Which of the following statements are correct? Explain your...

Which of the following statements are correct? Explain your answers. A. The plasma membrane is highly impermeable to all charged molecules. B. Channels have specific binding pockets for the solute molecules they allow to pass. C. Transporters allow solutes to cross a membrane at much faster rates than do channels. D. Certain $\mathrm{H}^{+}$ pumps are fueled by light energy. E. The plasma membrane of many animal cells contains open $\mathrm{K}^{+}$ channels, yet the $\mathrm{K}^{+}$ concentration in the cytosol is much higher than outside the cell. F. A symport would function as an antiport if its orientation in the membrane were reversed (i.e., if the portion of the molecule normally exposed to the cytosol faced the outside of the cell instead). G. The membrane potential of an axon temporarily becomes more negative when an action potential excites it.

Transcript

00:01 Hello, so the question given here is asking for the statement.

00:05 We have to find those statements that is correct.

00:09 What we see here, a few statements are given in the option.

00:12 Let's find out which one is the correct statement here.

00:16 Here option a, that is the statement a is saying that the plasma membrane, this is highly impermeable to the charged molecules.

00:28 Here, coming to the statement b, it's saying that, channels have specific binding pockets for the solute molecule they allow to pass.

00:39 Coming to the statement c, that is saying that transporters allow solutes to cross a membrane faster rate than two channels.

00:51 And here, statement d is saying that hydrogen ions, these pumps are fueled by light energy.

00:58 Coming to the statement is that saying that the plasma membrane of many animals that contains potassium channels, but what the potassium concentration in the cytosol, this is much higher than outside the cell.

01:17 So let's come to the next statement here that is saying about the sim port.

01:23 Here they are saying that a sim port would function as an antiport if its orientation in the membrane were reversed.

01:33 Coming to the next statement is saying that the membrane potential of an axon, this temporarily becomes more negative when an action potential excites it.

01:46 So let's start understanding with the statement a here and find out which of the statement here are.

01:53 Correct.

01:54 Here if we talk about the statement a.

01:57 So statement a is saying here that about the plasma membrane that it is highly impermeable.

02:09 Impermeable to what? to all the charged molecules.

02:14 So this is the given statement.

02:16 Right.

02:18 And let's understand and find out is this correct or not.

02:22 So, what we know that the plasma membrane, this is less permeable.

02:28 This is less permeable, less permeable.

02:33 But they are saying that it is impermeable.

02:36 We know that it is less permeable to the charged molecules or ions such as sodium, chloride, but molecules like other molecules we can say n -o.

02:49 This can pass freely.

02:52 So here what we see that it is not impermeable to any of the charged molecules.

02:59 So here statement a, this is false, right? this is not correct.

03:05 This is incorrect.

03:08 In correct.

03:09 Coming to the statement b here, so statement b is saying that the channels that have specific binding pockets for the solute molecules to pass through.

03:20 But what we know here that transport bind here for binding transporters work.

03:30 Transporters this binds to the solute and not the channels because the function of the transporter is to transport that solute molecule so they are binding to that and not the channels, channels are giving the way.

03:46 The channels they are just giving the way.

03:50 Right.

03:51 So here what we see this is also incorrect.

03:53 Right.

03:58 So here is the what we got that the statement a, this is incorrect and statement b, this is also incorrect as the question is asking us to find out the correct statement.

04:15 So let's move to the statement c here.

04:18 So what statement c is saying that it's saying that the transporters allow solutes to cross a member.

04:25 At a much faster rate than two channels.

04:29 So what we know that transporters they allow but not as much faster because transporters they allow the substances at the slower rate as compared to channels because through the channels diffusion can also take place...

Question

Please give Ace some feedback