DRAW IT Label the trophophase and idiophase in this graph. Indicate when primary and secondary metabolites are formed.
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Question

DRAW IT Label the trophophase and idiophase in this graph. Indicate when primary and secondary metabolites are formed.

Accepted Answer

Hello everyone. And welcome back. Our next question says, what is the period during which most secondary metabolites are produced? Known as a lag phase B logarithmic grow phase C stationary phase or D iops. Well, this question is a little bit tricky because we've got two different types of phases. Here. One is for description of, of, of culture growth and one is for the products of metabolism. So let's think about how cultures grow and what's going on with the production of the metabolites. So if we have concentration over time or perhaps better, we will say cell numbers over time. So we have cell numbers on the Y axis and time on the X axis. And if we'll draw our little curve, we have sort of a low flat part of the beginning, followed by this really steep rise and then a sort of flat plateau and then a drop. So this would be cell growth, this blue line that I just drew. So we have the beginning is choice a the lag phase. The all label A this is that period where the cells are getting adjusted, figuring out their conditions, what enzymes they need to produce and then we have this steep curve here. Choice B the logarithmic growth phase, our bacteria population is growing exponentially. You know, each bacteria reproducing itself over time and eventually we run out of nutrients and hit this stationary phase or choice C, that's our plateau. We've run out of nutrients and some cells are starting to die off. We're still reproducing a bit, but we're running out of resources and cells are starting to die. And at this plateau point, their two processes are balancing each other out cell reproduction and cell death. And then finally, as it heads down, this would be cell death, which isn't one of our answer choices. But that's now, cells are beginning to die. They've run out of nutrients. That is our cell growth, our culture growth curve. So I'll put blue line but our question asking us about metabolites, the process of metabolism and we have two types, primary and secondary metabolites. So our primary metabolites are produced right away. As the as the cells are growing, the cells are producing the primary metabolites. So their concentration goes up pretty much along with the uh amount of cells. So during this logarithmic growth phase, our primary metabolite concentration is grow is getting larger along with the cells. So we'll write primary metabolites produced and it's during that logarithmic growth phase. So we actually have that its own name and call it the trop phase. So I'm drawing a vertical line through um down kind of through near the top of that logarithmic growth phase. And this will be the troop phase. The primary pat tabs are produced during the troop phase, which makes sense. Primary or first secondary metabolites are things that either their conversion products of our primary metabolites. So first, you have to have some primary metabolite around to be converted into the secondary metabolite or they might only be produced after you've built up a sufficient amount of primary metabolite. So their concentration begins to build up sort of near the beginning of that stationary growth time. So I'll put a little green dotted line here to mark the concentration of secondary metabolites. So when we're talking about metabolism, again, this part of the curve gets its own name, which is the idio phase. Now, the confusion comes in because the IOP phase mostly corresponds with the stationary phase, it takes place at the same time. So you might be definitely tempted to choose the stationary phase as your answer. Since the secondary metabolites tend to be being produced during the stationary phase. But the stationary phase refers to culture growth, not metabolism. But if we recall that it occurs at the same time as the idio phase, then that lets you know why, you know, you can help remember what's going on there and you can see why it would be a little confusing and you might be tempted to choose stationary phase, but that's not the correct answer. Our answer here will be choice D idio phase, which is the correct term to refer to the metabolite profile of a bacterial culture. So we're focusing on metabolism and products of metabolism. We'll put products of metabolism, secondary metabolites pro produced during that idio phase. We'll briefly touch on A and B. And again, these are both descriptions of the culture growth. So I'll put a little culture growth there. The lag phase we again, we labeled on our graph. It's that phase. At the beginning, there's not much growth as the bacteria adjusts to its conditions. But this is not when you'll see secondary metabolites. And then choice B the logarithmic growth phase when you're having this rapid reproduction and exponential growth in your bacterial population, but not what we're looking for. We're looking for the metabolites being produced during the stationary phase. And this portion of this graph being called choice D the IOPS as the period during which most secondary metabolites are produced. See you in the next video.

DRAW IT Label the trophophase and idiophase in this graph. Indicate when primary and secondary metabolites are formed.
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Verified Solution

Key Concepts

Trophophase

Idiophase

Primary and Secondary Metabolites

DRAW IT Label the trophophase and idiophase in this graph. Indicate when primary and secondary metabolites are formed.<IMAGE>

Verified Solution

Key Concepts

Trophophase

Idiophase

Primary and Secondary Metabolites

DRAW IT Label the trophophase and idiophase in this graph. Indicate when primary and secondary metabolites are formed.
<IMAGE>