AQA BIOL5 ~ 17th June 2013 ~ A2 Biology

That is quite confusing haha! I just remember this:

Respiration is an exothermic reaction so heat will always be generated, so you've got it spot on that the body will increase its rate of respiration to increase the heat generation.

Don't forget though that respiration is an enzyme-controlled reaction. As temperature increases, kinetic energy of molecules increases and so enzyme activity will increase - increasing the rate of respiration.

Respiration produces ATP, so now with the greater the rate of respiration, more ATP is going to be produced.

Respiration also runs on oxygen as fuel, so more oxygen is needed to continue fuelling this greater rate of respiration.

It is weird how it seems contradictory and I think that's because there's more complexity to respiration than the specification will cover without going beyond A-Level. I really hope this helps!!

what does it mean when a mark scheme says neutral would you get the mark or not?

I got about 50% and I'm predicted an A* :P Not that I'm going to get one because of this silly essay

Our teacher gave us a list of essays:

1. Discuss the issues associated with the use of recomibnant DNA.
2. Discuss the influences humans may have over species diversity.
3. Discuss the different ways organisms use ATP.
4. How do amino acids get from our food to becoming proteins in the body?
5. Discuss negative feedback and its importance in biology.
6. Polymers have different structures and functions. Describe how the structures of different polymers are related to their functions.
7. The transfer of energy between different organisms and between these organisms and their environment.
8. Cycles in biology.
9. How bacteria affect human lives.
10. Protein synthesis as a fundamental process to life.

I would quite like this list too haha!

I think I am going to revise enzymes and proteins, diseases, and the transport of substances. Maybe the uses of ATP too (that would be an awesome essay aha).

what does it mean when a mark scheme says neutral would you get the mark or not?

What would you include in a "Uses of ATP" essay?
I know theres obviously loads but i am only thinking of the few obvious ones: active transport etc.

What role does a promoter play in transcription?

The different ways in which organisms use ATP OR ATP and its roles in living organisms
The nature/structure of ATP and its importance as energy currency. Production and use of ATP in cytoplasm by glycolysis Production of ATP by mitochondria in Krebs cycle and ETS – aerobic respiration. Anaerobic respiration. Role of chloroplasts in ATP production via light independent reaction Uses e.g. Active transport (carrier protein shape changes), Nerve action (maintaining resting potentials via Na+/K+ pump and resynthesis of ACh), selective reabsorption by nephron, absorption by gut, Calvin cycle, muscle contraction (cross bridge formation), Biosynthesis of organic compounds, Contractile vacuoles, Translocation (loading of phloem), cell division (movement of chromosomes via spindle), CP formation in muscles, Nitrogen fixation (Blue-green algae), Kidney function, movement of sperm, secretion of digestive enzymes in saprophytic fungi, cilia and flagella action

I'm thinking of chemistry here ha, what are polymers in biology?

restriction mapping is cutting a large piece of DNA into smaller chunks using restriction endonucleases so that these chunks' DNA sequence can be determined by DNA sequencing.

this is because very large pieces of DNA are hard to work out the sequence of through DNA sequencing so they're cut into manageable chunks and pieced back together in the correct order to have the whole DNA base sequence.

(what my CGP book says :P)