In the Krebs cycle, how is citric acid formed? (1 point)
Pyruvic acid molecules
• are broken down by an acetyl group.
Enzymes combine
• hydrogen ions, oxygen, and electrons.
Acetyl-CoA joins with
• a large molecule called oxaloacetic acid.
Carbon dioxide bonds
• with a chain of coenzyme A.
The correct answer is:
Acetyl-CoA joins with a large molecule called oxaloacetic acid.
The following are steps of cellular respiration except (1 point)
O glycolysis
• the Krebs cycle
• electrolysis
electron transport chain
The correct answer is:
Electrolysis
Which molecule provides the activation energy that starts glycolysis? (Not which molecule is broken down during glycolysis)
(1 point)
• АТР
• sugar
• carbon dioxide
• water
?
The molecule that provides the activation energy that starts glycolysis is ATP (adenosine triphosphate).
During which phase of cellular respiration is carbon dioxide released? (1 point)
electron transport chain
• glycolysis
• digestion
• Krebs cycle
Which statement is true? (1 point)
Endotherms cannot insulate (stop heat loss from) their bodies and can only control their body temperature involuntarily.
Ectotherms cannot insulate (stop heat
• loss from) their bodies and can only control their body temperature by choice.Ectotherms can insulate (stop heat loss from) their bodies and can control their body temperature by choice.
Endotherms can insulate (stop heat
• loss from) their bodies but can only control their body temperature by choice.
The correct statement is:
Endotherms can insulate (stop heat loss from) their bodies but can only control their body temperature by choice.
Which activity uses ATP to raise body temperature? (1 point)
• shivering
• hibernating
• panting
• storing fats