The valve between the right atrium and right ventricle is the: MCQ with Answer and Explanation

Explanation:
The Golgi apparatus consists of flattened membranous sacs called cisternae. It has a forming cis face near the ER and a maturing trans face directed towards the plasma membrane. It primarily modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles. It does not synthesize ATP; that is the function of mitochondria.

Explanation:
BCG (Bacille Calmette-Guérin) is a live attenuated vaccine derived from Mycobacterium bovis, used to protect against tuberculosis, especially in children. DPT is for diphtheria, pertussis, tetanus; MMR for measles, mumps, rubella; OPV is oral polio vaccine. BCG is often administered at birth in endemic regions.

Explanation:
Immunoglobulin G (IgG) is the most abundant antibody in human blood plasma, constituting about 75-80% of all antibodies. It is the only antibody that can cross the placenta, providing passive immunity to the fetus. IgG is crucial for long-term immunity, neutralizing toxins, viruses, and bacteria, and activating the complement system.