Chapter: Health & Diseases
Which one of the following is caused by abacterial pathogen?
Typhoid fever is primarily caused by Salmonella typhi, a Gram-negative bacterium.
Typhoid fever transmission occurs through ingestion of contaminated food and water, leading to:
The bacterium can survive in water and food, especially in unsanitary conditions.
Remember: "Typhoid is the 'T' in Bacteria" to recall that typhoid is bacterial, while others in the options are viral.
Include a flowchart illustrating the transmission pathway of Salmonella typhi from contaminated food/water to infected individuals, highlighting symptoms and prevention methods.
Verified against NCERT Class 11 Biology, Chapter on Diseases.
Match List-I with List-II and select the answer using the code given below the lists
Option C is correct. [Temperature is measured in Kelvin, Weight in Newton, Mass in Kilogram, Pressure in Pascal]
This question tests your knowledge of the SI units for different physical quantities like temperature, weight, mass, and pressure.
The reasoning behind the correct option C is based on the International System of Units (SI):
Remember "King Newton Caught Pascal" - Temperature (Kelvin), Weight (Newton), Mass (Kilogram), Pressure (Pascal)
Understanding SI units is crucial for relating physical quantities accurately and is a key concept in physics and engineering examinations.
Consider a chart diagram aligning each physical phenomenon like temperature, mass, pressure, etc., with their respective SI unit, associating concepts with respective units and symbols for visual learners.
The optimum pH at which the enzymes pepsin and trypsin of the human alimentary canal works are
Pepsin is an enzyme that digests proteins in the acidic environment of the stomach, while trypsin functions in the slightly alkaline conditions of the small intestine.
Enzymes are proteins that catalyze biochemical reactions. The activity of enzymes is sensitive to pH, and each enzyme has an optimum pH:
In the human alimentary canal:
Option A: Correct, as it accurately describes the pH range for pepsin and trypsin.
Option B: Incorrect; the pH values are not optimal for either enzyme.
Option C: Incorrect; these pH levels do not match the physiological conditions.
Option D: Incorrect; both enzymes require different pH levels outside of these ranges.
Remember: “2 Protein Gets Peppy” for Pepsin (pH 2) and “76 Tryp Stays Alkaline” for Trypsin (pH 8).
Verified against NCERT Class 11 Biology, Chapter 5 (Human Physiology).
Iodised salt is a vital part of our diet as it is essential for the synthesis of
Iodine is an essential nutrient that the body uses to produce thyroid hormones, primarily thyroxine (T4), which regulates metabolism and growth.
The thyroid gland uses iodine to synthesize two major hormones:
A deficiency in iodine leads to goitre and other metabolic disorders.
Estrogen, insulin, and adrenaline are produced by different glands:
Remember: “Iodine is for Thyroid.” This can help recall that iodine is crucial for producing thyroid hormones.
A diagram illustrating the thyroid gland, showing the synthesis of thyroxine and triiodothyronine from iodine, highlighting the consequences of iodine deficiency.
Verified against NCERT Class 11 Biology, Chapter on Human Physiology.
If human blood is placed in a 2% detergent solution, what will happen to the RBCs?
The behavior of RBCs in solutions is governed by the principles of osmotic pressure and tonicity.
A 2% detergent solution is considered hypertonic relative to human blood. When RBCs are placed in this solution:
Options B and C suggest swelling, while D indicates lysis, which do not occur as a result of a hypertonic solution. Consequently, RBCs will not swell or burst; instead, they will shrink.
Remember: "Hypertonic = Shrink." Hypertonic solutions draw water out of cells.
A diagram illustrating the process of osmosis in RBCs, comparing them in isotonic, hypertonic, and hypotonic solutions for clarity.
Verified against NCERT Class XI Biology, Chapter 5: Cell Structure and Function.
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