A mutation in a tRNA gene could potentially decrease the ability of that tRNA to (select all that apply):
A. complex with ribosomes.
B. bind to an amino acid.
C. bind multiple amino acids simultaneously.
D. control DNA replication.
E. code for protein.
A, B
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Imagine that you are managing a large game ranch. You know from historical accounts that a species of deer used to live there, but they have been extirpated
After doing some research to determine what might be an appropriately sized founding population, you reintroduce them. You then watch the population increase for several generations, and graph the number of individuals (vertical axis) against the number of generations (horizontal axis). With no natural predators impacting the population, the graph will likely appear as _____. A) a diagonal line, getting higher with each generation B) an "S" that ends with a vertical line C) an upside-down "U" D) a "J," increasing with each generation
Colonization of the body is inhibited by
A. the shedding of skin cells. B. the movement of mucus by cilia. C. peristalsis. D. the flushing action of the urinary tract. E. All of the choices are correct.
Which of these animals has the greatest proportion of long-looped nephrons in their kidneys?
A) A saltwater fish B) A freshwater fish C) A freshwater mammal, such as a beaver D) A human E) A desert mammal, such as a sand rat
Whether an organism is a phototroph or a chemotroph depends on its source of energy.
Answer the following statement true (T) or false (F)