Explanation

• The normal body temperature is: 37°C.
• The average normal body temperature is generally accepted as 98.6°F (37°C).
• A temperature over 100.4°F (38°C) means you have a fever.

Additional Information:

• Hypothermia is the term used for temperature less than 36.50°C.
• Mild Pyrexia is the term used for temperature (99-100°F).
• Moderate Pyrexia is the term used for temperature (100-103°F).
• Severe Pyrexia is the term used for temperature (103-105°F).

Explanation

• The correct sequence from highest to lowest level of organization is I, VI, V, IV, III, II.

Additional information:

• I. Biosphere (Highest level, encompassing all life on Earth)
• VI. Ecosystem (Community of living organisms interacting with their physical environment)
• V. Species / Population (Group of organisms of the same kind)
• IV. Organ-system (Group of organs working together within an organism)
• III. Cell (The basic structural and functional unit of life)
• II. Atom (Lowest level, the fundamental unit of matter)

Last verified on 25-10-2026

Explanation

• Cystic fibrosis (CF) is caused by mutations in the CFTR gene, which encodes a membrane protein that transports chloride ions across cell membranes.
• Defective CFTR protein disrupts salt and water movement, producing thick, sticky mucus that commonly affects the lungs and digestive system.
• Cystic fibrosis is an autosomal recessive genetic disorder.
• It means a person generally must inherit a faulty copy of the gene from both parents to develop the disease.

Last verified on 25-10-2026

Explanation

• Thylakoids are flattened membrane sacs inside chloroplasts where the light-dependent reactions of photosynthesis occur.
• Chlorophyll in the thylakoid membranes absorbs light energy, which is converted into chemical energy stored in ATP and NADPH.

Last verified on 25-10-2026

Explanation

• Pepsin is produced in the stomach from pepsinogen and works in an acidic environment.
• Its production is primarily regulated by gastric mechanisms, not secretin.

Additional information:

• Secretin is released by the duodenum in response to acidic chyme entering from the stomach.
• It stimulates the pancreas to release bicarbonate-rich fluid, helping neutralize the acid.
• Trypsin, chymotrypsin, and pancreatic amylase are pancreatic enzymes.

Last verified on 25-10-2026