Iron is considered an essential element for many bacteria. Based on the animation, how would lack of iron affect energy production of a bacterium?
a. Lack of iron would mean lack of heme, and thus lower amounts of functioning cytochrome proteins. This would mean lower energy yields.
b. Lack of iron would mean that most of the oxygen could be reduced to form water, improving energy yields.
c. Lack of iron would not have any affect on this system.
Answer: a. Lack of iron would mean lack of heme, and thus lower amounts of functioning cytochrome proteins. This would mean lower energy yields.
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Which of the following is not true of sponges?
A. Mesohyl is mostly noncellular and provides structural support. B. Choanocytes have flagella that beat in a coordinated fashion. C. Sponges are among the most primitive organisms to have developed reproductive organs. D. Gas exchange of oxygen and carbon dioxide occurs through diffusion.
The correct operational sequence of the three processes listed below is:
a. glycolysis >> electron transport >> Krebs. b. electron transport >> glycolysis >> Krebs. c. Krebs >> glycolysis >> electron transport. d. electron transport >> Krebs >> glycolysis. e. glycolysis >> Krebs >> electron transport
Select the hydrogen acceptor molecule that stores electrons in the process of photosynthesis:a
nicotinamide adenine dinucleotide (NAD+) b. nicotinamide adenine dinucleotide phosphate (NADP+) c. flavin adenine dinucleotide (FAD) d. adenine triphosphate (ATP) e. adenine diphosphate (ADP)
A possible mutagen is
a. UV light b. translocation c. an anticodon d. hemoglobin