The energy needed to destabilize existing chemical bonds and start a chemical reaction is called
A. kinetic energy.
B. potential energy.
C. free energy.
D. activation energy.
Answer: D
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A process by which an organism produces offspring is called _____
Fill in the blank(s) with correct word
Nitrogen is released into the atmosphere by
a. nitrogen fixation. b. denitrification. c. nitrification. d. ammonification. e. decomposition
You are given the chemical code of one-half of a DNA double helix: CATGATTACCTAGAATCCTGTAAT. Which of the following sequences represents the codons and anticodons that would be used in creating a protein if the other half of the DNA strand is the coding strand?
A. mRNA codons: CATGATTACCTAGAATCCTGTAAT tRNA anticodons: CATGATTACCTAGAATCCTGTAAT B. mRNA codons: CAUGAUUACCUAGAAUCCUGUAAU tRNA anticodons: GUACUAAUGGAUCUUAGGACAUUA C. mRNA codons: CATGATTACCTAGAATCCTGTAAT tRNA anticodons: CAUGAUUACCUAGAAUCCUGUAAU D. mRNA codons: GUACUAAUGGAUCUUAGGACAUUA tRNA anticodons: CAUGAUUACCUAGAAUCCUGUAAU
You have discovered a compound that inhibits the placement of sterols in the plasma membrane. What can you deduce about the efficacy of this drug?
A) This drug may be broadly effective against both prokaryotic and eukaryotic cells. B) This drug may be broadly effective against eukaryotic cells but may be toxic in human patients. C) This drug may be broadly effective against prokaryotic cells. D) This drug may be broadly effective against eukaryotic cells. E) This drug may be broadly effective against both prokaryotic and eukaryotic cells but may be toxic in human patients.