BACE Practice Exam Version A 2.0 Biological Systems Questions with Correct Answers

BACE Practice Exam Version A 2.0 Biological Systems Questions with Correct Answers What is a disadvantage to using prokaryotes in the production of biopharmaceuticals? prokaryotes are unable to properly fold and assemble more complicated eukaryotic proteins Which structure regulates the flow of molecules into and out of the cell? Plasma membrane Why is E. coli usually incubated at 37oC? The maximum growth rate for E. coli occurs at 37oC Which of the following serves as the decolorizer in a Gram stain? Alcohol Which of the following is an accurate description of Gram positive bacteria after Gram staining? purple, because gram positive bacteria have a thick cell layer of peptidoglycan in the cell membrane When exposed to a foreign antigen, the normal human immune system response is to produce which of the following? antibodies Why are biopharmaceuticals typically more difficult to manufacture than traditional chemically-synthesized pharmaceuticals? -Biopharmaceuticals are more prone to contamination -Biopharmceuticals cannot be heat sterilized like traditional pharmaceuticals -Biopharmaceuticals typically require special handling and storage Which of the following features of bacterial plasmids can be used as a marker when growing cultures? antibiotic resistance gene The observable traits of an organism are referred to as the: phenotype According to the Central Dogma of molecular biology, DNA is ____________ into RNA, which is ____________ into protein transcribed, translated