This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
In reference to Mycoplasma, the following are true except 
Select and explain. 
A. They are inhibited by penicillins, B. They can reproduce in cell free media, C. They have an affinity for mammlian cell membranes, D. They can pass through fiters of 450 nm pore size
A: They are inhibited by penicillins
Answer: A: They are inhibited by penicillins 
Explanation: Ans. is 'a' i.e., They are inhibited by penicillins.(Ref: Harrison, 19th/e, p. 1163; Ananthanarayan, 9th/e, p. 386)Cell wall is absent so they are not inhibited by b-lactum antibiotics.