A form of mutation associated with the expansion in copy number of a nucleotide triplet in or near a gene is called a(n) ____________________
Fill in the blank(s) with correct word
trinucleotide repeat
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Which of the following is actively transported in the proximal tubules of the kidney?
a. bicarbonate ions b. sodium ions c. chloride ions d. water e. ADH
Four of the five answers listed below are functionally connected to each other. Select the exception
a. hammer b. pinna c. stirrup d. anvil e. tympanic membrane
A bacterium inherits a mutation that renders its topoisomerase enzyme nonfunctional. What phenotype would you expect to see in this bacterium?
A) The cell would accumulate broken DNA because overwinding cannot be corrected, so the cell would be unable to replicate and would die. B) The cell would accumulate supercoiled DNA, but otherwise it would be perfectly normal. C) The cell would accumulate relaxed DNA, which would make DNA replication and cell division highly disorganized and lead to cell death. D) The cell would accumulate relaxed DNA, but otherwise it would be perfectly normal. E) The cell would be unaffected because bacteria have many different topoisomerases that are involved in replication.
Which of the following does not occur in photosynthesis?
a. reduction of CO2 b. reduction of oxygen c. oxidation of water d. All of these are correct.