IB SEHS Option A

Which process occures when blood glucose levels are decreased?

• Glycolysis

• Lipolysis

• Glycogenolysis

• Glycogenesis

What is the composition of triacylglycerol (triglyceride)?

• Three glycerol and one fatty acid molecules

• One glucose and three fatty acid molecules

• One glycerol and three fatty acid molecules

• Three glucose and one fatty acid molecules

What is a function of adrenaline?

• Increases stimulation of the parasympathetic nervous system

• Increases heart rate

• Decreases glycogenolysis

• Decreases heart rate

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What is the definition of cell respiration?

• The controlled release of energy in the form of adenosine triphosphate (ATP) from organic

  compounds in cells

• The controlled release of energy in the form of adenosine diphosphate (ADP) from organic

  compounds in cells

• The controlled release of energy in the form of glycogen from organic compounds in cells

• The controlled release of energy in the form of carbon dioxide from organic compounds

  in cells

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Which energy system is the predominant contributor of ATP for a runner participating in a marathon?

• ATP–PC system

• Anaerobic system

• Lactic acid system

• Aerobic system

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Where is glycogen primarily stored in the body?

• The liver and brain

• The liver and skeletal muscle

• Cardiac muscle and the brain

• Cardiac muscle and the liver

Which donates a phosphate group to adenosine diphosphate (ADP) during the initial stages of intense exercise to regenerate adenosine triphosphate (ATP)?

• Glycogen

• Glucose-6-phosphate

• Amino acid

• Creatine phosphate

Which is a condensation reaction?

• Breaking of the bonds in glycogen and creation of a water molecule

• Addition of two glucose molecules and creation of a water molecule

• Breaking of the bonds in glycogen and absorption of a water molecule

• Addition of two glucose molecules and absorption of a water molecule

What is an anabolic reaction?

• When small molecules are combined into larger molecules

• When complex molecules are broken into smaller molecules

• When there is a net release of energy

• When no energy is used or released within the reaction

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The diagram shows the ultrastructure of a generalized animal cell. What is the main function of the organelle labelled X?

*Make sure to look at the picture.

• Protein synthesis

• Digestion of macromolecules

• Cellular respiration

• DNA storage

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