Complex II proteins are present in both Arabidopsis and Viscum. However, the amount of ATP produced by this complex is only about 60% of the ATP produced by Complex I, III, or IV. This lower yield of ATP is due to… A. The absence of nad genes associated with Complex I B. The comparatively low quantities of respiratory metabolism proteins in the electron transport chain of mistletoe C. The flow of electrons does not result in additions to the proton gradient and thus cannot be used to drive ATP formation via chemiosmosis D. The flow of electrons generates heat used for thermogenesis instead of oxidative phosphorylation

Complex II proteins are present in both Arabidopsis and Viscum. However, the amount of ATP produced by this complex is only about 60% of the ATP produced by Complex I, III, or IV. This lower yield of ATP is due to… A. The absence of nad genes associated with Complex I B. The comparatively low quantities of respiratory metabolism proteins in the electron transport chain of mistletoe C. The flow of electrons does not result in additions to the proton gradient and thus cannot be used to drive ATP formation via chemiosmosis D. The flow of electrons generates heat used for thermogenesis instead of oxidative phosphorylation

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter20: The Protists

Section: Chapter Questions

Problem 4CT: Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of...

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For most plants, two distinct photosystems (Photosystem I and Photosystem II) work together in series during photosynthesis. These photosystems are complexes of proteins and pigment molecules. Statement 1: Photosystem I has an absorption maximum of 680 nm, whereas Photosystem II has an absorption maximum of 700 nm. Statement 2: The special pair of chlorophyll a molecules in the reaction center of photosystem I is designated as P700, whereas the special pair of chlorophyll a molecules in the reaction center of photosystem II is designated as P680. Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true. Both statements are true. Both statements are false.
Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of photosynthesis by exposing the green alga Chlorella to CO2 labeled with the radioisotope carbon 14. By looking at which compounds the C14 ended up in, they were able to identify all intermediates in this cyclic pathway. Why did they predict correctly that the same set of intermediates would be formed in the light reaction in land plants?
The Relative Efficiency of ATP Synthesis in Noncyclic versus Cyclic Photophosphorylation If noncyclic photosynthetic electron transport leads to the translocation of 7 H+/2e- and cyclic photosynthetic electron transport leads to the translocation of 2 H+/e-, what is the relative photosynthetic efficiency of ATP synthesis (expressed as the number of photons absorbed per ATP synthesized) for noncyclic versus cyclic photophosphorylation? (Assume that the CF1CF0-ATP synthase yields 3 ATP/14 H+.)
W hen a culture of Chlamydomonas is exposed to HIGH intensity light, the cells will display negative phototaxis and move away from the light. Which of the following could act as a cellular signal triggering movement away from the light? A. Low levels of P700+ relative to P700 in the chloroplast. B. High levels of G3P in the cytosol. C. High levels of NAD+ relative to NADH in mitochondria. D. Low levels of ATP relative to ADP in the cytosol.
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	A.	The absence of nad genes associated with Complex I
	B.	The comparatively low quantities of respiratory metabolism proteins in the electron transport chain of mistletoe
	C.	The flow of electrons does not result in additions to the proton gradient and thus cannot be used to drive ATP formation via chemiosmosis
	D.	The flow of electrons generates heat used for thermogenesis instead of oxidative phosphorylation