Biol10005 MST practice question help

[hobbitle]

Hey guys
Can anyone help with clarifying some of the questions in the sample exam?

Apicomplexans have the following organelles:
a) plastid, nucleomorph, endoplasmic reticulum, nucleus
b) endoplasmic reticulum, mitochondria, apical complex, nucleus
c) plastid, nucleomorph, endoplasmic reticulum, apical complex
d) micronucleus, macronucleus, plastid, endoplasmic reticulum

I think it's b)?  They don't have a nucleomorph or a micro/narco nucleus combo, so.....

Flowering plants have all of the features in which list?
a) heterospory, tracheids, companion cells, fruit, stamens
b) vessels, bisexual gametophytes, ovules, stigmas, vascular cambium
c) cones, ovules, anthers, companion cells, vessels
d) stamens, archegonia, ovules, carpels, companion cells

Again I think it's b)?  Archegonia are only in... um, mosses I think.... tracheids only in ferns... cones only in conifers.... leaves b)....

The following is the correct order of stages in the life cycle of a hydra.
a) zygote, free-swimming larva, polyp, medusa
b) zygote, medusa, free-swimming larva, polyp
c) zygote, free-swimming larva, medusa, polyp
d) zygote, polyp, free-swimming larva, medusa

Pretty sure it's either a) or c) but to me neither make sense because I thought hydra never assumed the medusa body shape, always the polyp for their entire lives?  I mean if I had to guess i'd guess A but yeah I thought hydra never had the medusa form at all.....

And a few more....

Protistan group with intracellular parasites is called........... ??
A group of protistan absorbers and recyclers common in forests are...... Oomycetes?

Otherwise found the sample exam to be pretty OK, although I have only properly revised up to Lecture 27 (even then, still got lots of gaps!), so I didn't worry too much about the questions relating to the last 9 lectures yet.

[hobbitle]

Wow, I wasn't expecting the sample exam to be like that! The questions seem different to what we learnt? D:

B is definitely correct for the first one. I'm pretty sure that A is correct for flowering plants.
Lifecycle of hydra no idea,,,, if i had to guess it would be D, but no idea why...

Intracellular parsites? O_O ciliates? apicomplexa? plasmodium? LOL dunno
Protistan absorbers/recyclers found in forests --> Slime moulds- Ameoboid PRotists -->Ditcyostelids?

Don;t take my word for it though man! I hate this part of the course and I hate the animal kingdom content >_>

Nah the content is pretty in line with what we've learned, just quite detailed, especially Rick's stuff.  I get pretty confused with all the names of the types of protists and what their features are. 

I did a better Google of the Hydra life cycle and it turns out it does produce a little medusa form does eventuate at the end of the life cycle/start of a new cycle.... so the answer would be A there.

So many words to learn this semester, I am into cell biology so this plants and animals thing is kind of tedious but anyway, has to be done!

[LeviLamp]

omg Rick's questions look horrible ;A;
I haven't looked at the practice exam yet so that was a rude shock
granted, I haven't revised any of Rick's content yet (planning to blitz his eight lectures tomorrow) but that is a bit nastier than I expected going off his super-simple questions last semester

[hobbitle]

omg Rick's questions look horrible ;A;
I haven't looked at the practice exam yet so that was a rude shock
granted, I haven't revised any of Rick's content yet (planning to blitz his eight lectures tomorrow) but that is a bit nastier than I expected going off his super-simple questions last semester

At least he's quite predictable and has written us a seriously comprehensive email about what we need to know.  It's easy to know what he loves.
Jeeeeeeebus, 8 lectures in a day, I struggle to get through 2 in a day (plus answering relevant questions, notes, relevant worksheets etc)... but then again I only give 4 hours per subject per day.  I also kind of suck at Biology study.... haven't quite figured out how to do the rote learning subjects yet.

[hobbitle]

Here's another that always confuses the crap out of me.

I know that during replication, DNA polymerase reads the non-coding strand 3'-->5' (so it writes 5' --> 3'), but IS THIS THE SAME FOR RNA POLYMERASE?  I just want to check but I get so fricking confused with the coding/non-coding/template strand lingo....

eg if an RNA primer was added to a length of DNA, it would start writing with its 5' end (reading the 3' end of the DNA)?  Right?  Same as DNA replication?

[LeviLamp]

4 hours per subject per day, wow.
I admire your study consistency.
Re. your question, I believe so, and my notes (taken down from the lecture recording) seem to agree as well. The polymerase binds to the promoter region upstream of the gene coding region and then after some fiddling with that weird initiation complex (tell me there aren't any exam questions on that thing :s) it moves 3' - 5' and adds complementary bases until it reaches the hairpin loop of self-bindable repeats where the enzyme and mRNA seem to magically fall off the strand. So it seems fairly similar to how you'd think of plain old DNA replication only with some different structures involved and no lagging strand issues.

