IB SEHS HL2: TOPIC #3

Which represents the production of adenosine triphosphate (ATP) via the aerobic glycolysis system?

• PC + ADP → 1ATP + C

• glucose → pyruvate → 2 ATP + lactate + H⁺

• glucose → pyruvate + O₂ → acetylCoA → Krebs cycle → electron transport chain → 38 ATP + H₂O + CO₂ + heat

• ADP + P = ATP

Which process occurs when blood glucose levels are decreased?

• Glycolysis

• Lipolysis

• Glycogenolysis

• Glycogenesis

Where is glycogen primarily stored in the body?

• The liver and brain

• The heart and lungs

• The stomach and intestines

• The kidneys and bladder

Which outlines lipolysis?

• Two glucose molecules combine to form a disaccharide

• One glycerol and three fatty acids combine to form a triglyceride

• One disaccharide breaks down to form two glucose molecules

• One triglyceride breaks down to form glycerol and three fatty acids

What is the main fuel source for an elite athlete in a 400 m running race?

• A.  Creatine phosphate

• B.  Glycogen

• C.  Lactic acid

• D.  Amino acid

Which is a polysaccharide?

• A.  glucose

• B.  glycogen

• C.  glucagon

• D.  triacylglycerol

Which best defines metabolism?

• A.  The breakdown of complex organic compounds into smaller ones.

• B.  The controlled release of energy in the form of adenosine triphosphate (ATP) fromorganic compounds.

• C.  The production of larger biochemical molecules from smaller ones.

• D.  All of the biochemical reactions that occur within an organism to convert food to energy

Which metabolic process produces the greatest ATP yield?

• A.  ATP–CP system

• B.  Anaerobic glycolysis

• C.  Krebs cycle

• D.  Electron transport chain

Which is considered a micronutrient?

• A. lipid

• B. vitamin

• C. water

• D. protein

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

• A. glycogen

• B. glucoe-6-phosphate

• C. amino acid

• D. creatine phosphate