Ammonia is produced when cells break down
a. fats.
b. amino acids.
c. carbohydrates.
d. nucleic acids.
e. vitamins.
B
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Which of the following pollutants could be reduced with the use of bioremediation?
A. heavy metals B. petroleum hydrocarbons C. halogenated organic compounds D. pesticides E. All of the choices are correct.
Of all the different codons that exist, three of them do not encode a particular amino acid. Their role is to:
a. allow for any amino acid to be added in their place. b. encode tRNA molecules. c. provide instructions on the tertiary structure of the protein. d. signal the start of translation. e. provide instructions to stop translation.
In many respects, the events of prophase seem to be the reverse of those occurring in
____________________. What will be an ideal response?
Which animal is likely to have the circulatory pattern shown in the figure?
A. Mammal B. Fish C. Frog D. Bird E. Crocodile