KINESIOL2CC3 Test 1

Which of the following scenarios would have the greatest enzyme activity?

• Low substrate concentration, Presence of Inhibitors
• Low substrate concentration, Presence of Stimulators
• High substrate concentration, Presence of Inhibitors
• High substrate concentration, Presence of Stimulators

When is the phosphagen breakdown system NOT heavily relied upon?

• Prolonged Exercise
• Workload transitions in exercise
• High Intensity Exercise
• Transitions between intensities

How many more ATP units would you get by utilizing non-oxidative glycolysis in comparison to using phosphagen stores?

• 1x more
• 2x more
• 4x more
• 5x more

Why would athletes running an 800m race take sodium bicarbonate as a possible strategy before their run?

• Because it delays an acidic pH environment
• Because it prevents lactate build-up throughout the race
• Because it is a good buffer for ATP loss
• Because it is a stimulator for enzyme activity

Which enzyme in non-oxidative glycolysis is used to trap blood glucose after it has been transported into skeletal muscle cells?

• Phosphofructokinase (PFK)
• Glycogen phosphorylase
• GLUT transporter
• Hexokinase

What enzyme plays a role in regulating the entry of carbohydrates in the mitochondria during carbohydrate oxidation?

• B-HAD
• Citrate synthase
• Carnitine palmitoyl transferase (CPT)
• Pyruvate dehydrogenase (PDH)

Which of the following states the correct coenzyme yield for 2 x 6-C "glucose unit" cleaved from glycogen.

• 20 NADH, 4 FADH2
• 18 NADH, 4 FADH2
• 16 NADH, 6 FADH2
• 14 NADH, 6 FADH2

Which amino acid carries the amino group during protein metabolism?

• Leucine
• Isoleucine
• Valine
• Alanine

Which of the following is the best answer to describe the limitation to phosphagen stores?

• Metabolite accumulation
• Limited substrate capacity
• Oxygen availability
• Long usable capacity

What is the benefit of lactic acid build-up?

• Helps the body maintain an optimal pH
• Re-synthesis of NAD+
• Promotes production of acetyl-coA from pyruvate
• No benefit