Which of the following structures moves protons into the thylakoid lumen? A. Cyt

Question

Which of the following structures moves protons into the thylakoid lumen? A. Cytochrome b6f B. Pheophytin C. P700 D. Ferrodoxin E. ATP synthase Which of the following activates ribulose-1, 5-bisphosphate carboxylase (RuBisCO)? A Phosphorylation of ribulose- 1, 5 bisphosphate carboxylase B. High pH in the stroma C. Absence of light D. Low level of magnesium in the stroma E. Low concentration of ribululse 1, 5- bisphosphate What is the main goal of phase 3 of the Calvin Cycle? A. To produce glucose. B. To produce 3-phophoglycerate. C. To produce glyceraldehyde 3-phosphate. D. To produce ribulose 1, 5-bisphosphate. E. To produce ATP and NADPH. Mow many molecules of CO_2 must be fixed to produce one molecule of glucose? A. One B. Two C. Three D. Six E. Twelve Which organ is the primary regulator of Mood glucose levels? A Pancreas B. Liver C. Skeletal muscle D. Adipose tissue E. Intestines Insulin: A activates glycogen phosphorylase. B. activates glycogen synthase. C activates protein kinase A and phosphorylase kinase. D. inhibits glycogen synthesis. E. activates gluconeogenesis. Which enzyme catalyzes the removal of the trans double bond during beta oxidation? A. Acyl-CoA-dehydrogenase B. Enoyl-CoA hydratase C. Hydroxyacl CoA dehydrogenase D. B-ketothiolase E. Glycerol kinase

Explanation / Answer

Que 7:

Ans:

The structure that moves proton into thylakoid lumen is:

A) Cytochrome b6f

Explanation:

- The intermediary electron transfer complex between two photosystem is cytochrome b6f.

- It acts as a proton pump and pumps hydrogen ions from the stroma into thylakoid space.

- Thus an H+ gradient is formed during electron transfer.

- Hence correct option is A).

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