Explanation

• Bronchioles are the narrowest and most numerous air passages in lungs.
• They branch from bronchi and lead to alveoli.
• They help in controlling airflow in the lungs.
• They are an important part of the respiratory system.

Last verified on 04-06-2026

Explanation

• Zymogen cells are found in the stomach lining.
• They secrete inactive enzyme precursors called zymogens.
• These are activated into digestive enzymes in the stomach.
• They help in protein digestion.

Last verified on 04-06-2026

Explanation

• Trichinosis is a disease caused by a parasitic worm.
• It is caused by Trichinella spiralis.
• It spreads through undercooked or infected meat.
• It affects muscles and digestive system in humans.

Last verified on 04-06-2026

Explanation

• Lactate is produced during anaerobic respiration.
• It accumulates in erythrocytes and microorganisms without oxygen.
• Glucose is broken down without full oxidation.
• This process is called lactic acid fermentation.

Last verified on 04-06-2026

Explanation

• Jellyfish are bioluminescent organisms.
• They belong to Cnidaria, and some ctenophores also show light production.
• Bioluminescence means production of light by living organisms.
• It helps in defense, attraction, and communication.

Last verified on 04-06-2026

Explanation

• RNA is formed from DNA during transcription.
• In RNA, thymine (T) is replaced by uracil (U).
• DNA base pairing rules are followed in complementary form.
• So TAGC in DNA becomes AUCG in RNA.

Last verified on 04-06-2026

Explanation

• Coronavirus is named due to its crown-like appearance.
• The virus has spike proteins on its surface.
• These spikes resemble a “crown” (corona in Latin).
• This structure helps the virus attach to host cells.

Last verified on 04-06-2026

Explanation

• After production, sperm cells are stored and matured in the epididymis.
• It is located on the testis.
• It helps sperm gain motility and fertilizing ability.
• It acts as a temporary storage site for sperm.

Last verified on 04-06-2026

Explanation

• Ascorbic Acid is commonly known as Vitamin C.
• It is essential for growth, repair, and maintenance of body tissues.
• Prevents scurvy, a disease caused by Vitamin C deficiency.

Additional information:

Sources of Vitamin C (5):

1. Orange
2. Lemon
3. Guava
4. Strawberry
5. Bell pepper

Functions:

• Antioxidant
• Collagen synthesis
• Strengthens immunity

Last verified on 19-01-2026

Explanation

• Methionine is the first amino acid in protein synthesis.
• It initiates the formation of the polypeptide chain.
• It is coded by the start codon AUG.
• It is essential for initiation of translation.

Last verified on 04-06-2026