General Thoughts: Biology (3 Viewers)

[zestmanharold]

Re: Hsc 2009 bio exam

These are my answers for MC: C B B C C C A B B A A C B D D

dude thats exactly what i had!
...i think q9 and q11 were wrong though.........

 

[walesluke]

easy. raw mark 95+. communication was just lols, so easy haha.

you do need to mention depolarisation and preferably the values involved with resting potential and the potential "threshold". and the all or none response.

7 marker was so easy. they do the same question every year. and accomodation.

 

[Venom.]

Btw guys, feedback mechanism? I drew a kinda flowy charty thing, then another diagram of a stick figure dude with labels and arrows.

 

[walesluke]

for q 9 the ans is B

when oxygen is released by haemoglobin the carbondioxide is attracted to form carbaminohaemoglobin.

q9 is C lol. 90% of CO2 travels in the blood plasma. There is no real attraction between haemoglobin and carbon dioxie.

 

[trex1r]

for q 9 the ans is B

when oxygen is released by haemoglobin the carbondioxide is attracted to form carbaminohaemoglobin.

dumb cunt its carried in blood plasma

 

[akim93]

for q 9 the ans is B

when oxygen is released by haemoglobin the carbondioxide is attracted to form carbaminohaemoglobin.

isn't the answer C?
oxygen-> haemoglobin
carbon diovide-> blood plasma

how can carbondioxide bind to haemoglobin?? I"VE NEVER SEEN SUCH THING ON ANY TEXT BOOK

if i get this wrong ill scream!!!!!!!!!!!!!

 

[akim93]

Btw guys, feedback mechanism? I drew a kinda flowy charty thing, then another diagram of a stick figure dude with labels and arrows.

u drew 2 diagram,,??
I had one digrams with boxes and arrows in between where i labelled receptors and effectors

 

[Zantico]

70% OF CO2Travels in Plasma as carbonic acid, becomes hydrogen carbonate ions.
However 23% OF CO2 travels are carbaminohaemoglobin
i put B =( just realized it says strongly bind to haemoglobin argh!

 

[Venom.]

u drew 2 diagram,,??
I had one digrams with boxes and arrows in between where i labelled receptors and effectors

Yeah I drew the one you described plus another, just in case I guess.

 

[Stevie-lea17]

Isn't 11) b because they would be open in the cooler parts of the day?
Which is the morning and evening. And then closed during the hottest part of the day so the water isnt evaporated out?
And for 9) isnt 70% of CO2 as HCO3-, 23% as carboaminohaemoglobin and 7% dissolved in plasma.
Last time i checked, 23% was bigger than 7%.
So wouldnt 9) b be right?

 

[aidyllic]

Question 1 is C (mutations lead to the generation of new alleles, crossing over in meiosis results in new allele COMBINATION, not 'new alleles'. They are different.

Question 11 is D.

+1

Question 1 is a dot point "[FONT=&quot]Explain how mutations in DNA may lead to the generation of new alleles". The answer is C.

As for Question 11, plants minimise water loss by closing their stomates, thus they do so during the time the sun peaks. It is D.


[/FONT]

 

[Macdwg]

Isn't 11) b because they would be open in the cooler parts of the day?
Which is the morning and evening. And then closed during the hottest part of the day so the water isnt evaporated out?
And for 9) isnt 70% of CO2 as HCO3-, 23% as carboaminohaemoglobin and 7% dissolved in plasma.
Last time i checked, 23% was bigger than 7%.
So wouldnt 9) b be right?

So it is B?

I was sure it was B.

 

[Macdwg]

Most carbon dioxide enters the red blood cells and is combined with water to form bicarbonate ions (HCO3-). Some is attached to haemoglobin molecules in red blood cells and a small percentage is transported in plasma as dissolved CO2.

From the CSU website.

Note: small percentage is transported in plasma as dissolved CO2.

FUCK YEAH!

 

[Sarah182]

Ah fuck I got 2 wrong in multi choice damn it.
Other than that, I am pretty happy.

Communication was piss easy.

 

[akim93]

hey a question for the 8 marker last question in short answers

what did people talk about in genes affecting phenotype

i wrote 2 hetozygous parents can lead to a different phenotype
using a punnett square am i right?>

 

[aidyllic]

But when can they photosynthesise if the stomates are closed all day? They will die if they can't photosynthesise (Stomates are less than half open for the WHOLE day in D)

Question 11 is not referring to photosynthesis, it is referring to transpiration (or water loss) through the stomata.

 

[Stevie-lea17]

Im not sure whether it was b for question 9) now, im pretty sure that was c. sorry for my shit talking.
But im pretty sure 11 was b

 

[ihatehsc123]

enantiostasis question! I WAS LIKE WTFF!!!!!!
biggest bullshit in my life ^^

hey a question for the 8 marker last question in short answers

what did people talk about in genes affecting phenotype

i wrote 2 hetozygous parents can lead to a different phenotype
using a punnett square am i right?>

i wrote about that, plus co dominance, sex linkage, and environmental factors used the example of siamese cats turning black.
i wrote about one more thing.. forget== totally over bio

 

[azza1203]

Re: Hsc 2009 bio exam

the MC i got ABBACCABCA(BorD cant remember)CBDD

 

[Venom.]

enantiostasis question! I WAS LIKE WTFF!!!!!!
biggest bullshit in my life ^^

Possibly the easiest question? They basically told you the answer IN the question itself.