Unlike eukaryotic cells, prokaryotic cells . a. lack a...

Key Concepts

Prokaryotic Cell Organization

Prokaryotic cells are characterized by their simpler structure, lacking membrane-bound organelles. Their DNA is not enclosed within a nucleus but instead resides in a nucleoid region, which is a defining feature distinguishing them from eukaryotic cells.

Eukaryotic Cell Organization

Eukaryotic cells are more complex, featuring a variety of membrane-bound organelles, the most notable being the nucleus. The nucleus houses the cell's DNA, providing a dedicated compartment for genetic material and its associated processes, which supports advanced cellular functions and regulation.

Transcript

00:01 Okay, so examining those cell parts and some of the differences between our prokaryotic cells and our eukaryotic cells.

00:18 So remember, so bacteria are not the only prokaryotes, but usually eg means, for example.

00:26 So usually bacteria is our standby organism that we would use.

00:33 So we also have the arcans in there as well.

00:36 But you can think of these guys as being bacteria.

00:41 And then our eukaryotes, we have our protists, plants, fungi, and animals.

00:56 Okay.

00:58 So we're thinking about cell components that may be different between our prokaryotes and eukaryotes.

01:07 So we can just go through our answer choices and see if there's some that stand out.

01:16 Use those as a clue.

01:17 We do want to keep in mind that this isn't all of the above.

01:22 So we may start to get an inkling that this is our best choice as well if we see more than one.

01:27 These answers is correct.

01:30 So let's just start off with choice a.

01:34 So when you draw a cell, if you just think about, if i told you to draw a cell right now, you might just think, okay, well, i'm going to start off with that.

01:44 The very first thing that you might draw is the plasma membrane.

01:48 And one of the reasons for that is all cells are going to have that.

01:53 So some cells are also going to have a cell wall.

01:57 Oops, i'm not drawing it very well here, but they'll have that outer cell wall to act as some extra protection.

02:02 But every single cell, if it's a cell, if it's a living thing, it has to have a plasma membrane.

02:12 So pro quo, you know, the idea that prokaryotic cells would lack a plasma membrane, that is not true.

02:20 All cells are going to have it.

02:21 Prokaryotes are cells, so they have a plasma membrane.

02:25 They need something that will, if we think about the function, we need something that will let in and out the different components that the cell needs and also release the waste and that sort of thing to act as that gatekeeper for the interior of the cell versus the exterior of the cell.

02:41 And that's the role the plasma membrane does.

02:44 So yes, this one we can get rid of right away.

02:50 Okay, so going on to our second choice, prokaryotic cells have rna, but not dna.

02:57 So this might be a little bit of an appealing answer if you don't really know what's going on.

03:01 So let's bounce back to this one in a moment.

03:05 Prokaryotic cells not having a nucleus...

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