fbpx

AQA A2 Biology B12 Respiration Kerboodle Answers

This page contains the AQA A2 Biology B12 Respiration Questions and kerboodle answers for revision and understanding.This page also contains the link to the notes and video for the revision of this topic.
 

Banner 1 C12 Respiration

Banner 2

Practice Questions

 
  • (a)
Answer:      (b) Answer: ADP + Pi → ATP (c)   Answer:
  1. Energy released in small/suitable amounts;
  2. Soluble;
  3. Involves a single/simple reaction;
  (d) Answer:
  1. ATP is unstable;
  2. ATP cannot be stored / is an immediate source of energy;
  3. Named process uses ATP ;
  4. ATP only releases a small amount of energy at a time
 
  • (a) Answer:
(b)   Answer: 1. Glucose is used/broken down during glycolysis/in cytoplasm;
  1. Glucose cannot cross mitochondrial membrane(s) / pyruvate can cross mitochondrial membrane(s);
  • Answer: Is a competitive inhibitor / attaches to active site;
  1. Reduces/prevents enzyme-substrate/E-S complex forming;
  • Answer:
  1. Krebs cycle inhibited;
  2. NAD/Coenzyme/FAD not/less reduced;
  3. Hydrogens not passed to ETC;
  4. Oxygen used as final/terminal (electron) acceptor;
 
 
  • Answer: 8;
 
  • (i)
Answer: 1. Aerobic respiration;
  1. Increase in uptake (of oxygen) with growth/reproduction/division of yeast cells; 3. Glucose/nutrients/oxygen decreases/becomes limiting / cells die / ethanol/toxins form / heat produced / anaerobic respiration occurs;
  (ii) Answer:
  1. Allow description e.g. respiration using oxygen
  2. Accept ‘oxidative phosphorylation’
  3. Ignore any reference to time
  4. Accept decrease in oxygen being linked to oxygen being ‘used up’ or equivalent
 
  • Answer: Oxygen uptake decreases/stopped;
  1. Oxygen is final (electron) acceptor/combines with electrons (and protons);
  2. Ethanol produced sooner / more ethanol produced;
      4 (a) Answer:
  1. Affects enzymes;
  2. Affects respiration;
  3. Affects volume/pressure of gases;
  4. Affects readings
(b)(i) 4 (b) (i)  1. Oxygen taken up/used (by seeds);
  1. Carbon dioxide (given out) is absorbed by solution/potassium hydroxide;
  2. Decrease in volume / pressure (inside flask);
4 (b) (ii) Answer:
  • (b) (ii) 03 mm3;
(b) Answer: 4 (c) 1. Remains the same; 2. No oxygen uptake/used; Banner 4

DISCLAIMER

Disclaimer: I have tried by level best to provide the answers and video explanations to the best of my knowledge. All the answers and notes are written by me and if there is any similarity in the content then it is purely coincidental. But this is not an alternative to the textbook. You should cover the specification or the textbook thoroughly. This is the quick revision to help you cover the gist of everything. In case you spot any errors then do let us know and we will rectify it. References: BBC Bitesize AQA GCSE Science Kerboodle textbook Wikipedia Wikimedia Commons Join Our Free Facebook Group : Get A* in GCSE and A LEVEL Science and Maths by Mahima Laroyia: https://www.facebook.com/groups/expertguidance.co.uk/ For Free Tips, advice and Maths and Science Help
Scroll to Top