GCSE OCR 21st Century Triple Science (CBP1-7) Thread

...... Three hours of my life wasted *weep* some people even went into as much depth as the scientific names for the four stages. Oh well, rather be overprepared

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There's only transmitter chemicals on the first neurone and there's only receptors on the second neurone.

Posted from TSR Mobile

Synapses are gaps and produce a neurone transmitter (chemical) that diffuses from the first neurone into the gap. Then the neurone transmitter is bound to the receptor molecules on the second neurone where the impulse then continues to travel to the motor neurone in the spinal cord.

To be honest though, OCR have been going off spec so you never know... Also, it's great revision for AS!

There is a really good channel on youtube were a teacher goes though all the topics of biogoly. It is for the ocr 21st century board aswell. I can't say enough how his man has helped me. All i do is copy what he says, then do some work from my CGP book then exam questions. I find watching this videos is far better than the CGP books with there naff jokes. Here is the link, he also does a-level biogoly aswell so you will have to scroll down for the GCSE topics. Let me know if it helps!
http://m.youtube.com/#/user/NottsAST

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Are you all ready?! (expecting a huge roar of approval, but capitals will do.. )

Are you all ready?! (expecting a huge roar of approval, but capitals will do.. )

I'm hoping that this biology exam actually has lots of science in it.. unlike the B1B2B3 test we did. ;l

Ready-ish. Just hoping for 6 markers on comparing anaerobic and aerobic, positive and negative phototropism and long term vs short term memory.

Can someone explain the Triplet Code thing and the part about chemical synthesis? I understand about smaller molecules to larger molecules, smaller chain molecules form long chain molecules aka polymers, but how does that relate to amino acids and proteins?:s

Ready-ish. Just hoping for 6 markers on comparing anaerobic and aerobic, positive and negative phototropism and long term vs short term memory.

What would the positive and negatives of phototropism be?

Can someone explain the Triplet Code thing and the part about chemical synthesis? I understand about smaller molecules to larger molecules, smaller chain molecules form long chain molecules aka polymers, but how does that relate to amino acids and proteins?:s

What would the positive and negatives of phototropism be?

B4 Six Markers:


Comparing parts of plant/animal cell, what they do, how they help respiration.
Explaining how enzymes work + analysing/explaining data? How pH/temperature affects? Graphs?
Comparing aerobic and anerobic respiration and the advantages/disadvantages?
Comparing uses of fermentation. (Biogas/Bread/Alcohol). Maybe some explanation.
Explaining rate of photosynthesis, limiting factors, etc + analysing/explaining data.
Taking a transect/using a quadrat/light meter/ identification key.
The differences between diffusion/osmosis/active transport. Perhaps analysing/evaulating data? (I HOPE THIS ONE ISN'T USED! ><)
Comparing respiration between human cells/plant cells/bacteria cells.



B5 Six Markers:

Explaining how proteins are made by ribosomes.
Comparing Meiosis and Mitosis.
Comparing Adult Stem Cells and Embryonic Stem Cells + ethics?
Explaining how to clone using stem cells.
Explaining how to clone plants. (Cuttings, meristems, rooting powder, etc).
Explaining Phototropism and Auxins + analysing/explaining data?

B6 Six Markers:

Comparing CNS and PNS. Maybe just explaining either?
Explaining how the CNS coordinates a response with a given scenario (like, a bird sees a cat).
Explaining Synapses + why impulses can only go one way.
Explaining the reflex arc with a given scenario. (Sarah's leg still reacts when the doctor hits it with a hammer).
Explaining simple relflexes with different examples. (Sea anemones wave their tentacles when stimulated by pray's chemicals, molluscs close their shells, human eye contracting with increased light, etc, etc,).
Explaining Pavlov's dogs/conditioned reflexes.
Comparing brain development between child and adult + explain. Possibly explaining data. Maybe even comparing normal and feral children.
Different ways to study the brain + ethical issues.
Explaining how memory works + model.

(Updated version. The possible 6 markers in bold have already been asked in previous papers, HOWEVER, this doesn't mean they won't come up!!)