A second-site mutation that compensates for the mutation in one gene by mutating a second gene and restoring the wild-type phenotype is also known as a ________ mutation
Fill in the blank(s) with correct word
suppressor
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Compare the leakage rates of sodium and potassium into and out of a neuron at rest. How is the relationship between these rates best described?
A. Leakage of sodium ions out of the neuron is greater than leakage of potassium ions into the neuron. B. Leakage of sodium ions into the neuron is greater than leakage of potassium ions out of the neuron. C. Leakage of potassium ions out of the neuron is greater than leakage of sodium ions into the neuron. D. Leakage of potassium ions into the neuron is greater than leakage of sodium ions out of the neuron. E. Leakage of potassium ions out of the neuron is equivalent to leakage of sodium ions into the neuron.
The following statements describe how cancer is staged. Which of the statements is true?
A. Most cancers are grouped into stages 1-4; however, treatment options are only available for stages 1-3. B. Once a cancer reaches each stage, it cannot be reversed, as tumors only grow in size, even with aggressive treatments. C. Cancer is described based on the size of the tumor, if the tumor has invaded nearby tissues, if it has spread to lymph nodes, and if it has moved to other organs of the body. D. Cancer is described by ten stages, each with their own subdivisions. The lower the stage, the worse the prognosis.
Agammaglobulinemia is strictly an environmental disease. Indicate whether the statement is true or false
________ will take calcium from the blood, whereas ________ will deposit calcium into the blood.
A. Osteocytes; osteoblasts B. Osteoblasts, osteocytes C. Osteoblasts; osteoclasts D. Osteoclasts; osteoblasts E. Osteocytes; osteoclasts