Edexcel A2 Biology SNAB 6BI04 ~ 6BIO5 June 2016

i gurantee you this will get you full marks if you remember all of this x
The spirometer trace
-ventilation rate = tidal volume x breathing rate
-Volume tube is calibrated
-Time is calibrated
-The tidal volume for each subject can be measured by the height from peak to trough
-One breath = one breath
-Breathing rate = number of peaks per minute
-traces should be taken at rest
-each subject should be the same gender and age
-Repeat the experiment several times to gather a mean+ more reliable

can someone tell me what exactly we need to know about GPP and NPP, rly rly stuggling with that part

Question about the Unit 5 scientific article: in paragraph 25, it talks about the creation of a bacterial toggle switch: "collins announced the first artificial toggle switch in bacteria ; the scientists designed two promoters to interact and drive gene activity if prompted by one molecular signal and to stop when prompted again". Just wondering what all of that could mean??? Any ideas?

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i literally found that page in the revision guide after i asked, lool thank u tho !

What's the difference between a CD4 on a macrophage and an MSH????

msh?


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oops I meant MHC haha

mhc?
lol im terrifiedd of bio exam !

What's the difference between a CD4 on a macrophage and an MSH????

guys what exactly are antiviral proteins and what do we need to know about them


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can someone tell me what exactly we need to know about GPP and NPP, rly rly stuggling with that part

Can one gene code for many protein? Is it because there is a large variety of ways exons can be arranged therefore alters the primary structure of a protein?
Could someone explain this to me? Am I correct?