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6. Describe the role of ATP in the sliding filament theory.
- ATP binds to troponin molecules on the actin, releasing the myosin head
- ATP binds to myosin head, releasing it from actin, then it is hydrolysed to ADP, 'recocking' the head.
- ATP binds to the myosin head, altering the myosin tail's angle, pulling the actin along
7. The chemical responsible for positive phototropism in plant shoots is ___?
- Indoleacetic Acid
- Cytochrome b
8. Stem cells can only be obtained from embryos. True or false?
9. When using stem cells to repair damaged tissues, the patient's own stem cells are often used. Why is this?
- Using stem cells from another individual is illegal
- To prevent the rejection of the treatment due to the presence of foreign antigens
- To prevent rejection of the treatment based on the nocebo effect
10. A point mutation occurs. It may be either silent, nonsense or mis-sense. How many of the three will affect the primary structure of the resulting polypeptide?
11. A response whose randomness elevates alongside increasingly unfavourable conditions is a ___?
12. How does the chemical from question 2 affect tissues in the ROOT?
- It inhibits elongation
- It promotes elongation
- It causes autolysis
13. Calcium ions bind to  on  molecules, freeing binding sites for  on  filaments
- 1: Troponin, 2: Tropomyosin, 3: Myosin heads, 4: Actin
- 1: Tropomyosin, 2: Myosin heads, 3: Actin, 4: Troponin
- 1: Actin, 2: Tropomyosin, 3: Myosin heads, 4: Troponin
14. 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 ~ ?
15. Heart rate is controlled by what region of the brain?
- Medulla oblongata
- Frontal lobe
- ...is secreted from the pituitary gland and maintains the uteral lining (if a fertilised egg has attached).
- ...is secreted from the pituitary gland and inhibits LH and FSH secretion up until a critical threshold, upon which they are in fact stimulated.
- ...is secreted from maturing follicles and inhibits LH and FSH secretion up until a critical threshold, upon which they are in fact stimulated.
- ...is secreted from the corpus luteum and maintains the uteral lining (if a fertilised egg has attached).
17. Summarise the differences between DNA and RNA.
- The backbone of DNA is based upon deoxyribose whereas RNA's backbone is based upon ribose, RNA uses uracil in place of thymine.
- The backbone of DNA is based upon ribose whereas RNA's backbone is based upon deoxyribose, RNA uses uracil in place of thymine.
- The backbone of DNA is based upon ribose whereas RNA's backbone is based upon deoxyribose, RNA uses uracil in place of adenine.
18. If a  mutates it may become a  which stimulates , leading to uncontrolled cell division, or a 
- 1: proto-oncogene, 2: oncogene, 3: cell division, 4: tumour
- 1: tumor suppressor gene, 2: oncogene, 3: cell division, 4: tumour
- 1: oncogene, 2: excitatory oncogene, 3: autolysis, 4: tumour
19. In myelinated neurons, depolarisation can only occur where?
- Nodes of ranvier
- Nodes of his
20. 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