Biology Unit 3 Questions Megathread

[banditkeith]

Really basic question but ions require protein channels to diffuse into a cell?

Also, Complement proteins stimulate inflammation and inflammation increases access for complement proteins
to the infected area right? So which one comes first?

[Russ]

Yes

Neither is dependent on the other, so it's down to chance

[liuetenant]

my teacher says complement proteins are both in the second and third lines of defense...how is that so?

[amun]

hey im kinda freaking out about tomorrow can u guyys please tell me what are the important things we need to  know from homestasis and nervous system aand endocrine  and main things on immunity please ?

[WhoTookMyUsername]

is glucose predominantly absorbed from the stomach by faciliated diffusion?
Also, can disaccarides be absorbed from the stomach?

[jane1234]

This has probably been asked before, but I cbs looking through 50 pages for it:

VCAA 2010 MC 17...

Which plant has highest rate of photosynthesis; the one in red, blue, green or yellow light?

The answer is red light but all the absorption graphs I've seen show that blue light gives the highest rate...??

Confused...

[vexx]

This has probably been asked before, but I cbs looking through 50 pages for it:

VCAA 2010 MC 17...

Which plant has highest rate of photosynthesis; the one in red, blue, green or yellow light?

The answer is red light but all the absorption graphs I've seen show that blue light gives the highest rate...??

Confused...

I was under the impression that photosystem II (p680) had the highest rate at 680mm which corresponds to absorption of red light.

[jane1234]

Hmm... well overall... I don't know.
Let's just go with VCAA because they mark the exams

Also, can someone explain how if less energy is retained from food it means that they will weigh more?

[lexitu]

That's a mistake in the suggested responses, ignore it

[jane1234]

That's a mistake in the suggested responses, ignore it

You mean if less energy is retained they will weigh less?

EDIT: Haha just read the other thread. Think I'm right and they're wrong because more energy retained = more stored = more weight Yay I can put those marks back on

[lexitu]

Yep. Just think about it logically - you eat a lot and you don't use much of energy then you put on weight. You eat a lot and you use heaps of that energy then you don't put on weight. Same idea here.

[jane1234]

But if your hypothesis WAS wrong, would they take marks off for it?

[lexitu]

If they outline what the researchers thought, then yes, I think they would. If they didn't give you enough information about what the researchers were hypothesising, then I think no - I hypothesis is exactly that - it can be supported or unsupported in the findings.

[WhoTookMyUsername]

Unit 3 // end


Unit 4 // Start


MY FIRST SAC IS IN UNDER 2 WEEKS ?

- is there experimental design for U4 as well?

[Christiano]

Perhaps we should start a Unit 4 Question Megathread?