All of the following fossils are trace fossils except the remains of ________
a. bones
b. burrows
c. eggshells
d. feces
a
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Rubisco has 16 subunits joined together to make a functional unit. Eight of the subunits are large, the
other 8 are small. What does this tell you about this protein's structure?
a. It is an example of a protein having quaternary structure. b. The protein has tertiary structure and domains but no quaternary structure. c. The primary sequence of all 16 subunits is identical, which is a unique property of enzymes participating in photosynthesis. d. The subunits each have 8 alpha helices in order to bind to CO2 and RuBP. e. It's an enzyme that is extremely resistant to denaturation.
What is the free energy change for the inward movement of calcium ions into the bacterial cell?
A cell biologist interested in the transport of calcium ions (Ca2+) across the plasma membrane of bacterial cells made the following measurements on bacterial cells at 25°C: Vm = ?150 mV [Ca2+] outside = 20 mM [Ca2+] inside = 0.4 mM A) +4.6 kcal/mol; an endergonic reaction B) +4.6 kcal/mol; an exergonic reaction C) ?9.2 kcal/mol; an endergonic reaction D) ?9.2 kcal/mol; an exergonic reaction E) +9.2 kcal/mol; an exergonic reaction
__ determine whether an organism will be genetically male or female
Fill in the blank(s) with the appropriate word(s).
Organisms in which taxon are most related