| List - I | List – II | ||
| A. | Schwann cells | i. | Neurotransmitter |
| B. | Synaptic knob | ii. | Cerebral cortex |
| C. | Bipolar neurons | iii. | Myelin sheath |
| D. | Multipolar neurons | iv. | Retina |
The correct matches are:
• Schwann cells form the myelin sheath around axons. (A-III)
• The synaptic knob contains neurotransmitters. (B-I)
• Bipolar neurons are found in the retina. (C-IV)
• Multipolar neurons are found in the cerebral cortex. (D-II)
Therefore, the correct option is (1): A-III, B-I, C-IV, D-II.
শ্রবণ কেন্দ্র” বা “মিক্সরেশন সেন্টার” উপস্থিত
Copy the diagram given below. 
(a) Name the structure.
(b) Label Gray matter and White matter.
Karan was standing on a high stool and cleaning the ceiling fan.
He suddenly loses balance and sustains a head injury. An examination reveals that his pupils have lost the capacity to constrict in bright light. Which structure has been damaged?
Bharat woke up late in the morning and missed the school bus.
This situation stimulated the nerves of the sympathetic system which resulted in: 
Given below are two statements:
Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements, choose the most appropriate answer from the options given below: