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6. During striated muscular contraction:

  • The sarcomere, I band and H zone become narrower, the A band maintains its width
  • The sarcomere and H zone become narrower, the A and I bands maintain their
  • The sarcomere lengthens, the H zone remains the same size, the A and I bands both shorten

7. During translation, there are x tRNA molecules paired to the mRNA molecule and being operated on by a ribosome, and as many as y ribosomes operating on the mRNA. xy ~ ?

  • 100
  • 1,000
  • 10,000

8. Acetylcholine causes the opening of which channel in the post-synaptic membrane?

  • Sodium ion channel
  • Potassium ion channel
  • Calcium ion channel

9. The chemo- and pressure receptors responsible for keeping the heart rate in check are found where?

  • In the carotid arteries
  • In the brain stem
  • In the aortic arch

10. Following depolaristion, what ions are released from the sarcoplasmic reticulum?

  • Sodium ions
  • Calcium ions
  • Potassium ions

11. A deletion or insertion, unless of a multiple of X, will cause Y. What are X and Y?

  • X is 3, Y is frame shift
  • X is 2, Y is cancer
  • X is 3, Y is cancer

12. How does the chemical from question 2 affect tissues in the ROOT?

  • It inhibits elongation
  • It promotes elongation
  • It causes autolysis

13. Consider the following reaction pathway: A -> D -> 4C -> 2B -> X. Which of the following would cause the system to display negative feedback?

  • X decomposes into a sixth species, E
  • X inhibits one or more of the enzymes involved in the pathway
  • X promotes one or more of the enzymes involved in the pathway

14. A complete gene, comprised of 37.5% introns, in a particular DNA section undergoes transcription, splicing then translation. The original DNA section was 1.728kBp long. What is the number of amino acids in the resulting polypeptide?

  • 577
  • 575
  • 359
  • 360
  • 361
  • 576

15. Stem cells can only be obtained from embryos. True or false?

  • 11.5
  • False
  • True

16. What does it mean to suffer from 'Type I' diabetes mellitus?

  • Type I diabetics do not produce sufficient insulin, suspected to be due to an autoimmune response to pancreatic cells and must inject insulin to maintain their BGC.
  • Type I diabetics have cells which are unresponsive to insulin (often due to obesity), and so must manage their carbohydrate intake to maintain their BGC

17. In myelinated neurons, depolarisation can only occur where?

  • Dendrites
  • Nodes of ranvier
  • Nodes of his

18. Normal blood glucose concentration (BGC) is:

  • 90mg per 100cm^3 blood
  • 9mg per 100cm^3 blood
  • 100mg per 100cm^3 blood
  • 10mg per 100cm^3 blood

19. During vasoconstriction...

  • ...the arterioles feeding the skin capillaries contract, and so do the shunt vessels.
  • ...the arterioles feeding skin capillaries contract using C-muscles and the shunt vessels dilate
  • ...the arterioles feeding the skin capillaries dilate by relaxing C-muscles, and the shunt vessel contracts

20. The chemical responsible for positive phototropism in plant shoots is ___?

  • Oxaloacetate
  • Indoleacetic Acid
  • Cytochrome b