This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of the following is not used as vector in genetics ? 
Select and explain. 
A. Adenovirus, B. Proteasome, C. Liposome, D. Retrovirus
B: Proteasome
Answer: B: Proteasome 
Explanation: The traditional viral vectors are adenoviral vectors followed by papilloma viruses and retroviruses. Retroviruses are the main and most commonly used viral vectors.Other cloning vectors for gene delivery are :-PlasmidBacteriophageCosmidBAC (Bacterial aificial chromosome)YAC (Yeast aificial chromosome).Liposomes or lipoplexes are also used as vector for gene delivery.