Biology (School & UG)

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Q. Which chemical agent is commonly used for high-level disinfection?
  • A. Ethanol
  • B. Chlorine
  • C. Glutaraldehyde
  • D. Hydrogen peroxide
Q. Which circulatory system is found in mammals?
  • A. Open circulatory system
  • B. Closed circulatory system
  • C. Lymphatic system
  • D. Pulmonary system
Q. Which classification level comes directly after 'Family' in the taxonomic hierarchy?
  • A. Order
  • B. Genus
  • C. Species
  • D. Class
Q. Which classification level comes directly after 'Kingdom' in the hierarchy of biological classification?
  • A. Phylum
  • B. Class
  • C. Order
  • D. Family
Q. Which classification level comes directly after 'Kingdom' in the taxonomic hierarchy?
  • A. Phylum
  • B. Class
  • C. Order
  • D. Family
Q. Which classification level is directly below 'Family'?
  • A. Order
  • B. Genus
  • C. Species
  • D. Class
Q. Which classification system is most widely used in modern botany?
  • A. Linnaean system
  • B. Phylogenetic system
  • C. Cladistic system
  • D. Phenetic system
Q. Which component of blood is primarily responsible for clotting?
  • A. Red blood cells
  • B. White blood cells
  • C. Platelets
  • D. Plasma
Q. Which component of blood is primarily responsible for oxygen transport?
  • A. Plasma
  • B. White blood cells
  • C. Platelets
  • D. Red blood cells
Q. Which component of blood is primarily responsible for transporting oxygen?
  • A. Plasma
  • B. White blood cells
  • C. Platelets
  • D. Red blood cells
Q. Which condition is characterized by the inflammation of the airways, leading to difficulty in breathing?
  • A. Asthma
  • B. Pneumonia
  • C. Bronchitis
  • D. Emphysema
Q. Which condition is characterized by the inflammation of the airways?
  • A. Asthma
  • B. Pneumonia
  • C. Bronchitis
  • D. Emphysema
Q. Which condition is characterized by the inflammation of the bronchi?
  • A. Asthma
  • B. Bronchitis
  • C. Pneumonia
  • D. Emphysema
Q. Which cytokine is known for its role in promoting the differentiation of T cells?
  • A. Interleukin-1
  • B. Interleukin-2
  • C. Tumor necrosis factor
  • D. Interferon-gamma
Q. Which cytokine is primarily involved in the activation of T cells?
  • A. Interleukin-1
  • B. Interleukin-2
  • C. Tumor necrosis factor-alpha
  • D. Interferon-gamma
Q. Which cytokine is primarily involved in the differentiation of naive T cells into Th1 cells?
  • A. IL-4
  • B. IL-12
  • C. IFN-gamma
  • D. TGF-beta
Q. Which cytokine is primarily responsible for activating macrophages during an immune response?
  • A. IL-1
  • B. IL-6
  • C. IFN-gamma
  • D. TNF-alpha
Q. Which cytokine is primarily responsible for the differentiation of naive T cells into Th1 cells?
  • A. IL-4
  • B. IL-12
  • C. IFN-gamma
  • D. TNF-alpha
Q. Which digestive disorder is characterized by inflammation of the stomach lining?
  • A. Gastritis
  • B. Irritable bowel syndrome
  • C. Celiac disease
  • D. Diverticulitis
Q. Which environmental factor can limit the rate of photosynthesis?
  • A. Temperature
  • B. Soil pH
  • C. Wind speed
  • D. Humidity
Q. Which environmental factor is most critical for seed germination?
  • A. Light
  • B. Temperature
  • C. Soil type
  • D. Humidity
Q. Which enzyme begins the digestion of carbohydrates in the mouth?
  • A. Pepsin
  • B. Amylase
  • C. Lipase
  • D. Trypsin
Q. Which enzyme catalyzes the first step of the Calvin cycle?
  • A. Rubisco
  • B. ATP synthase
  • C. NADP+ reductase
  • D. Phosphofructokinase
Q. Which enzyme catalyzes the fixation of carbon dioxide in the Calvin cycle?
  • A. Rubisco
  • B. ATP synthase
  • C. NADP+ reductase
  • D. Phosphofructokinase
Q. Which enzyme is crucial for carbon fixation in the Calvin cycle?
  • A. Rubisco
  • B. ATP synthase
  • C. NADP+ reductase
  • D. Phosphofructokinase
Q. Which enzyme is essential for synthesizing new DNA strands during PCR?
  • A. DNA ligase
  • B. Taq polymerase
  • C. Reverse transcriptase
  • D. Restriction enzyme
Q. Which enzyme is essential for the PCR process?
  • A. DNA ligase
  • B. Taq polymerase
  • C. Reverse transcriptase
  • D. Restriction enzyme
Q. Which enzyme is primarily responsible for synthesizing new DNA strands during PCR?
  • A. DNA ligase
  • B. Taq polymerase
  • C. Restriction enzyme
  • D. RNA polymerase
Q. Which enzyme is primarily responsible for the digestion of carbohydrates in the human digestive system?
  • A. Amylase
  • B. Pepsin
  • C. Lipase
  • D. Trypsin
Q. Which enzyme is responsible for breaking down carbohydrates in the human digestive system?
  • A. Amylase
  • B. Pepsin
  • C. Lipase
  • D. Trypsin
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