The use of phenol (carbolic acid) as a wound disinfectant was first practiced by

A) Lister.
B) Semmelweis.
C) Pasteur.
D) Holmes.
E) Koch.


A

Biology & Microbiology

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Consider three different enzymes (identified as 1-3, below), each of which has a unique complement of three amino acids that are crucial for the binding of the substrate at the active site

Select from choices A-D the characteristic you would predict a substrate would possess that would bind to an active site where these amino acids are present. (Consult Figure 4.2 in Chapter 4 to help you make your predictions.) Enzyme 1: leucine, tryptophan, and alanine A. relatively hydrophobic B. hydrophilic, with a negative charge C. hydrophilic, with a positive charge D. hydrophilic, but without a charge

Biology & Microbiology

All of the members of the same species occupying the same area at the same time constitute a(n):

a. individual b. population c. community d. ecosystem e. biosphere

Biology & Microbiology

Which structure produces immune cells and is part of the lymphatic system?

What will be an ideal response?

Biology & Microbiology

Which go these observations gives the most support to the endosymbiotic theory for the origin of eukaryotic cells?

a. the existence of structural and molecular differences between the plasma membranes of prokaryotic and the internal membranes of mitochondria and chloroplasts b. the similarity in size between the cytosolic ribosomes of prokaryotes and the ribosomes within mitochondria and chloroplasts c. the size disparity between most prokaryotic cells and most eukaryotic cells d. the observation that some eukaryotic cells lack mitochondria

Biology & Microbiology