Cancer can be characterized by:
A. a mass of rapidly dividing cells called a
tumor.
B. metastasized tumor cells that leave the
tumor and invade distant parts of the body.
C. cells that express of a type of intermediate
filament that is inappropriate for that area of
the body.
D. cells with an enhanced ability to adhere to
proteins in the basal lamina.
E. All of these choices are correct.
E
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Scientists first focused on gene regulation at the level of translation, rather than transcription, because more was known about protein than nucleic acids at the time.
Answer the following statement true (T) or false (F)
This portion of the graph shows the activation energy when there is no enzyme
a. A b. B c. C d. W + X e. Y + Z
You are working as a marine biologist off the coast of Mexico. While observing organisms in a tidepool, you find a dramatically colored animal that has not been classified before. Your observations lead you to think that this beautiful animal is apparently a nudibranch, which is a member of the mollusk phylum. However, you are puzzled by one feature that does not fit with the other anatomical and
physiological features of mollusks: stinging nematocysts in the external projections on the back of this animal. Explain how this animal might be correctly classified and what the supporting logic is. What will be an ideal response?
The part of an enzyme to which a substrate binds is called the ________.
Fill in the blank(s) with the appropriate word(s).