Alright. So here we have an example problem that wants us to fill in the 2 blanks that we have here in each of these sentences using one of the 4 potential answer options down below. And so notice that the first sentence says the light reactions are powered by blank energy, and then the second sentence says in normal photosynthesis, the products of the light reactions are used to power blank. And so what you can see is when we look at these four answer options, options a and b both mention photorespiration, which we have not yet talked about in our course yet, but we will talk about this later in our course in a different video. But for now, because we have not yet introduced photorespiration, we should have been able to identify both option a and option b as being incorrect answer options here. Now moving on we have here option c and d, and really the difference is that option c says sunlight and option d says potential, for this first blank. And, it's true that in normal photosynthesis, the products of the light reactions are used to power the Calvin cycle. So this part here is going to be the same for the second blank. And really, again, what we're looking for is which one of these answer options is going to be best for the first blank. And of course, we know that photosynthesis is going to be driven by solar energy or sunlight, energy from sunlight. And so the correct answer here is going to be answer option c. And so we can go ahead and indicate that c here is the correct answer for this problem and that concludes this example, so I'll see you all in our next video.
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9. Photosynthesis
Light Reactions of Photosynthesis
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