Plus study IQ

24. Which biomolecule serves as the primary source of energy for the body? a) Proteins b) Carbohydrates c) Nucleic acids d) Lipids Answer: b) Carbohydrates 25. Which vitamin is necessary for the absorption of calcium? a) Vitamin A b) Vitamin B12 c) Vitamin D d) Vitamin K Answer: c) Vitamin D 26. Which amino acid is essential and cannot be synthesized by the body? a) Glycine b) Alanine c) Leucine d) Serine Answer: c) Leucine 27. What is the primary function of cholesterol in the body? a) Energy storage b) Hormone production c) Structural component of cell membranes d) All of the above Answer: d) All of the above 28. Which of the following is a ketone body? a) Acetyl-CoA b) Beta-hydroxybutyrate c) Lactic acid d) Pyruvate Answer: b) Beta-hydroxybutyrate 29. What is the role of enzymes in biochemical reactions? a) To increase activation energy b) To decrease reaction rates c) To act as catalysts d) To provide energy Answer: c) To act as catalysts 30. Which type of RNA is responsible for carrying amino acids to the ribosome? a) mRNA b) rRNA c) tRNA d) siRNA Answer: c) tRNA Pathology 31. What type of necrosis is characterized by the transformation of tissue into a cheese-like substance? a) Coagulative necrosis b) Caseous necrosis c) Liquefactive necrosis d) Fat necrosis Answer: b) Caseous necrosis 32. Which of the following conditions is characterized by the presence of Reed-Sternberg cells? a) Non-Hodgkin lymphoma b) Hodgkin lymphoma c) Acute lymphoblastic leukemia d) Chronic myeloid leukemia Answer: b) Hodgkin lymphoma 33. What is the primary feature of chronic inflammation? a) Presence of neutrophils b) Formation of granulomas c) Tissue necrosis d) Swelling and redness Answer: b) Formation of granulomas 34. Which type of cell is primarily involved in the immune response? a) Erythrocytes b) Lymphocytes c) Neutrophils d) Platelets Answer: b) Lymphocytes 35. Which marker is used to diagnose prostate cancer? a) CA-125 b) AFP c) PSA d) CEA Answer: c) PSA 36. What is the most common type of skin cancer? a) Melanoma

Here are 100 mixed multiple-choice questions (MCQs) covering various subjects relevant to lab technicians: Hematology 1. What is the main function of hemoglobin in red blood cells? a) Clotting b) Oxygen transport c) Immune response d) Nutrient absorption Answer: b) Oxygen transport 2. Which of the following is the most common type of white blood cell? a) Neutrophils b) Eosinophils c) Basophils d) Lymphocytes Answer: a) Neutrophils 3. What is the primary cause of iron deficiency anemia? a) Vitamin B12 deficiency b) Chronic blood loss c) Overproduction of red blood cells d) Dehydration Answer: b) Chronic blood loss 4. Which test measures the percentage of red blood cells in blood? a) Hemoglobin test b) Hematocrit test c) Complete blood count d) Reticulocyte count Answer: b) Hematocrit test 5. What is the lifespan of platelets in the bloodstream? a) 1-2 days b) 5-10 days c) 10-15 days d) 20-30 days Answer: b) 5-10 days 6. Which condition is characterized by an increased number of eosinophils? a) Leukemia b) Allergic reactions c) Viral infections d) Bacterial infections Answer: b) Allergic reactions 7. Which vitamin is essential for the synthesis of clotting factors? a) Vitamin A b) Vitamin C c) Vitamin D d) Vitamin K Answer: d) Vitamin K 8. What is the primary cause of thrombocytopenia? a) Increased production of platelets b) Decreased production of red blood cells c) Increased destruction of platelets d) Dehydration Answer: c) Increased destruction of platelets 9. Which of the following indicates a high level of bilirubin in the blood? a) Hemolysis b) Liver dysfunction c) Bile duct obstruction d) All of the above Answer: d) All of the above 10. What does a low reticulocyte count indicate? a) Increased production of red blood cells b) Decreased production of red blood cells c) Normal red blood cell production d) Increased destruction of red blood cells Answer: b) Decreased production of red blood cells Microbiology 11. Which of the following is a common cause of urinary tract infections? a) Staphylococcus aureus b) Escherichia coli c) Streptococcus pneumoniae d) Clostridium botulinum Answer: b) Escherichia coli 12. Which type of bacteria retains the crystal violet stain during the Gram staining procedure? a) Gram-positive b) Gram-negative c) Acid-fast d) Non-staining Answer: a) Gram-positive 13. What type of bacteria require oxygen to grow? a) Anaerobes b) Aerobes c) Facultative anaerobes d) Microaerophiles Answer: b) Aerobes 14. Which of the following bacteria is known to cause tuberculosis? a) Mycobacterium leprae b) Mycobacterium tuberculosis c) Streptococcus pneumoniae d) Neisseria gonorrhoeae Answer: b) Mycobacterium tuberculosis 15. What is the primary mode of action of penicillin? a) Inhibition of protein synthesis b) Disruption of cell wall synthesis c) Inhibition of nucleic acid synthesis d) Alteration of cell membrane permeability Answer: b) Disruption of cell wall synthesis 16. Which type of virus is responsible for the common cold? a) Retrovirus b) Adenovirus c) Rhinovirus d) Herpesvirus Answer: c) Rhinovirus 17. Which laboratory technique is commonly used for the identification of bacterial pathogens? a) PCR b) ELISA c) Western blot d) Gram staining Answer: d) Gram staining 18. Which of the following is a fungal infection? a) Candidiasis b) Tuberculosis c) Malaria d) Influenza Answer: a) Candidiasis 19. What is the most common method for sterilizing surgical instruments? a) Ethylene oxide gas b) Dry heat c) Autoclaving d) Radiation Answer: c) Autoclaving 20. What is the primary vector for malaria? a) Ticks b) Fleas c) Mosquitoes d) Sandflies Answer: c) Mosquitoes Biochemistry 21. What is the main energy currency of the cell? a) ATP b) ADP c) NADH d) FADH2 Answer: a) ATP 22. Which process converts glucose into pyruvate? a) Gluconeogenesis b) Glycolysis c) Krebs cycle d) Fermentation Answer: b) Glycolysis 23. Which enzyme is responsible for the hydrolysis of fats? a) Amylase b) Lipase c) Protease d) Lactase Answer: b) Lipase