Microbiology Exam #2 (practice Test Questions) 2023

Microbiology Exam #2 (practice Test Questions) 2023 Elements that are required in relatively large amounts by microorganisms are called... A.multivitamins B. meganurtients C. macronutrients D. macromolecules - Answer-C. macronutrients When a microorganism is placed in a(n) ________ solution, water will eneter into the cell and cause it to burst unless something is done to prevent it. A. hypotonic B. isotonic C. hypertonic D. osomotic - Answer-A. hypotonic If cells are grown in media containing amino acids labeled with radioactive nitrogen, most of the radioactivity will be found in the cells... A. DNA B. proteins C. phospholipids D. DNA and proteins E. DNa and phosophlipids - Answer-D. DNA and proteins Micooraginams that grow best at temperatures between 45-70 degrees celsius are called: A. Thermophiles B. Psycrophiles C. Thermophobes D. Mesophiles - Answer-A. Thermophiles Which of the following is an advantage of the standard plate count? A. can readily count cells that fomr aggregates B. determines the number of viable cells C. can be performed on very dilute samples, such as lake water D. provides immediate results E. can be used to count heat-sensitive bacteria - Answer-B. determines the number of viable cells The total number of viable microorganisms remains constant in stationary phase because: A. there is a balance between cell division and cell death B. there is a cessation of cell division even though the cells may remain metabolically activie C. either a or b D. niether a or b - Answer-C. either a or b Which of the following is NOT a direct method to measuree microbial growth?...