The free energy of ATP hydrolysis is -31.0 kJ/mol. The free energy of glucose phosphorylation by hexokinase is
+14.3 kJ/mol. These two reactions are coupled to allow them to proceed spontaneously. What is the overall free energy
associated with this coupled reaction?
a. -45.3 kJ/mol
b. -31 kJ/mol
c. -16.7 kJ/mol
d. 16.7 kJ/mol
e. 45.3 kJ/mol
ANSWER: c
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Suppose you are culturing tobacco callus in a Petri dish at a 10:1 ratio of auxin to cytokinin. To promote only shoot
development you would ____.
a. increase the cytokinin ratio b. increase the auxin ratio c. reduce the auxin level significantly and increase the cytokinin level slightly d. grow the tobacco in the dark e. grow the tobacco in the light
There is/are __________ transcriptional start site found in the lac operon. There is/are ________ translational starts found in the lac operon
Fill in the blank(s) with the appropriate word(s).
How do diatoms affect global atmospheric CO2 levels?
a. As surface seawater warms, the photosynthetic output of diatoms increases, removing more CO2. b. CO2 absorbed by diatoms is "pumped" to the ocean floor when they die, lowering CO2 levels. c. Blooms of diatoms kill fish and other consumers, increasing decomposition and raising CO2 levels. d. Because their glass-like walls are made of silica and not carbon, diatoms do not affect CO2 levels. e. As the basis of all marine food webs, diatoms perform 50% of the world's photosynthesis and lower CO2.
The global climate has already warmed about 0.6 degrees Celsius since the Industrial Revolution.
Answer the following statement true (T) or false (F)