2009 Biology Unit 3 Exam Suggested Solutions

[Lemollin]

I'm pretty sure CO2 is correct for 3b =]

[polky]

q17 of mcq)
Option A is wrong. Auxin addition didn't change starch amounts, so you can't say lack of auxin causes no starch.
Option C is wrong.  There was no immediate effect in the cytokinin-added-plant, only gradually increased by a little bit in the first 12 hours.
Option D is wrong.  The increase in starch levels for the last 12 hour period (36-48hours) is greater than the increase in the 2nd 12 hour period.

So B is correct.

18) They are in the red blood cells.  Cell membrane is made of phospholipid.  So the drug is enclosed by phospholipids? (bit dodgy)

25) Option A is wrong.  Peptidases sounds like an enzyme. Step Q is just sorting out the peptides, not actually doing anything to it, so it probably won't need peptidases.
Option B is wrong.  We are going from proteins to peptides.  We're not joining peptides together!  We're breaking polypeptides up!
Option C is wrong.  Using common sense, some siblings share different characteristics like hair colour.  So they won't have identical proteins.
Option D is right.  

[hard]

q17 of mcq)
Option A is wrong. Auxin addition didn't change starch amounts, so you can't say lack of auxin causes no starch.
Option C is wrong.  There was no immediate effect in the cytokinin-added-plant, only gradually increased by a little bit in the first 12 hours.
Option D is wrong.  The increase in starch levels for the last 12 hour period (36-48hours) is greater than the increase in the 2nd 12 hour period.

So B is correct.

18) They are in the red blood cells.  Cell membrane is made of phospholipid.  So the drug is enclosed by phospholipids? (bit dodgy)

25) Option A is wrong.  Peptidases sounds like an enzyme. Step Q is just sorting out the peptides, not actually doing anything to it, so it probably won't need peptidases.
Option B is wrong.  We are going from proteins to peptides.  We're not joining peptides together!  We're breaking polypeptides up!
Option C is wrong.  Using common sense, some siblings share different characteristics like hair colour.  So they won't have identical proteins.
Option D is right. 

but there is an immediate effect. Straight away it's rising and plus its above 0. Oh and doboman i meant C not D

[paulii]

ok guys. Question 5..
I put down b.
reason: because the explanation says - largest components sediment and form a pellet.

now. the reason i didnt choose A is because surely the ER is larger than a mitochondria?

therefore B was the best answer according to my brain.

Question 18 guys.

someone explaint to me why red blood cells would be transported in phospholipids ? i dont get it.

they would be transported in protein ?

annd i just realised why i got question 20 wrong.
i put down a.M
but it states microorganism that is most likely to cause infection... and a range of antibodies ALREADY PRESENT IN THE BODY.

[Lemollin]

ok guys. Question 5..
I put down b.
reason: because the explanation says - largest components sediment and form a pellet.

now. the reason i didnt choose A is because surely the ER is larger than a mitochondria?

therefore B was the best answer according to my brain.

Question 18 guys.

someone explaint to me why red blood cells would be transported in phospholipids ? i dont get it.

they would be transported in protein ?

annd i just realised why i got question 20 wrong.
i put down a.M
but it states microorganism that is most likely to cause infection... and a range of antibodies ALREADY PRESENT IN THE BODY.

I would want some help for Q.18 too, i have got Protein as my answer, and now unsure why its wrong....

[n.f]

6c) Short answer
It is referring to the neurotransmitter breakdown isn't it?

[paulii]

6c) Short answer
It is referring to the neurotransmitter breakdown isn't it?

i said neurotransmitter acts as a bridge/pathway in order for neural impulse to cross.

[Lemollin]

would beta pleat instead of betapleated sheet be accepted?

You have mentioned the shape of the chain, so guess it would be fine.

[Lemollin]

Answers for Q7 anyone??

Cell X, Y, Z - what are they?

[Pumpkinator]

what about memory cells instead of memory b cells

[hard]

ok guys. Question 5..
I put down b.
reason: because the explanation says - largest components sediment and form a pellet.

now. the reason i didnt choose A is because surely the ER is larger than a mitochondria?

therefore B was the best answer according to my brain.

Question 18 guys.

someone explaint to me why red blood cells would be transported in phospholipids ? i dont get it.

they would be transported in protein ?

annd i just realised why i got question 20 wrong.
i put down a.M
but it states microorganism that is most likely to cause infection... and a range of antibodies ALREADY PRESENT IN THE BODY.

I would want some help for Q.18 too, i have got Protein as my answer, and now unsure why its wrong....

meeeeeeeeee too?? remember how steroid hormones are carried in proteins in the blood!!+!@!@!@!

[n.f]

Thanks to shinny for doing this run through 

[polky]

ok guys. Question 5..
I put down b.
reason: because the explanation says - largest components sediment and form a pellet.

now. the reason i didnt choose A is because surely the ER is larger than a mitochondria?

therefore B was the best answer according to my brain.

Question 18 guys.

someone explaint to me why red blood cells would be transported in phospholipids ? i dont get it.

they would be transported in protein ?

annd i just realised why i got question 20 wrong.
i put down a.M
but it states microorganism that is most likely to cause infection... and a range of antibodies ALREADY PRESENT IN THE BODY.

I would want some help for Q.18 too, i have got Protein as my answer, and now unsure why its wrong....

Hm ok, this is quite a strange question.

My assumption is that the drug would be in the red blood cells. Thus the drug would be enclosed in the RBC's phospholipid cell membrane.  

Why did you guys put protein as your answer?  Because there's hemoglobin in the RBCs, which is made of protein (and iron)?

The drug is not necessarily a steroid hormone.

[shinny]

what about memory cells instead of memory b cells

There's also such thing as memory T cells, so I'm not sure what VCAA thinks about this. My guess is that you'll still get the mark though since you've got the concept down anyway.

6c) Short answer
It is referring to the neurotransmitter breakdown isn't it?

Yep, just wasn't too sure of the name for it. I'll put that down for now and put down the formal name (if there's any) if I come across it.

thank god for that. also to the guy who's doing the answers, i dont understand how Part Y for Question 6 is an interneuron. it looks like a sensory neurone by the diagram, especially the way its cell body is positioned

Hang on a sec, I'll go over it. I wasn't too sure about that one to begin with.

[polky]

thank god for that. also to the guy who's doing the answers, i dont understand how Part Y for Question 6 is an interneuron. it looks like a sensory neurone by the diagram, especially the way its cell body is positioned

This sounds right to me!