Explanation

• O⁻ (O Negative) is the universal donor blood group.
• It can be transfused to A, B, AB, and O blood groups.
• O⁻ blood lacks A, B, and Rh (D) antigens.

Additional information:

• Universal Recipient: AB⁺ (AB Positive)
• ABO Blood Groups: A, B, AB, O
• Rh Types: Positive (+) and Negative (−)
• Total Common Blood Groups: 8 (A⁺, A⁻, B⁺, B⁻, AB⁺, AB⁻, O⁺, O⁻)

Last verified on 14-07-2026

Explanation

• Endocrinology is the scientific study of hormones and the endocrine system.
• It deals with glands that produce hormones to regulate body functions.
• Hormones control growth, metabolism, reproduction, and blood sugar.
• The endocrine system helps maintain the body's internal balance (homeostasis).

Additional information:

• Neurology → Study of the nervous system
• Cardiology → Study of the heart

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Explanation

• MRI (Magnetic Resonance Imaging) is the best scan for detailed images of soft tissues, ligaments, and the brain.
• It uses strong magnets and radio waves.
• MRI provides highly detailed images of organs and soft tissues.

Additional information:

• CT Scan: Bones, internal bleeding, chest and trauma injuries
• X-ray: Broken bones, teeth, chest examination
• Ultrasound: Pregnancy and soft organs

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Explanation

• During photosynthesis, plants absorb carbon dioxide (CO₂) from the atmosphere.
• They use carbon dioxide, water, and sunlight to prepare food (glucose).
• During this process, plants release oxygen (O₂) into the atmosphere.
• Photosynthesis mainly takes place in the chloroplasts of green leaves.

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Explanation

• If ribosomes do not function properly, protein synthesis will stop.
• Ribosomes are the site of protein synthesis in all living cells.
• Proteins are essential for growth, repair, and cell functions.
• Without proteins, the cell cannot function or survive properly.
• Ribosomes are found in both prokaryotic and eukaryotic cells.

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