In the female reproductive cycle, ovulation is triggered by a surge in: MCQ with Answer and Explanation

Explanation:
The sarcoplasmic reticulum is a specialized smooth endoplasmic reticulum in muscle cells that stores and releases calcium ions, which trigger muscle contraction. Mitochondria produce ATP, Golgi processes proteins, nucleus controls gene expression.

Explanation:
The limbic system is a complex set of structures in the medial temporal lobe, including the hippocampus, amygdala, and hypothalamus. It is often called the 'emotional brain' and is primarily responsible for processing emotions (fear, anger, pleasure), forming and retrieving memories, and regulating motivation and homeostatic drives (hunger, thirst). The medulla regulates heart rate, the cerebellum coordinates movement, and the occipital/temporal lobes process sensory information.

Explanation:
Polymerase chain reaction (PCR) uses Taq polymerase, primers, and thermal cycling to make millions of copies of a specific DNA sequence. Southern blotting detects DNA, electrophoresis separates, sequencing reads bases.