During the light reactions, energy from photons is converted into chemical energ

Question

During the light reactions, energy from photons is converted into chemical energy in the form of ATP. Explain how that occurs by completing the following sentence using the word choices given. Light is absorbed which oxidized electron transport chain where energy is harvested to push Hydrogen the membrane into the thylakoid lumen. As those molecules return to the stroma, going with / against) the gradient, the energy is coupled to ATP synthase. (oxidizes / reduces) water. The electron is passed through an hydrogen, oxygen, ATP) across (with QUESTION 10 1 points Sav Carbon dioxide is taken into the cell to produce glucose during the dark reactions. Which of the following must be true of these reactions? Carbon dioxide is oxidized, NADP is reduced Carbon dioxide and NADP are both reduced Carbon dioxide and NADP are both oxidized Carbon dioxide is reduced, while NADP is oxidized

Explanation / Answer

1) Oxidized, Hydrogen, against

2) Carbon dioxide is reduced while NADP is oxidized

For CO2 taken into the cell to produce glucose during the dark reaction requires an overall reduction of CO2 by using the electron that is available from the oxidation of NADPH.So, NADPH is oxidized to NADP+(oxidized form of NADP) and CO2 is reduced to glucose.

3) ATP

The effector that decreases the protein's activity is called as a negative allosteric regulator or allosteric inhibitor. The enzyme pyruvate dehydrogenase complex, citrate synthase, isocitrate dehydrogenase and alpha-ketoglutarate are under the negative allosteric control. All these enzymes are inhibited by a high concentration of ATP. Thus ATP is more likely to be a negative allosteric regulator of Kreb's cycle

4) In the absence of oxygen complex 4 cannot give electrons to form water in the electron transport chain. This causes NADH to build up at the start of the chain which is a negative allosteric regulator of the Kreb's cycle

Electron transport chain stops in the absence of oxygen, thus NADH is not able to get converted into NAD+(needed for the first three stages of cellular respiration) and thereby the accumulation of NADH increases and this increased concentration of NADH acts as a negation allosteric regulator of the Kreb's cycle

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