A miRNA’s normal job is to inactivate a tumor suppressor gene. If this miRNA is made in abnormally
high amounts,
a. the cell will become cancerous
b. the tumor suppressor gene will be overactive
c. the cell will not express the tumor suppressor gene as highly as it should
d. the cell will stop growing
e. the cell will begin to differentiate
C
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The allergen in poison ivy plants is an oil called urushiol.
Answer the following statement true (T) or false (F)
When the microfibrils in the cell wall are oriented in the same direction, the cell will expand in a direction parallel to
the microfibrils. ____________________ Indicate whether the statement is true or false.
Which prokaryotic nutritional group uses inorganic substances to produce energy and CO2 to build organic compounds?
A. Photoautotrophs B. Chemoautotrophs C. Photoheterotrophs D. Chemoheterotrophs E. Methanoheterotrophs
Growth of new blood vessels is stimulated by vascular endothelial growth factor (VEGF). This ligand binds to the VEGF receptor, which leads to the dimerization and autophosphorylation of this receptor on cytoplasmic tyrosines. What type of receptor is the VEGF receptor?
A. Enzymatic receptor B. G protein-coupled receptor C. Steroid hormone receptor D. Channel-linked receptor