How can DNA be used to "fingerprint" a suspect in a crime?
What will be an ideal response?
: The DNA of a person is unique to that individual. By obtaining the DNA from nucleated cells from the crime scene (e.g., tissue, sperm), enzymes may be used to break up the DNA into fragments. Because nearly everyone's DNA is different, it also breaks up into fragments differently. When the fragments are separated, they form patterns even more unique than fingerprint patterns. A match of suspect and crime scene DNA is strong evidence.
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Macrophages are the converted monocytes that phagocytize bacteria, cell fragments, dead cells, and debris
Indicate whether this statement is true or false.
A steroid hormone acts on a target cell by
A) causing a second messenger to be formed. B) promoting phagocytosis. C) causing the cell to divide. D) directly causing protein synthesis.
Most body cells are not in direct contact with the external environment
Indicate whether the statement is true or false
Sex ________ (estrogen, testosterone) stimulate osteoblasts and promote the growth of long bones, especially in adolescence.
Fill in the blank(s) with the appropriate word(s).