Kinetic energy is best defined as
A. the energy of position.
B. the energy of electrical charge.
C. the energy of motion.
D. stored energy.
C. the energy of motion.
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You are asked to determine whether an unknown tissue specimen comes from a plant or an animal
Closer inspection with an electron microscope reveals that the cells are connected by small openings lined by extensions of the cell membrane and containing tubules connecting the endomembrane systems of adjacent cells. Which of the following conclusions can be drawn from your observations? A. The openings are plasmodesmata, so the tissue must come from a plant. B. The openings are plasmodesmata, so the tissue must come from an animal. C. The openings are gap junctions, so the tissue must come from a plant. D. The openings are gap junctions, so the tissue must come from an animal. E. The openings could be either gap junctions or plasmodesmata, so it cannot be determined whether the tissue came from a plant or an animal.
Which of the following is NOT a reason why eukaryotic gene regulation is more complicated than
prokaryotic gene regulation?
a. Eukaryotic DNA is sequestered in the nucleus. b. Eukaryotic DNA is complexed with histones. c. Eukaryotic transcription is completed before translation begins. d. Multicellular eukaryotic organisms produce many different types of cells. e. Eukaryotic regulatory sequences are scattered throughout the genome.
Answer the following statements true (T) or false (F)
1. Viruses can infect plants and animals, but none known that infect bacteria. 2. Many viruses are inhibited by antibiotics. 3. "Life" is defined for any particle, substance, or object as anything which is not dead. 4. The kingdom is the most all-inclusive taxonomic category. 5. The cell is the basic unit of life.
During a laboratory experiment, you discover that an enzyme-catalyzed reaction has a ?G of -20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the ?G for the new reaction?
A) -40 kcal/mol B) -20 kcal/mol C) 0 kcal/mol D) +20 kcal/mol