VCE Biology Question Thread

[sparkyblossom]

Could someone please explain why the answer is C not B?

[nerdmmb]

Could someone please explain why the answer is C not B?

I think the answer is B according to Stick.

[heymanhru]

I think the answer is B according to Stick.

Yeah, I don't see how C could be the answer.

[grannysmith]

I think the answer is B according to Stick.

Can't be C as H. Floresiensis was found on an Indonesian island, not Australia..

[sparkyblossom]

Can't be C as H. Floresiensis was found on an Indonesian island, not Australia..

"Geologically the New Guinea island and the shallow seas of Arafura is the northern part of Australia tectonic plate and once connected as a land bridge identified as Sahulland. During the end of the last ice age (around 20,000–10,000 years ago), earth experienced global climate change; a global warming with the rising of average temperature caused the melting of polar ice caps and contributed to the rising of sea surface."

According to Wikipedia (Prehistoric Indonesia)^

[MrsStark]

"Geologically the New Guinea island and the shallow seas of Arafura is the northern part of Australia tectonic plate and once connected as a land bridge identified as Sahulland. During the end of the last ice age (around 20,000–10,000 years ago), earth experienced global climate change; a global warming with the rising of average temperature caused the melting of polar ice caps and contributed to the rising of sea surface."

According to Wikipedia (Prehistoric Indonesia)^

they didn't expect us to know that...did they? :s

[sparkyblossom]

they didn't expect us to know that...did they? :s

Haha no, I highly doubt that. But if the wiki is correct, then technically answer C could be right too though couldn't it?

[MrsStark]

Haha no, I highly doubt that. But if the wiki is correct, then technically answer C could be right too though couldn't it?

Yeah it could. but according to the question and the info given, they would favor B

[heymanhru]

Can anyone explain this to me ?

[sparkyblossom]

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Can anyone explain this to me ?

That's because from one glucose molecule you get 2 acetyl CoA, compared to eight from a fatty acid molecule.

[vox nihili]

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Can anyone explain this to me ?

2 Acetyl CoA per glucose (because one per pyruvate)
8 Acetyl CoA per fatty acid

Therefore, more Acetyl CoA per fatty acid, more energy produced.

[nerdmmb]

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Can anyone explain this to me ?

One glucose molecule yields two pyruvate molecules whereas one fatty acid molecule yields 8 pyruvate molecules.

So compared to glucose, one fatty acid molecules provides more ATP molecules than a glucose molecule.

[Sup]

Were we meant to learn about fatty acids and Acetyl CoA...?

[Reus]

Look no one had it worse than me today. OH DRAW A DIAGRAM? SURE PENCIL. MISTAKE? YES. RUBBER? MY SKIN. MOISTURE? MY SWEAT. (forgot my eraser at home)

[MrsStark]

Were we meant to learn about fatty acids and Acetyl CoA...?

we were meant to know how many pyruvates is made from one glucose molecule