Some cells are very large, seemingly in defiance of maintaining a large surface area to volume ratio. What are some
strategies or adaptations that these cells may use in order to maintain a reasonable surface area to volume ratio? What will be an ideal response?
Concepts to Consider: Changing cell shape in order to increase surface area without
substantially increasing volume; having long thin extensions of the cells in order to increase
surface area
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Plants lose a great deal of water from their leaves in a process referred to as _____________
A. transformation B. transpiration C. transduction D. transfection
In secondary active transport, when both the driving ion and the transport ion are in high concentration outside of the
cell, in which direction will the two ions move?
a. As the driving ion moves in, the transport ion moves inb. As the driving ion moves in, the transport ion moves out c. As the driving ion moves out, the transport ion moves in d. As the driving ion moves out, the transport ion moves out e. As long as both ions are moving together, they can go either in or out
Duchenne muscular dystrophy
a. is an X-linked recessive disorder. b. affects about one in 3,500 boys. c. inevitably results in death by age 25. d. results from an abnormal structural protein in muscle cells. e. fits all of these descriptions.
What is one advantage of using transgenic plant cells to produce human proteins for hormone replacement therapy?
a. Transgenic plants produce lower protein yields than transgenic animals. b. Transgenic plants produce higher protein yields than transgenic animals. c. Plant cells are less expensive to grow than other cell types. d. Transgenic animals cannot produce human proteins. e. HIV is spread through proteins harvested from transgenic animals.