Biochemistry

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Biochemistry MCQ & Objective Questions

Biochemistry is a crucial subject for students aspiring to excel in their school exams and competitive tests. Understanding the biochemical processes that underpin life is essential for scoring well. Practicing MCQs and objective questions in Biochemistry not only enhances your grasp of the subject but also boosts your confidence during exams. Engaging with these practice questions helps in identifying important concepts and prepares you effectively for various assessments.

What You Will Practise Here

  • Fundamental concepts of biomolecules: carbohydrates, proteins, lipids, and nucleic acids.
  • Metabolic pathways: glycolysis, Krebs cycle, and oxidative phosphorylation.
  • Enzyme kinetics and regulation: understanding enzyme activity and factors affecting it.
  • Cellular respiration and photosynthesis: key processes in energy production.
  • Biochemical techniques: chromatography, electrophoresis, and spectrophotometry.
  • Genetic information flow: DNA replication, transcription, and translation.
  • Important biochemical equations and their applications in real-life scenarios.

Exam Relevance

Biochemistry is a significant part of the curriculum for CBSE, State Boards, NEET, and JEE. It often appears in the form of direct questions, application-based scenarios, and conceptual MCQs. Students can expect questions that assess their understanding of metabolic pathways, enzyme functions, and the role of biomolecules in living organisms. Familiarity with common question patterns, such as multiple-choice questions that require critical thinking, is essential for success in these exams.

Common Mistakes Students Make

  • Confusing the structures and functions of different biomolecules.
  • Misunderstanding metabolic pathways and their regulatory mechanisms.
  • Neglecting the importance of diagrams and flowcharts in explaining biochemical processes.
  • Overlooking the significance of enzyme kinetics in practical applications.

FAQs

Question: What are some effective ways to study Biochemistry for exams?
Answer: Focus on understanding key concepts, practice MCQs regularly, and use diagrams to visualize processes.

Question: How can I improve my performance in Biochemistry MCQs?
Answer: Regular practice of objective questions and reviewing common mistakes will enhance your exam readiness.

Start solving Biochemistry MCQs today to test your understanding and solidify your knowledge. Remember, consistent practice is the key to mastering this vital subject and achieving your academic goals!

