Four of the five choices listed below are related by
their description of enzyme properties. Select the
exception.
a. specificity
b. active sites
c. activation energy
d. substrate
e. catalyst
Answer: d
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The map distances for four linked genes are as follows: A is 22 cM from B, B is 7 cM from C, C is 9 cM from D, B is
2 cM from D, A is 20 cM from D, and A is 29 cM from C. Based on these data, what is the order of these four genes on the chromosome?
a. ABCD b. ADBC c. ABDC d. BADC e. CADB
The primitive template that was thought to be
used for forming chains that resemble proteins or nucleic acids was
a. meteorites that landed in the oceans. b. clay particles in tidal flats. c. sulfur that precipitated out of hydrothermal vents. d. rusty rocks. e. magma spewed from early volcanic activity
Fetal blood flows through_____________which project into the placental.
Fill in the blank(s) with the appropriate word(s).
All of the following statements are true concerning
mycorrhizae EXCEPT that a. the fungus may penetrate into root cells. b. mycorrhizae increase the surface area for absorption. c. roots obtain minerals from the fungus. d. the fungus provides the plant with nitrogen-rich compounds. e. the plant provides the fungus with sugar.