Units 3 and 4 Biology - Practice Exam - Engage Education Foundation

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Units 3 and 4 BiologyThe Engage Education FoundationQuestion 2a. Explain why a yellow banana, when placed in a paper lunch bag with an overripe orange, willbecome brown within a day.2 marksb. Briefly complete the following table:Plant tropism orPositive / negative /hormonenot applicableresponsePhototropism ofplant tip towardssunlightHormone(s)responsibleBrief function of this /these hormonesGeotropism upout of the groundGrowth of lateralbudsFlowering4 marksTotal: 6 marksPage 196.5 hour revision seminars for just $56 – visit www.ee.org.au for more info.
The Engage Education FoundationUnits 3 and 4 BiologyQuestion 3The fight-or-flight response is a natural bodily response to potentially dangerous situations where stresshormones (adrenaline, for example) are released from the adrenal glands to prepare an animal for aresponse to danger. The response is characterised by actions such as shaking, tunnel vision,acceleration of heart/lung activity, increase in blood sugar levels and pupil dilation.a. Explain whether this is a nervous response, a hormonal response or both.2 marksThe production of the hormone adrenaline is a biological pathway characterised by a series of enzymecatalysedbiological reactions. The final step in this pathway begins with a hormone called noradrenaline,which not only works in a similar way to adrenaline, but is also converted to adrenaline by an enzyme inthe adrenal gland. Suppose a person is producing too much adrenaline, and is suffering adverse effectssuch as increased blood pressure, constantly raised metabolic rate, and feelings of anxiousness.b. Outline a potential drug that could be synthesised to overcome this.3 marksTotal: 5 markswww.engageeducation.org.au Page 20
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Units 3 and 4 Biology - Practice Exam - Engage Education Foundation

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