Production of a neurotoxin that binds to target sites on spinal cord neurons responsible for inhibiting skeletal muscle contraction is a characteristic of ________.
A. Clostridium tetani
B. Clostridium difficile
C. Clostridium perfringens
D. Clostridium botulinum
Answer: A
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Which of the following statements is representative of the second law of thermodynamics?
A) Conversion of energy from one form to another is always accompanied by some gain of free energy. B) Heat represents a form of energy that can be used by most organisms to do work. C) Without an input of energy, organisms would tend toward decreasing entropy. D) Cells require a constant input of energy to maintain their high level of organization. E) Every energy transformation by a cell decreases the entropy of the universe.
Foods made from refined white flour and refined sugars ____
a. promote fat usage b. include complex carbohydrates c. are linked to increased risk of heart disease and type 2 diabetes d. have little impact on insulin levels e. are an essential part of a balanced diet
If a(n) intron containing a human gene sequence is inserted into a prokaryote cell, that molecule will
produce a functional protein product. __________________ Indicate whether the statement is true or false.
Mirror-image stereoisomers are also optical isomers.
a. true b. false