Oxygen has an atomic mass of 16 and an atomic number of 8. How many neutrons are present?
A. 8
B. 16
C. 4
D. 24
A. 8
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A phospholipid molecule has a polar and a nonpolar end. Because of this, water molecules form
A. polar bonds with the nonpolar end of the phospholipid molecule. B. polar bonds with the polar end of the phospholipid molecule. C. hydrogen bonds with the nonpolar end of the phospholipid molecule. D. hydrogen bonds with the polar end of the phospholipid molecule. E. covalent bonds with the nonpolar end of the phospholipid molecule.
The rate at which an animal consumes energy at rest is called _______.
A. glycogenolysis B. gluconeogenesis C. the basal metabolic rate D. rumination E. fermentation
Males of some animal species have a display area where they compete for reproductively available
females. This area is known as: a. a lek. b. a home range. c. a pride. d. a territory. e. a hive.
Glycolysis is thought to be one of the most ancient of metabolic processes. Which statement supports this idea?
A) Glycolysis is the most widespread metabolic pathway. B) Glycolysis neither uses nor needs O2. C) Glycolysis is found in all eukaryotic cells. D) The enzymes of glycolysis are found in the cytosol rather than in a membrane-enclosed organelle. E) Ancient prokaryotic cells, the most primitive of cells, made extensive use of glycolysis long before oxygen was present in Earth's atmosphere.