The organ that is the site of T-cell maturation is the: MCQ with Answer and Explanation

Explanation:
Mitosis is the equational division that produces genetically identical daughter cells, used for growth, development, and tissue repair. Meiosis produces gametes, binary fission is prokaryotic, fragmentation is asexual reproduction.

Explanation:
The Central Dogma of molecular biology was proposed by Francis Crick in 1958. It describes the fundamental flow of genetic information within a biological system: DNA is transcribed into RNA, and RNA is translated into protein. The flow is typically unidirectional: DNA -> RNA -> Protein. While exceptions exist (like reverse transcription in retroviruses, where RNA -> DNA), the central dogma remains the core principle of gene expression.

Explanation:
The cardiac conduction system ensures coordinated heartbeats. The sinoatrial (SA) node generates the electrical impulse, acting as the natural pacemaker. The impulse reaches the atrioventricular (AV) node, which delays it slightly to allow the atria to fully contract and empty into the ventricles. The impulse then travels down the Bundle of His to the Purkinje fibers, which rapidly distribute it throughout the ventricular myocardium, causing ventricular contraction. All statements are correct.