The gland that secretes a hormone that regulates calcium levels by lowering blood calcium is: MCQ with Answer and Explanation

Explanation:
The cerebrum is the largest and most prominent part of the brain, divided into left and right hemispheres, responsible for higher functions like thought, memory, and voluntary movement. The cerebellum coordinates movement, medulla controls vital functions.

Explanation:
Vitamin A (retinal) combines with opsin to form rhodopsin, the visual pigment in rod cells for dim-light vision. Deficiency causes night blindness.

Explanation:
The TATA box (consensus sequence TATAAA) is a highly conserved DNA sequence located about 25-30 base pairs upstream of the transcription start site in the promoter region of many eukaryotic genes transcribed by RNA polymerase II. It is specifically recognized and bound by the TATA-binding protein (TBP), which is a crucial subunit of the general transcription factor TFIID. The binding of TBP initiates the assembly of the pre-initiation complex, including RNA polymerase II, allowing transcription to begin.