What is the fundamental source of energy in the food you eat?
plants
photosynthesis
sugar
sun***
Positive hydrogen ions form during intermediate stages of photosynthesis. What is the composition of these ions?
a single proton***
two protons and an electron
a proton and two electrons
a proton and an electron
Which statement is true?
The Calvin cycle is the light-dependent stage of photosynthesis and occurs in the thylakoid membrane.
The Calvin cycle is the light-independent stage of photosynthesis and occurs in the thylakoid membrane.
The Calvin cycle is the light-independent stage of photosynthesis and occurs in the stroma.***
The Calvin cycle is the light-dependent stage of photosynthesis and occurs in the stroma.
Higher energy contained in the sugar molecules produced by photosynthesis comes from
light.***
water molecules.
ATP.
carbon dioxide molecules.
Which equation best summarizes cellular respiration?
6H2O + 6CO2 → C6H12O6 + 6O2 + Energy
6H2O + 6CO2 + Energy → C6H12O6 + 6O2
C6H12O6 + 6O2 + 6CO2 → 6H2O + Energy
C6H12O6 + 6O2 → 6H2O + 6CO2 + Energy***
Which statement is true?
Fats have a lower amount of energy than carbohydrates.
Fats and proteins have the same amount of energy.
Carbohydrates have a higher amount of energy than proteins.
Proteins and carbohydrates have the same amount of energy.***
In the Krebs cycle, how is citric acid formed?
Pyruvic acid molecules are broken down by an acetyl group.
Acetyl-CoA joins with a large molecule called oxaloacetic acid.***
Carbon dioxide bonds with a chain of coenzyme A.
Enzymes combine hydrogen ions, oxygen, and electrons.
The following are components of cellular respiration except
electron transport chain.
glycolysis.
electrolysis.***
the Krebs cycle.
Which macromolecule provides the energy that starts glycolysis?
ATP***
sugar
carbon dioxide
water
During which phase of cellular respiration is carbon dioxide released?
Krebs cycle
electron transport chain***
digestion
glycolysis
Which compound is a reactant in cellular respiration?
oxygen***
water
ATP
carbon dioxide
How many O2 molecules are required for two glucose molecules to undergo cellular respiration?
18
2
12***
6
Which statement is true?
Endotherms can insulate their bodies but can only self-regulate their body temperature voluntarily.
Endotherms cannot insulate their bodies and can only self-regulate their body temperature involuntarily.
Ectotherms can insulate their bodies and can self-regulate their body temperature voluntarily and involuntarily.
Ectotherms cannot insulate their bodies and can only self-regulate their body temperature voluntarily.***
Which activity uses ATP to raise body temperature?
hibernating
storing fats
panting
shivering***
All correct, 100% :)
To find the fundamental source of energy in the food we eat, we can identify that the energy ultimately comes from the sun. Plants use photosynthesis to convert sunlight into sugar molecules, which then serve as the primary energy source for all living organisms.
During photosynthesis, positive hydrogen ions are formed in intermediate stages. These ions consist of a single proton.
The statement that is true is that the Calvin cycle is the light-independent stage of photosynthesis and occurs in the stroma. The Calvin cycle does not require light and takes place in the stroma, which is the fluid-filled space within the chloroplasts.
The higher energy contained in the sugar molecules produced by photosynthesis comes from light. Sunlight is the initial source of energy that drives the process of photosynthesis.
The equation that best summarizes cellular respiration is C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy. In cellular respiration, glucose (C6H12O6) and oxygen (O2) are converted into carbon dioxide (CO2), water (H2O), and energy.
The statement that is true is that proteins and carbohydrates have the same amount of energy. Both macronutrients provide approximately 4 calories per gram.
In the Krebs cycle (also known as the citric acid cycle), citric acid is formed when Acetyl-CoA joins with a large molecule called oxaloacetic acid.
The component that is not part of cellular respiration is electrolysis.
ATP is the macromolecule that provides the energy that starts glycolysis. ATP is broken down into ADP (adenosine diphosphate) and inorganic phosphate, releasing energy in the process.
Carbon dioxide is released during the Krebs cycle phase of cellular respiration.
Oxygen (O2) is a reactant in cellular respiration. It is used to oxidize glucose and other organic molecules, releasing energy in the process.
For two glucose molecules to undergo cellular respiration, 12 O2 molecules are required. Each glucose molecule requires 6 O2 molecules for complete oxidation.
The statement that is true is that ectotherms cannot insulate their bodies and can only self-regulate their body temperature voluntarily. Ectotherms rely on external sources of heat to regulate their body temperature.
Shivering is an activity that uses ATP to raise body temperature. Shivering is a rapid muscle contraction and relaxation that generates heat as a byproduct of ATP breakdown.