For this i would say either C or D but leaning more towards C.
Answer:
Bacterial infections
Explanation:
Peptidoglycan also called as murein is a polymer which makes up the bacterial cell wall. It consists of sugars and amino acids. Sugar component is made of alternating NAM (N acetyl muramic acid) and NAG (N acetyl glucosamine) residues. A peptide of three to five amino acids is attached to NAM. The peptide chains often cross link with each other to form a strong mesh like structure.
If a drug degrades peptidoglycan structure, bacterial cell wall will not form. As a result it will not be able to survive and ultimately the infection will be cleared up. Example of such drugs are vancomycin, ramoplanin, bleomycin etc.
Answer: Use orthodontic wax to hold the broken bracket in place in your mouth until you can arrange to see your orthodontist. If the bracket has come loose, remove it if you can easily and bring it with you to the orthodontist for reattachment. Review the state of the wires from the broken braces bracket.