Which of the following functions do enzymes
perform?
a. assemble lipids
b. assemble carbohydrates
c. replicate DNA
d. make RNA
e. enzymes perform all of these functions
E
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Which of the following is a true statement? a. In Japan, people over age 65 make up 10% of the population
b. None of the choices. c. In the United States, projections show that people over the age of 65 will reach 20% of the population by 2030. d. Having a high percentage of people over 65 is good for the economy because older people consume fewer resources.
Most plant proteins are incomplete, meaning they lack or have a low amount of one or more ____
a. essential amino acids b. peptide bonds c. protease enzymes d. fatty acids e. vitamins
The cell membrane that surrounds all cells is said to be semipermeable. What does this mean?
A) Only particles of a substance that are small enough can pass through the cell membrane. B) The cell membrane consists of two layers of lipids with proteins that are either embedded in these layers or on the surface. C) The cell membrane always uses energy to transport particles of substances into and out of the cell. D) Only certain substances can pass through the cell membrane.
Which type of fish is more likely to live in an environment that has a lower osmolarity than that of its body fluids?
A) Brackish water fish (salt- and freshwater combined) B) Saltwater fish C) Freshwater fish