1. Leaving Certificate Biology Respiration 2 iQuiz SECOND Press the F5 Key to Begin, Then click on this Blue Box FIRST In PowerPoint 2007 if you see a Security Warning click HERE on Options… and then click on  Enable this content

2. Which of the following carbohydrates has the most carbon atoms per molecule? SucroseStarch MaltoseGlucose

3. If all green plants were to become extinct, which of the following would disappear first? NitrogenOxygen Carbon dioxideWater vapour

4. What is the approximate percentage of oxygen in the air we breathe out? 5%20% 10%15%

5. When a molecule of oxygen is breathed into the body which of the following structures would it reach last? Pulmonary veinBronchiole AlveolusBronchus

6. What is the approximate percentage of oxygen in the air we breathe in? 10%15% 25%20%

7. Which of the following is not connected with breathing? AlveoliOesophagus Intercostal muscles Trachea

8. Taking air, containing 20% oxygen, into the lungs is also known as … InspirationBreathing Cell respirationExpiration

9. Expelling air, containing 16% oxygen, from the lungs is also known as … BreathingExpiration Cell respirationInspiration

10. Which of the following prevents food entering the larynx during swallowing? BronchusGlottis EpiglottisAlveolus

11. ATP is used directly in which of the following processes? GrowthReproduction RespirationExcretion

12. Yeast cells during anaerobic respiration produce carbon dioxide and … Lactic acidEthanol WaterCitric acid

13. The purpose of respiration is to … Burn excess sugars Provide energy for cells Use oxygen in cells Produce carbon dioxide

14. Stage 1 of respiration is called … Lactic acid cycleNADH cycle GlycolysisKreb’s cycle

15. In what part of the cell does Stage 1 of respiration take place? RibosomesNucleus MitochondriaCytoplasm

16. In the presence of oxygen, pyruvic acid enters the mitochondria, loses a molecule of CO 2 and two hydrogen atoms to become … Lactic acidAcetyl coenzyme A EthanolNADH

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