You conduct an experiment in which you add increasing amounts of substrate to an enzyme solution
and then measure the resulting reaction rate. You graph your results, plotting the rate of the reaction on
the Y-axis versus substrate concentration on the X-axis. What do you conclude from your graph?
a. The reaction rate is directly proportional to substrate concentration.
b. The reaction rate is independent of substrate concentration.
c. The reaction rate increases but then decreases, forming a bell-shaped curve.
d. The reaction rate decreases with increasing substrate concentration.
e. The reaction rate increases with increasing substrate concentration up to a point, above
which the rate remains constant.
E
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Simple fruits are derived from ________
a. separate ovaries of one flower b. none of the choices c. fused ovaries of separate flowers d. one ovary
In the microarray shown in your book, the cDNAs were labeled with red and green fluorescent tags
How then do you end up with spots on the microarray emitting yellow light?
a. In light, red and green are two of the primary colors, and the combination of the two will produce yellow light. b. The yellow light comes from the laser, and a yellow spot indicates that neither cDNA hybridized to that spot on the microarray. c. The over expression of one cDNA relative to the other will skew the color pattern of the spot on the microarray. This result in the yellow color. d. The color choice was an arbitrary decision by the artist and doesn't reflect how the process actually works. e. Yellow spots are those that contain no DNA probes on the chip.
The first (capitalized) word of an organism's two-part scientific name denotes the _________.
Fill in the blank(s) with the appropriate word(s).
Trypanosoma cruzi
A. Belongs to the phylum Apicomplexa; intracellular; located in the blood; sexual and asexual reproduction; indirect life cycle B. Belongs to the phylum Euglenozoa; extracellular; located in the small intestine; asexual reproduction; direct life cycle C. Belongs to the phylum Apicomplexa; intracellular; located in the small intestine; sexual and asexual reproduction; direct life cycle D. Belongs to the phylum Euglenozoa; intracellular; located in blood and different body tissues; asexual reproduction; indirect life cycle