Bacteria are single-celled microorganisms. the cell walls of these microorganisms serve as barriers to chemicals that might affect the processes that occur within a bacterial cell. antibiotic are a type of substance used to stop bacterial growth. some antibiotics cause the bacterial cell wall to rupture

a)antibiotics remove chloroplasts from plant cells to cause starvation.

b) antibiotics interfere with the transport of intracellular and extracellular material

c) antibiotics decrease the rate of cellular respiration in animal cells by producing oxygen

d) antibiotics increase the rate of dna replication in human cells by forming nuleotides

Mr. j, age 42, is a construction worker in las vegas. he recently noticed that a mole on his face seemed to be getting larger and darker. at first he did not worry because he was in the sun a lot and assumed the change may have been caused by sunburn. after a month, not only was the mole larger and darker, but it appeared to be “bumpy.” his doctor diagnosed a malignant melanoma skin cancer following biopsy of the nevus. mr. j reports pain in his right shin that does not go away when he puts his feet up or sleeps. discussion questions 1. relate mr. j’s skin changes to the warning signs for malignant melanoma. (see malignant melanoma.) 2. discuss the normal progression of this malignancy. what is the significance of the bone pain that mr. j is experiencing? (see malignant melanoma.) 3. discuss the treatment available for this patient and the prognosis for recovery. (see malignant melanoma.)