The first hominin known to use sophisticated tools and fire was _______________. Fill in the blank(s) with the appropriate word(s)
ANS: Homo erectus
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The rate of catalysis is proportional to the concentration of the enzyme
Indicate whether the statement is true or false.
O2 is transported from air in the lungs into the blood through the process of ____
a. active transport b. simple diffusion c. facilitated diffusion d. osmosis e. active transport
During photosynthesis in a leaf, sugars are loaded into the sieve tube by , followed by to move water which increases pressure.
A. osmosis; gravity B. gravity; active transport C. active transport; osmosis D. osmosis; facilitated diffusion E. facilitated diffusion; osmosis
Which of the following provides evidence for the signal hypothesis for the targeting of a secretory protein to the rough ER?
a. The protein is larger when synthesized in vitro on free polysomes. b. The secretory protein ends up in the cytosol when a short sequence is deleted by genetic engineering. c. A normally cytosolic protein is secreted when a specific sequence is added to it by genetic engineering. d. All of the above