Which of the following functional groups is mismatched to the organic compound?
A. carboxyl - fatty acids
B. amino - proteins
C. phosphate - carbohydrates
D. sulfhydryl - proteins
E. hydroxyl - alcohols
Answer: C
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Nearly all of life’s chemistry occurs near
which of the following pHs?
a. 1 b. 3 c. 5 d. 7 e. 9
Which one of the following is TRUE regarding nucleotides?
A) There are three different DNA nucleotides. B) DNA nucleotides are assembled into RNA by the process of dehydration synthesis. C) DNA nucleotides contain deoxyribose; RNA nucleotides contain sucrose. D) Nucleotides are bonded together by covalent bonds between the sugars and the phosphates. E) A DNA nucleotide could be made up of ribose, a phosphate, and cytosine.
The tryptophan operon is a repressible operon that is
A) permanently turned on. B) turned on only when tryptophan is present in the growth medium. C) turned off only when glucose is present in the growth medium. D) turned on only when glucose is present in the growth medium. E) turned off whenever tryptophan is added to the growth medium.
The study of how our body fights infection from pathogenic microbes is called ________
immunology epidemiology molecular biology epistemology