The small molecule intermediate phosphoenol-pyruvate (PEP) is unusual due to which chemical
characteristic?
a. supplies a high energy phosphate to phosphorylate ADP
b. provides high energy electrons to make ATP
c. its ability to carry out redox reactions
d. regulates the activity of phosphofructokinase
e. donates an electron to NAD+ and FAD
A
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The current theory is that chloroplasts are descendants of symbiotic cyanobacteria that lived within eukaryotic cells. If we look at their respective genomes, however, we see that the cyanobacteria have many more genes than do chloroplasts
Where did these genes go? A. Restriction enzymes removed them. B. Endosymbiosis requires a reduction in genetic material in order to be successful. C. Many of them were transported to the nucleus, and others were lost. D. Nowhere. Cyanobacteria and chloroplasts actually have the same number of genes. E. None of the answers options is correct..
The half life of Carbon 14 is approximately
____ years.
a. 16,000,000 b. 60,000 c. 8,200 d. 5,400 e. 500
Dead Artemia cells that have been treated with trypan blue appear
a. colorless. b. blue. c. red. d. indistinguishable from living treated cells.
The figure labeled “B” shows a cross-section through
a __________ and a vascular bundle. a. monocot stem b. eudicot stem c. monocot root d. eudicot root e. none of these