Psyxwar's Biology 3/4 Question Thread

[psyxwar]

I figure I might as well make a thread now so I don't need to make a thread for every single question I ask.

1) Does the VCE Biology curriculum still recognise the Five Kingdom System (and consequently, Monera?)
2) How much depth do we even need to know about kingdoms besides plants, animals, fungi and bacteria?
3) Is a knowledge of the different types of microscopes relevant at all? I know it isn't in the course, but is it something that I should look into studying?

Thanks.

[pi]

I figure I might as well make a thread now so I don't need to make a thread for every single question I ask.

1) Does the VCE Biology curriculum still recognise the Five Kingdom System (and consequently, Monera?)
2) How much depth do we even need to know about kingdoms besides plants, animals, fungi and bacteria?
3) Is a knowledge of the different types of microscopes relevant at all? I know it isn't in the course, but is it something that I should look into studying?

Thanks.

None of that is relevant for units 3/4 in any depth other than just the basics

[psyxwar]

I figure I might as well make a thread now so I don't need to make a thread for every single question I ask.

1) Does the VCE Biology curriculum still recognise the Five Kingdom System (and consequently, Monera?)
2) How much depth do we even need to know about kingdoms besides plants, animals, fungi and bacteria?
3) Is a knowledge of the different types of microscopes relevant at all? I know it isn't in the course, but is it something that I should look into studying?

Thanks.

None of that is relevant for units 3/4 in any depth other than just the basics

Thanks. So would I need to know anything about microscopes at all?

[Jenny_2108]

So would I need to know anything about microscopes at all?

nope

[psyxwar]

So would I need to know anything about microscopes at all?

nope

Okay thanks. What exactly is a "protein plaque"?

[pi]

Okay thanks. What exactly is a "protein plaque"?

Haven't heard of the term before, was there a context to it? (in a sentence etc.)

[Stick]

I figure I might as well make a thread now so I don't need to make a thread for every single question I ask.

1) Does the VCE Biology curriculum still recognise the Five Kingdom System (and consequently, Monera?)
2) How much depth do we even need to know about kingdoms besides plants, animals, fungi and bacteria?
3) Is a knowledge of the different types of microscopes relevant at all? I know it isn't in the course, but is it something that I should look into studying?

Thanks.

None of that is relevant for units 3/4 in any depth other than just the basics

Thanks. So would I need to know anything about microscopes at all?

Today we covered the synchrotron and we were told that was all. So basically microscopes aren't really explored in Year 12 Biology.

[Russ]

I assume he's referring to plaques in AD, which is the only context where I've heard protein plaques mentioned before. All you need to know is that they're from a protein called amyloid-beta, that tends to aggregate together in clumps (plaques).

[psyxwar]

Okay thanks. What exactly is a "protein plaque"?

Haven't heard of the term before, was there a context to it? (in a sentence etc.)

The context was regarding anchoring junctions.

"Protein plaques connect cells, intermediate filaments extend from the plaque into cytosol of cells"

Is it just a small abnormal patch (of protein) that's within the body?

I assume he's referring to plaques in AD, which is the only context where I've heard protein plaques mentioned before. All you need to know is that they're from a protein called amyloid-beta, that tends to aggregate together in clumps (plaques).

I'm not sure what AD is/are, but that sounds about right. Thanks!

[Russ]

Missed this, but AD is Alzheimers Disease and isn't relevant to gap junctions. When the junction forms, there are proteins on both cells that are important for connecting them together in a similar fashion to above.

[psyxwar]

^Thanks.

When say, a polar molecule like NaCl is dissolved in water, is the attraction between the H and the Cl a hydrogen bond? If it is, aren't they weaker than ionic bonds? How does it manage to "rip apart" the salt compound? Is this because they are surrounded by them/ there is more than one hydrogen around each chlorine? Or am I completely off?

Also do hydrophilic and polar necessarily mean the same thing? My dictionary seems to suggest only molecules can be polar. So would salt be just hydrophilic? (wording in the NOB textbook is a little confusing)

[pi]

^Thanks.

When say, a polar molecule like NaCl is dissolved in water, is the attraction between the H and the Cl a hydrogen bond? If it is, aren't they weaker than ionic bonds? How does it manage to "rip apart" the salt compound? Is this because they are surrounded by them/ there is more than one hydrogen around each chlorine? Or am I completely off?

Also do hydrophilic and polar necessarily mean the same thing? My dictionary seems to suggest only molecules can be polar. So would salt be just hydrophilic? (wording in the NOB textbook is a little confusing)

1) When NaCl dissolves, ion-dipole bonds are formed. And btw, NaCl is an ionic substance, it is not a polar molecule



2) For the sake of VCE bio, just assume hydrophilic and polar are the same for molecules However, ionic substances (salts, etc.) can also be hydrophilic, so hydrophilic is more of a broader term imo. Keep that distinction in mind

edit: wrote 1) and 1) -_- woops

[Stick]

Both questions relate more to Chemistry than Biology, but I'll attempt to explain both. You will learn this at the start of Unit 2 Chemistry.

1. You're spot on.

2. For the purposes of Biology, hydrophilic and polar are roughly the same thing. It is true that only molecules can be polar but salts can also dissolve as there is a positive charge and a negative charge involved.

[Russ]

Hydrogen bonds are only N/O/F, not Cl-

I second the ignore the difference between hydrophilic and polar though, biology is bucket chemistry

[Stick]

Hydrogen bonds are only N/O/F, not Cl-

Wow, how could I forget this? :S