Neurotoxins are produced by:

A) Clostridium botulinum and Clostridium tetani.
B) Clostridium difficile and Clostridium perfringens.
C) Pseudomonas aeruginosa and Mycobacterium tuberculosis.
D) Staphylococcus aureus and Streptococcus pyogenes.


A) Clostridium botulinum and Clostridium tetani.

Biology & Microbiology

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Outline how bony fish regulate their osmotic balance lower than the salinity of the surrounding seawater

What will be an ideal response?

Biology & Microbiology

the tongue plays a role in __________ digestion

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

An atom of nitrogen attracts electrons more strongly than an atom of hydrogen. In an ammonia molecule (NH3), which of the following best describes the electrical charge of the individual atoms?

A) The nitrogen is slightly more negative. B) The nitrogen is slightly positive. C) The hydrogens are strongly negative. D) The nitrogen becomes neutral. E) Charges balance out and none of the atoms has any charge.

Biology & Microbiology

Denaturation disrupts the secondary and tertiary structure of proteins. However, denaturation is not strong enough to disrupt what interaction that is relevant to protein structure? 

A. ionic bonds B. van der Waals attraction C. peptide bonds D. hydrophobic exclusion E. hydrogen bonds

Biology & Microbiology