VCE Biology Question Thread

[PhoenixxFire]

It will still be part of your unit 4 grade.

[Abi21]

It will still be part of your unit 4 grade.

Even though we're doing cellular respiration as our topic?

[PhoenixxFire]

Yep. The topic doesn't actually matter. You get marked on how well you design and report on the experiment.

[Abi21]

Yep. The topic doesn't actually matter. You get marked on how well you design and report on the experiment.

Damn! I screwed up my first sac and my ranking is very mediocre! Was hoping that i could lift my ranking with the research task.
Thanks heaps though!!

[juntyhee]

Why does auxin have an inhibitory effect on root and shoot growth at high concentrations?

Also, after conducting an experiment, why is root growth inhibited at higher concentrations of auxin, compared to shoot growth? (i.e. root length starts to decline at 1mg/L auxin conc, while shoot length starts to decline at 0.01mg/L)

[Abi21]

Why does auxin have an inhibitory effect on root and shoot growth at high concentrations?

Also, after conducting an experiment, why is root growth inhibited at higher concentrations of auxin, compared to shoot growth? (i.e. root length starts to decline at 1mg/L auxin conc, while shoot length starts to decline at 0.01mg/L)

It is because of gene regulation. Different effector proteins are produced in each situation, leading to a different responses.

[Abi21]

Hi, so for unit 3 bio, we;ve finished all our sacs. I'm ranked about 20th in a cohort of 55 and it's a very average cohort. Is there any way to improve my sac ranking because I am looking for a 40+ in bio? Ik this is a very typical question but I'm really worried about my unit 3 grade.

[Sine]

Hi, so for unit 3 bio, we;ve finished all our sacs. I'm ranked about 20th in a cohort of 55 and it's a very average cohort. Is there any way to improve my sac ranking because I am looking for a 40+ in bio? Ik this is a very typical question but I'm really worried about my unit 3 grade.

nah there really isn't any chance to improve your unit 3 sac ranking however you can still rank highly in unit 4 since you start off with a clean slate. Also if you have a mid year exam (internal) and score very well on that your teacher may secretly (or not so secretly) bump you up a few rankings.

[Abi21]

nah there really isn't any chance to improve your unit 3 sac ranking however you can still rank highly in unit 4 since you start off with a clean slate. Also if you have a mid year exam (internal) and score very well on that your teacher may secretly (or not so secretly) bump you up a few rankings.

Damn! Thanks though! we do have a mid year but i don't know if it counts for anything.

[Sine]

Damn! Thanks though! we do have a mid year but i don't know if it counts for anything.

yeah technically the mid year exam shouldn't count for anything but it isn't too rare for teachers to use that to finalise rankings

[darkz]

A cell contains enzymes, DNA, ribosomes, mitochondria and a plasma membrane. The cell would be from:

A. bacteria
B. An animal but not a plant
C. a plant but not an animal
D. any kind of organism
E. a plant or an animal

Why is the answer E, as the question doesn't state that the cell has a cell wall - isn't a characteristic of plant cell their cell wall? Or is it because the question never explicitly stated that the cell didn't have a cell wall?

[Poet]

A cell contains enzymes, DNA, ribosomes, mitochondria and a plasma membrane. The cell would be from:

A. bacteria
B. An animal but not a plant
C. a plant but not an animal
D. any kind of organism
E. a plant or an animal

Why is the answer E, as the question doesn't state that the cell has a cell wall - isn't a characteristic of plant cell their cell wall? Or is it because the question never explicitly stated that the cell didn't have a cell wall?

The answer is E because the question is not explicitly stating exclusive characteristics of a plant or animal cell respectively. When listing that a cell "contains enzymes, DNA, ribosomes, mitochondria and a plasma membrane", it only gives characteristics that belong to both plant and animal cells. The question has nothing to do with cell walls except that yes, the question was purposefully vague.

[vox nihili]

The answer is E because the question is not explicitly stating exclusive characteristics of a plant or animal cell respectively. When listing that a cell "contains enzymes, DNA, ribosomes, mitochondria and a plasma membrane", it only gives characteristics that belong to both plant and animal cells. The question has nothing to do with cell walls except that yes, the question was purposefully vague.

The relevant bit here is mitochondria. Only animal/plant cells have them. Bacteria have everything else mentioned though

[Mr West]

I read somewhere that cytokines mode of transmission is autocrine, paracrine and endocrine.

is this right?

cheers

[darkz]

I read somewhere that cytokines mode of transmission is autocrine, paracrine and endocrine.

is this right?

cheers

Yes, that it correct!