respiration.
Correct Answer:
C
— Krebs Cycle
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Q. Which process primarily drives the movement of water in plants?
A.
Diffusion
B.
Osmosis
C.
Active transport
D.
Transpiration
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Solution
Transpiration creates a negative pressure in the leaves, which helps pull water upward through the xylem.
Correct Answer:
D
— Transpiration
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Q. Which process results in the formation of gametes with half the number of chromosomes?
A.
Mitosis
B.
Meiosis
C.
Fertilization
D.
Binary fission
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Solution
Meiosis is the process that reduces the chromosome number by half, producing gametes for sexual reproduction.
Correct Answer:
B
— Meiosis
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Q. Which property of peptides is influenced by the side chains of amino acids?
A.
Primary structure
B.
Secondary structure
C.
Tertiary structure
D.
Quaternary structure
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Solution
The side chains (R groups) of amino acids influence the folding and interactions that determine the tertiary structure of peptides.
Correct Answer:
C
— Tertiary structure
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Q. Which protein binds to the operator region of the lac operon?
A.
RNA polymerase
B.
Lac repressor
C.
cAMP receptor protein
D.
Beta-galactosidase
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Solution
The lac repressor binds to the operator region of the lac operon, preventing transcription of downstream genes when lactose is absent.
Correct Answer:
B
— Lac repressor
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Q. Which protein is primarily involved in the unwinding of DNA during replication?
A.
DNA polymerase
B.
Helicase
C.
Ligase
D.
Topoisomerase
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Solution
Helicase is the enzyme responsible for unwinding the DNA double helix during replication, allowing access for other proteins.
Correct Answer:
B
— Helicase
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Q. Which protozoan is commonly associated with sleeping sickness?
A.
Giardia lamblia
B.
Plasmodium vivax
C.
Trypanosoma brucei
D.
Leishmania donovani
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Solution
Trypanosoma brucei is the causative agent of sleeping sickness, transmitted by tsetse flies.
Correct Answer:
C
— Trypanosoma brucei
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Q. Which protozoan is known to cause severe dehydration in children due to diarrhea?
A.
Cryptosporidium parvum
B.
Entamoeba histolytica
C.
Giardia lamblia
D.
Balantidium coli
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Solution
Cryptosporidium parvum can cause severe diarrhea leading to dehydration, especially in children.
Correct Answer:
A
— Cryptosporidium parvum
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Q. Which reflex is an example of a monosynaptic reflex?
A.
Withdrawal reflex
B.
Knee-jerk reflex
C.
Pupillary reflex
D.
Crossed extensor reflex
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Solution
The knee-jerk reflex is an example of a monosynaptic reflex, involving only one synapse between the sensory and motor neurons.
Correct Answer:
B
— Knee-jerk reflex
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Q. Which reflex is responsible for maintaining posture?
A.
Stretch reflex
B.
Withdrawal reflex
C.
Crossed extensor reflex
D.
Pupillary reflex
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Solution
The stretch reflex is responsible for maintaining posture by adjusting muscle tension in response to changes in muscle length.
Correct Answer:
A
— Stretch reflex
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Q. Which regulatory body oversees the use of transgenic animals in research in the United States?
A.
FDA
B.
USDA
C.
EPA
D.
NIH
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Solution
The USDA (United States Department of Agriculture) oversees the use of transgenic animals in research, along with other regulatory bodies.
Correct Answer:
B
— USDA
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Q. Which RNA molecule carries the genetic information from DNA to the ribosome?
A.
tRNA
B.
rRNA
C.
mRNA
D.
snRNA
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Solution
mRNA (messenger RNA) carries the genetic information from DNA to the ribosome for protein synthesis.
Correct Answer:
C
— mRNA
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Q. Which seafood is considered a good source of protein and low in calories?
A.
Shrimp
B.
Crab
C.
Lobster
D.
All of the above
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Solution
All of these seafood options are high in protein and low in calories, making them healthy choices.
Correct Answer:
D
— All of the above
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