Describe the biochemical properties of a biological catalyst
What will be an ideal response?
Catalysts (enzymes) speed up only those reactions that would occur spontaneously anyway. They are not consumed in the reaction, nor are they permanently changed after the reaction is completed.
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Why are steroids considered lipids?
a. Because they are soluble in polar solvents. b. Because they are not soluble in polar solvents. c. Because they are soluble in polar solvents at certain temperatures. d. None of the above.
One method for detecting tumors in body tissue involves the use of radioactive materials to create three-dimensional images showing metabolic activity of a specific tissue. This technique is referred to as
A) magnetic resonance imaging. B) positron-emission tomography. C) mammography. D) electrophoresis. E) photodynamic therapy.
A change in one nucleotide of the DNA sequence, that results in the same amino acid being coded for is called a _____.
A) missense mutation B) silent mutation C) nonsense mutation D) frameshift mutation
Koch's postulates are criteria used to establish that
A. microbes are found on dust particles. B. life-forms can only arise from preexisting life-forms. C. a specific microbe is the cause of a specific disease. D. microbes can be used to clean up toxic spills. E. a specific microbe should be classified in a specific kingdom.