VCE Biology Question Thread

[RazzMeTazz]

When there is an unlimited concentration of enzymes but a limited concentration of substrate, the graph of the rate of enzyme reaction would look similar to a bell curve, right?

[dankfrank420]

When there is an unlimited concentration of enzymes but a limited concentration of substrate, the graph of the rate of enzyme reaction would look similar to a bell curve, right?

What's on your x-axis

[RazzMeTazz]

What's on your x-axis

Enzyme concentration! sorry I forgot to mention it!

[shivaji]

Enzyme concentration! sorry I forgot to mention it!

wouldn't it plateau?

[Reus]

wouldn't it plateau?

Yes.

What's on your x-axis

Shivaji's right, a plateu not a bell curve. A bell curve would be expected if the enzyme was to denature.

[vox nihili]

When there is an unlimited concentration of enzymes but a limited concentration of substrate, the graph of the rate of enzyme reaction would look similar to a bell curve, right?

It's a log graph

[vox nihili]

Scrap that. It'd look like y=√x

[lzxnl]

Scrap that. It'd look like y=√x

For enzymes that follow Michaelis-Menten kinetics, wouldn't it look like a hyperbola? Something of the form y = ax/(x+b) or something

[vox nihili]

For enzymes that follow Michaelis-Menten kinetics, wouldn't it look like a hyperbola? Something of the form y = ax/(x+b) or something

Technically it does, but the square root graph gives a really basic idea. Went with that because if you google "hyperbola" you're not going to get it in the form that looks anything like the Michaelis-Menten plot.

lzxnl raises a good point though guys; google "Michaelis-Menten Plot" and you'll see what it looks like



By the way, there's a special name for the hyperbola you see in the Michaelis-Menten plot, but I can't remember what it is for the life of me. Do you remember?

[RazzMeTazz]

Thanks for all the help guys! 

[RazzMeTazz]

When stating the outputs of the light-independent stage of photosynthesis should you write glucose, or PGAL/G3P (Since this is used in other biochemical pathways to produce glucose) ?

Also in the Electron-Transport-Chain of cellular respiration, when H+ ions are pumped into the intermembrane space to form an electrochemical gradient, are these H+ ions coming from the acceptor molecules: NADH and FADH2?

Thanks!

[vox nihili]

When stating the outputs of the light-independent stage of photosynthesis should you write glucose, or PGAL/G3P (Since this is used in other biochemical pathways to produce glucose) ?

Also in the Electron-Transport-Chain of cellular respiration, when H+ ions are pumped into the intermembrane space to form an electrochemical gradient, are these H+ ions coming from the acceptor molecules: NADH and FADH2?

Thanks!

Glucose

Yes. That's the purpose of those molecules.

[Reus]

On the SD it says:

– synthesis of biomacromolecules through the condensation reaction
– lipids and their sub-units; the role of lipids in the plasma membrane

And of course proteins and DNA (nucleotides). Does this mean carbohydrate structure, properties and uses...etc... isn't examinable?

[vox nihili]

On the SD it says:

– synthesis of biomacromolecules through the condensation reaction
– lipids and their sub-units; the role of lipids in the plasma membrane

And of course proteins and DNA (nucleotides). Does this mean carbohydrate structure, properties and uses...etc... isn't examinable?

There's specific reference to what you need to know about carbohydrates on the study design.

examples of polysaccharides and their glucose monomer

[Reus]

There's specific reference to what you need to know about carbohydrates on the study design.

So literally all we need to know is examples of polysaccharides and their glucose monomer?