Which of the following statements about osmosis is not true?
A a red blood cell in hypertonic solution may shrink (cremate) because of osmosis
B cells can regulate osmosis by regulating the number of aquaporins in the cell membrane
C osmosis occurs only in living systems
D a red blood cell in hypotonic solution may lyse because of osmosis
Would this be c but doesn’t diffusion occur in non living and living but osmosis is only in living systems so all options are correct
osmosis doesnt have to be in living systems. Its essentially the same as diffusion but it's the water moving not the solute.
Hi
Can large populations have low genetic diversity?
Thanks
What do you think?
During initiation during transcription does helicase unwind a segment of the DNA double helix and then during elongation the RNA polymerase unwinds the rest of the DNA
dna helicase is invved in replication not transcription. Its a bit complicated and varies between prokaryotes and eukaryotes but for vce it's enough to just mention the role of RNA polymerase.
Hey
Is this VCE bio knowledge?
The control and regulation of carbon dioxide concentration levels in arterial blood is due to the
A. endocrine and nervous systems.
B. nervous system.
C. endocrine system.
D. diaphragm muscles.
What would be the answer and why?
Thanks
It isnt specifically part of vce but you do need to know that hormonal is slow, long lasting changes and nervous system is fast changes. The answer is B, you dont need to know that but you do need to be able to apply that knowledge to a scenario you're given.
Are the inputs of glycolysis glucose, 2NAD+, 2 ATP, 4 ADP, 2Pi
Or why do some say it’s 2ADP + Pi
When saying where glycolysis takes place would cytosol be more correct than cytoplasm
During glycolysis Aren’t 4 molecules of ADP converted into ATP
Its 2 nad+, 2 atp, 2 adp, 2 pi. (Plus glucose, water etc.)
It isnt 4 ADP because you have the 2 atp as input. They're essentially broken apart and then put back together again so they're atp in both input and output.
Yes cytosol is more correct as it does not involve the organelles.
how much do i need to know about the timeline on earth? do i have to memorise all of the events that occurred like cambrian explosion or when multicellularity occurred and also like the dates when these events happened.
You dont need to know specific dates, you do need to know the order. I'm on mobile so I cant find it right now but there was a good example of this on the 2017 exam.