Which of the following statements is(are) true
concerning promoters?
a. They are short sequences in DNA.
b. They are locations in DNA where
regulatory proteins gather.
c. They control transcription.
d. They are associated with specific genes.
e. All of these are true
E
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If the gene encoding the enzyme rubisco is mutated such that it is non-functional, the process that would be affected is the ability to
A. make ATP. B. harvest photons. C. fix carbon. D. make O2. E. make NADPH. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about photo synthetic processes? What other information is related to the question? Choose Answer Do you have the necessary information to dissect the problem? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Oxygen (O2) makes up about 21% of the Earth's atmosphere. The graph below depicts changes in atmospheric O2 levels measured between the years 1990 and 2008. The burning of fossil fuels produces CO2, removing O2 from the atmosphere
It has been estimated that approximately three molecules of O2 are consumed by every single molecule of CO2 produced by fossil fuel combustion. Over about 20 years, a total loss of 0.0317% O2 from the atmosphere was calculated from this data. If you compare this graph to that shown in Figure 25.1, how is the trend in O2 levels related to the trend in CO2 levels? A. Both O2 levels and CO2 levels increase over time. B. Both O2 levels and CO2 levels decrease over time. C. O2 levels decrease as CO2 levels increase. D. O2 levels increase as CO2 levels decrease.
________ bonds are responsible for the chemical affinity between A and T (or G and C) nucleotides.
A) Ionic B) Covalent C) Hydrogen D) Hydrophobic
The organ of Corti is
a. a chemoreceptor. b. a mechanoreceptor. c. a photoreceptor. d. a nociceptor. e. all of these.