What is the difference between ADP and ATP?
a. ADP is located only in the nucleus.
b. ADP has no high energy bonds.
c. ADP has no gamma phosphate group.
d. ADP is made during glycolysis only.
c. ADP has no gamma phosphate group.
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Which of the following processes does NOT
serve to maintain low pressure at the receiving end of sieve tube pipelines? a. sucrose conversion into cell-wall polysaccharides b. sucrose conversion into starch in the receiving regions c. sucrose conversion to glucose, which is then used in cellular respiration d. activity of companion cells e. conversion of sucrose to fructose in fruits
Oncogenes are derived from
A) malignant tumors. B) proto-oncogenes. C) mutated keratotic cells. D) healthy tumor suppressor genes. E) benign tumors.
If you observed a series of blood samples from a patient who was recovering from an infection, and you saw that T and B cells were reducing their activity in successive samples, you would suspect the activity of what?
A. mast cell B. cytotoxic T cell C. suppressor T cell D. memory B cell E. natural killer cell
Which of the following is NOT an example of symbiosis?
A) bacteria in the human colon B) tapeworm in the human intestine C) tuberculosis in the human lung D) protozoa in termites E) microbes crossing the placenta to the fetus