[hobbitle]

Ah goddamnit I had forgotten about that stuff Dawn covered; argh, at least there's still a good lot of days before the exam.

And btw that's 4 hours per subject just for whichever two exams are next, plus a little bit for the other two just to keep it in my mind.

[LeviLamp]

That's a pretty sensible strategy :/
I need to stop getting sidetracked by the Internet and turn it off when I'm using online resources 
Tomorrow is about twelve hours of listening to Rick's voice + German vocabulary, that's going to be fun 

[hobbitle]

Hah damn dude.  Thought I find listening to Rick pretty hilarious.

Hey by the way, just a heads up since you said you haven't looked at the practise exam, there are a whopping 25(!!!) sample questions for Part D and I totally reckon at least 2 out of 4 of the ones on our exam will be the same or similar, make sure you allow enough time to go through all 25!

[LeviLamp]

Do we have answers for all of them?
But I'm definitely going to go through them all now you've mentioned that, as I understand the genetics department loves recycling questions in future years so chances are Dawn might do just that, I'm not too worried about Rick and Theresa's since once I actually revise their content it's rote-learn-y and I should be able to vomit back onto the page.
Thanks THERE IS STILL HOPE

[hobbitle]

Do we have answers for all of them?

We have no answers but with the combination of lecture notes + google you can generally know if you're correct or not, with the exception of genetic hypothesis stuff, but Dawn is pretty good at releasing answers to that stuff so she might have (I haven't looked).

[LeviLamp]

oh my god with this revelation + my assignment getting an upmarking (probably, the tutor has to consult other staff first) I might be able to scrape the 90 barrier after all
god bless prac marks being worth so much

[Ballerina]

I'll answer any questions verbosely in an effort to remember and revise. THROW ME QUESTIONS! And if anyone has any questions for the tutors between now and 4 PM, I can ask them as I'm studying right next to Michelle's office...being within a 3 meter radius to Michelle makes me feel warm and fuzzy. n_n

Apicomplexans have the following organelles:

b) endoplasmic reticulum, mitochondria, apical complex, nucleus


Flowering plants have all of the features in which list?
a) heterospory, tracheids, companion cells, fruit, stamens

Heterospory means 2 different sexes among its spores, tracheids are crucial for water circulation to the higher regions, companion cells allow the functioning of phloem (which carries nutrients etc), fruit is used for pollen dispersal and the stamen are the gentleman parts of the flower.

The following is the correct order of stages in the life cycle of a hydra.
a) zygote, free-swimming larva, polyp, medusa

It seems surprising to me that medusa is the final form. I think it's as Theresa tends to show up hydrazoa in the polyp form, to make it look more distinct from jellyfish in their medusa form.




Protistan group with intracellular parasites is called........... ??

Apicomplexans. Rick was enthusiastic about the parasitic properties of these as some apicomplexans cause malaria.


A group of protistan absorbers and recyclers common in forests are....

The slime moulds and the oomycetes (water moulds) both seem like good estimates. I lean toward slime moulds, as they are prolific in living off dead organic matter like leaves, rotting logs. Oomycetes remind me of places like...my bathroom.


I know that during replication, DNA polymerase reads the non-coding strand 3'-->5' (so it writes 5' --> 3'), but IS THIS THE SAME FOR RNA POLYMERASE?  I just want to check but I get so fricking confused with the coding/non-coding/template strand lingo....

eg if an RNA primer was added to a length of DNA, it would start writing with its 5' end (reading the 3' end of the DNA)?  Right?  Same as DNA replication?

You're correct. I hate molecular biology, ahh

http://en.allexperts.com/q/Biology-664/2009/1/RNA-polymerase-promoter-sequence.htm

"What must be understood is that the READING occurs in the 3' to 5' direction because that is the direction the RNA Polymerase moves down along the DNA strand.  What is actually being produced by the RNA Polymerase as it moves along is identical to the opposite strand of DNA (the complimentary strand).  The RNA that is produced is naturally in the 5' to 3' direction as it comes out."

[hobbitle]

Cheers Ballerina, you're all over it.  I'm trying to keep the balance between Calculus and Biology at the moment, not sure if I'm winning.

[Ballerina]

Haha at least you have equilibrium! I'm boned for my Chemistry 2 exam. I was sitting in the first row of the chem revision lecture yesterday, nodding my head thoughtfully and not understanding any of the noises the lecturers were making.