The cytoplasm of eukaryotic cells contains all of the following EXCEPT
A) chromosomes.
B) dissolved nutrients.
C) enzymes.
D) organelles.
E) water.
A
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Stable isotope probing (SIP) is a method that
A) causes cells that hybridize with a fluorescent probe to fluoresce under UV light. B) compares the isotopic ratios of different compounds in the environment to determine whether they are of biological or geological origin. C) uses substrates containing heavy isotopes to label the DNA of organisms that use those substrates. D) compares the transcription of specific isotope labeled genes under different conditions.
The purpose of the Calvin cycle is to ____
a. convert inorganic carbon into a useable form of carbon b. recover electrons lost when water was split c. capture photons of light to harvest solar energy d. counteract increasing atmospheric CO2 concentrations (global warming) e. generate the O2 gas required for cellular respiration
Recent studies have demonstrated evolution in some populations over a span of time as short as ____
a. single years b. decades c. centuries d. thousands of years e. millions of years
Which of the following is true for a reaction at equilibrium?
(a) ?G = ?G° (b) ?G° + RT ln [X]/[Y] = 0 (c) RT ln [X]/[Y] = 0 (d) ?G + ?G° = RT ln [X]/[Y]