Q. Which application is NOT commonly associated with PCR?
  • A. Genetic testing
  • B. Forensic analysis
  • C. Protein synthesis
  • D. Pathogen detection
Q. Which autoimmune disease is characterized by dry eyes and dry mouth due to the immune system attacking exocrine glands?
  • A. Sjögren's Syndrome
  • B. Rheumatoid Arthritis
  • C. Systemic Lupus Erythematosus
  • D. Ankylosing Spondylitis
Q. Which autoimmune disease is characterized by the presence of anti-citrullinated protein antibodies (ACPAs)?
  • A. Rheumatoid Arthritis
  • B. Systemic Lupus Erythematosus
  • C. Ankylosing Spondylitis
  • D. Psoriatic Arthritis
Q. Which autoimmune disorder is associated with the overproduction of thyroid hormones?
  • A. Hashimoto's Thyroiditis
  • B. Graves' Disease
  • C. Sjögren's Syndrome
  • D. Celiac Disease
Q. Which base pairs with adenine in DNA?
  • A. Thymine
  • B. Cytosine
  • C. Guanine
  • D. Uracil
Q. Which bond is responsible for the primary structure of peptides?
  • A. Hydrogen bonds
  • B. Ionic bonds
  • C. Peptide bonds
  • D. Disulfide bonds
Q. Which cells are primarily involved in the humoral immune response?
  • A. T cells
  • B. B cells
  • C. Macrophages
  • D. Natural killer cells
Q. Which cells are primarily involved in the innate immune response?
  • A. B cells
  • B. T cells
  • C. Macrophages
  • D. Plasma cells
Q. Which complex in the electron transport chain is responsible for pumping protons into the intermembrane space?
  • A. Complex I
  • B. Complex II
  • C. Complex III
  • D. Complex IV
Q. Which component is essential for a UV luminance spectroscopy setup?
  • A. Spectrophotometer
  • B. Fluorometer
  • C. Chromatograph
  • D. Microscope
Q. Which component is essential for the separation process in HPLC?
  • A. Detector
  • B. Mobile phase
  • C. Sample injector
  • D. Column
Q. Which component of chromatography is responsible for the separation of compounds?
  • A. Mobile phase
  • B. Stationary phase
  • C. Detector
  • D. Sample injector
Q. Which component of FTIR spectroscopy is responsible for detecting the infrared light?
  • A. Laser
  • B. Photodetector
  • C. Sample holder
  • D. Computer
Q. Which component of the cell membrane is primarily responsible for fluidity?
  • A. Cholesterol
  • B. Proteins
  • C. Carbohydrates
  • D. Phospholipids
Q. Which component of the cell membrane is primarily responsible for its fluidity?
  • A. Proteins
  • B. Carbohydrates
  • C. Phospholipids
  • D. Cholesterol
Q. Which component of the gas chromatography system is responsible for vaporizing the sample?
  • A. Injector
  • B. Column
  • C. Detector
  • D. Carrier gas
Q. Which compound is regenerated at the end of the TCA cycle?
  • A. Acetyl-CoA
  • B. Citrate
  • C. Oxaloacetate
  • D. Alpha-ketoglutarate
Q. Which condition can inhibit oxidative phosphorylation?
  • A. High oxygen levels
  • B. Low glucose levels
  • C. Presence of cyanide
  • D. High ATP levels
Q. Which condition can lead to protein aggregation and loss of function?
  • A. High salt concentration
  • B. Low pH
  • C. High temperature
  • D. All of the above
Q. Which cytokine is primarily involved in the regulation of immune responses?
  • A. Interferon
  • B. Histamine
  • C. Prostaglandin
  • D. Serotonin
Q. Which cytokine is primarily responsible for activating T cells?
  • A. Interleukin-1
  • B. Interleukin-2
  • C. Tumor necrosis factor
  • D. Interferon-gamma
Q. Which disease is characterized by chronic inflammation of the joints and is classified as an autoimmune disorder?
  • A. Rheumatoid Arthritis
  • B. Osteoarthritis
  • C. Gout
  • D. Fibromyalgia
Q. Which disease is primarily caused by the destruction of insulin-producing beta cells in the pancreas?
  • A. Celiac Disease
  • B. Type 1 Diabetes
  • C. Graves' Disease
  • D. Hashimoto's Thyroiditis
Q. Which enzyme catalyzes the conversion of citrate to isocitrate?
  • A. Citrate synthase
  • B. Aconitase
  • C. Isocitrate dehydrogenase
  • D. Alpha-ketoglutarate dehydrogenase
Q. Which enzyme catalyzes the conversion of glucose to glucose-6-phosphate in glycolysis?
  • A. Hexokinase
  • B. Phosphofructokinase
  • C. Pyruvate kinase
  • D. Aldolase
Q. Which enzyme catalyzes the first step of the urea cycle?
  • A. Carbamoyl phosphate synthetase
  • B. Ornithine transcarbamylase
  • C. Arginase
  • D. Argininosuccinate synthetase
Q. Which enzyme initiates the process of fatty acid oxidation?
  • A. Acetyl-CoA carboxylase
  • B. Carnitine acyltransferase
  • C. Fatty acyl-CoA synthetase
  • D. Beta-hydroxyacyl-CoA dehydrogenase
Q. Which enzyme is commonly used to cut DNA at specific sequences in recombinant DNA technology?
  • A. DNA polymerase
  • B. Ligase
  • C. Restriction endonuclease
  • D. Helicase
Q. Which enzyme is involved in the digestion of carbohydrates?
  • A. Pepsin
  • B. Amylase
  • C. Lipase
  • D. Trypsin
Q. Which enzyme is responsible for breaking down hydrogen peroxide in cells?
  • A. Catalase
  • B. Amylase
  • C. Lipase
  • D. Protease
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