Which of the following can be used to estimate the number of microorganisms in a culture?

A. Measurements of microbial biomass
B. Direct counts of microbial cells
C. Counts of viable cells using colony growth procedures
D. All of the choices are correct.


Answer: D

Biology & Microbiology

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Which of the following receptor and signal transduction molecules are mismatched?

A. sensor kinase receptor (NarQ): NarL B. G-protein coupled receptor: adenylyl cyclase C. G-protein coupled receptor: phospholipase C D. enzyme linked receptors: protein kinase E. steroid receptor: calcium

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Component of cell walls, involved in maintenance of membrane structure. 

  Choose the letter of the best match: A. nitrogen B. calcium C. potassium D. phosphorus E. magnesium

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Pascal's principle

What will be an ideal response?

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Which of the following is/are TRUE regarding ghrelin?

a. ghrelin stimulates acid secretion b. removal of ghrelin secreting cells leads to appetite reduction c. ghrelin is a peptide hormone d. all of the above e. a and b

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