What do you know about the effects of tamoxifen on different cells after binding to the estrogen receptor? What other information is related to the question?
What will be an ideal response?
The nonpolar structure of steroid hormones like estrogen allows these hormones to cross the
membrane and bind to intracellular receptors. The location of steroid hormone receptors prior to hormone
binding is cytoplasmic, but their primary site of action is in the nucleus. Binding ofthe hormone to the
receptor causes the complex to shift from the cytoplasm to the nucleus. As the ligand–receptor complex
makes it all the way to the nucleus of the cell, where they bind to different cofactors in the nucleus.
Depending on which cofactors the estrogen receptor binds to, different genes will be turned on in
different cell types.
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Chitin is found ONLY in fungi and insects
Indicate whether the statement is true or false.
New roots can form anywhere along the root, not just at the tip
A. true B. false
The karyotype of a young patient shows two Barr bodies per cell. What condition might this child have?
A. Turner syndrome B. Triple X syndrome C. Down syndrome D. Klinefelter syndrome E. This child is a normal female.
Which of the following statements best compares the ovary, ovule, and egg?
A. The three terms are synonymous. B. The ovary is the lower part of the pistil that houses the ovules (also called eggs). C. An ovule is the lower part of the pistil that houses the ovary that in turn contains the eggs. D. Ovules are small ovaries and either can produce eggs. E. The ovary is the lower part of the pistil that houses the ovules that in turn contain the eggs.