This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Gag gene encodes for - 
Select and explain. 
A. Reverse transcriptase, B. Core antigen, C. Envelope, D. Gene activation
B: Core antigen
Answer: B: Core antigen 
Explanation: The Gag gene determines the core and shell of the virus.. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO-571