Under what circumstances does oxygenic photophosphorylation use non-cyclic photophosphorylation and when does it use cyclic photophosphorylation? Also describe what occurs during each process
What will be an ideal response?
Answer: Oxygenic photosynthesis generates ATP via ATPase from a proton motive force, created by electron transport. Electrons are used to reduce NADP+ and form NADPH (reducing power); thus electrons are not cycled. When sufficient quantities of NADPH are made, electrons are used to cycle through the electron transport chain, and P680 (PSII) is re-reduced. During cyclic photophosphorylation, electrons are transferred in a closed system where there is no consumption or input of electrons. NADPH is not made; instead, additional ATP is synthesized from the added proton motive force generated.
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Which statement is true of the female gametophyte of pine?
(a) It’s a product of repeated cell divisions of the functional megaspore. (b) It’s haploid. (c) It serves as the stored food to be used by the embryo sporophyte upon germination. (d) All of the above are true.
An insect bite can transmit a disease-causing _____ to a human host
a. trypanosome c. ciliate b. apicomplexan d. both trypanosome and apicomplexan
An example of natural passive immunity would be
A. chickenpox infection, followed by lifelong immunity. B. chickenpox vaccine triggering extended immunity to chickenpox. C. giving a person immune serum globulins to chickenpox virus after exposure to the disease. D. a fetus acquiring maternal IgG to the chickenpox virus across the placenta.
Which of the following methods would be the most suitable to assess whether your protein exists as a monomer or in a complex?
(a) gel-filtration chromatography (b) gel electrophoresis (c) western blot analysis (d) ion-exchange chromatography