SFSU Bio 230 Study Guides for Exams 1, 2, 3, and 4 Questions and
Answers with Verified Solutions | Latest 2026 Update
Q: What is the first step of transforming light energy into chemical energy?
Answer:
What occurs during the light reactions of photosynthesis? Water is broken down by
sunlight energy and energy is stored in energy carriers (NADH and ATP) and oxygen
is released as waste.
Q: What occurs during the Calvin Cycle of photosynthesis?
Answer:
During the calvin cycle of photosynthesis, carbon dioxide is "fixed" into glucose and
energy carriers no longer have energy and are "returned" to the light reaction.
Q: What is the role of NADPH and ATP in photosynthesis?
Answer:
NADPH and ATP carry energy from broken down H2O molecules needed for fixing
carbon dioxide into glucose.
, SFSU Bio 230 Study Guides for Exams 1, 2, 3, and 4 Questions and
Answers with Verified Solutions | Latest 2026 Update
Q: Where do the 12 hydrogen atom in a molecule of glucose produced during
photosynthesis come from?
Answer:
The 6 oxygen atoms? The 6 carbon atoms? The hydrogen atoms come from water,
and the oxygen and carbon atoms come from carbon dioxide.
Q: "Plants get their food from the soil." Why would a biologist disagree with this
statement?
Answer:
What is meant by food in this statement? Because plants make their own food--food,
in this case, is energy which is in the for of the sugar glucose.
, SFSU Bio 230 Study Guides for Exams 1, 2, 3, and 4 Questions and
Answers with Verified Solutions | Latest 2026 Update
Q: What experiment did van Helmont do to test the role of soil in plant growth?
Answer:
What question was he trying to answer? What evidence did he collect? What did he
conclude from his experiment and evidence? Do you agree with his conclusion that
the mass of the tree came from the water? Why or why not? What do you conclude
from his experiment and evidence? van Helmont had 200lbs of dirt and allowed trees
to grow for five years before weighing both. He found that the amount of soil stayed
the same but that the trees grew, meaning that their mass came from water. No
because, though water is needed in the process, mass comes from the glucose which
originates from carbon dioxide.
Q: What role does soil play in plant growth?
Answer:
What are examples of minerals and their importance to a living thing like a plant?
Where does the mass of an enormous tree come from? Soil? Air? Water? Sunlight?
Could you provide evidence as to why one of these is the origin of plant mass
, SFSU Bio 230 Study Guides for Exams 1, 2, 3, and 4 Questions and
Answers with Verified Solutions | Latest 2026 Update
Q: and the others are not?
Answer:
What would that evidence be? Soil provides support for the plants and their roots,
and also minerals such as nitrogen, phosphorous, and others. The mass of a tree
comes from the glucose is creates from carbon dioxide.
Q: What is the purpose of cellular respiration?
Answer:
How does it happen? What substances are involved? What organisms do this? When
do they do it? Where in a cell does respiration take place? What happens when an
organism stops respiring? To make energy (ATP). It happens through glcolysis,
transition reaction, krebs cycle, electron transport chain, and chemiosmosis. In the
cytoplasm and them the mitochondria. It dies.
Answers with Verified Solutions | Latest 2026 Update
Q: What is the first step of transforming light energy into chemical energy?
Answer:
What occurs during the light reactions of photosynthesis? Water is broken down by
sunlight energy and energy is stored in energy carriers (NADH and ATP) and oxygen
is released as waste.
Q: What occurs during the Calvin Cycle of photosynthesis?
Answer:
During the calvin cycle of photosynthesis, carbon dioxide is "fixed" into glucose and
energy carriers no longer have energy and are "returned" to the light reaction.
Q: What is the role of NADPH and ATP in photosynthesis?
Answer:
NADPH and ATP carry energy from broken down H2O molecules needed for fixing
carbon dioxide into glucose.
, SFSU Bio 230 Study Guides for Exams 1, 2, 3, and 4 Questions and
Answers with Verified Solutions | Latest 2026 Update
Q: Where do the 12 hydrogen atom in a molecule of glucose produced during
photosynthesis come from?
Answer:
The 6 oxygen atoms? The 6 carbon atoms? The hydrogen atoms come from water,
and the oxygen and carbon atoms come from carbon dioxide.
Q: "Plants get their food from the soil." Why would a biologist disagree with this
statement?
Answer:
What is meant by food in this statement? Because plants make their own food--food,
in this case, is energy which is in the for of the sugar glucose.
, SFSU Bio 230 Study Guides for Exams 1, 2, 3, and 4 Questions and
Answers with Verified Solutions | Latest 2026 Update
Q: What experiment did van Helmont do to test the role of soil in plant growth?
Answer:
What question was he trying to answer? What evidence did he collect? What did he
conclude from his experiment and evidence? Do you agree with his conclusion that
the mass of the tree came from the water? Why or why not? What do you conclude
from his experiment and evidence? van Helmont had 200lbs of dirt and allowed trees
to grow for five years before weighing both. He found that the amount of soil stayed
the same but that the trees grew, meaning that their mass came from water. No
because, though water is needed in the process, mass comes from the glucose which
originates from carbon dioxide.
Q: What role does soil play in plant growth?
Answer:
What are examples of minerals and their importance to a living thing like a plant?
Where does the mass of an enormous tree come from? Soil? Air? Water? Sunlight?
Could you provide evidence as to why one of these is the origin of plant mass
, SFSU Bio 230 Study Guides for Exams 1, 2, 3, and 4 Questions and
Answers with Verified Solutions | Latest 2026 Update
Q: and the others are not?
Answer:
What would that evidence be? Soil provides support for the plants and their roots,
and also minerals such as nitrogen, phosphorous, and others. The mass of a tree
comes from the glucose is creates from carbon dioxide.
Q: What is the purpose of cellular respiration?
Answer:
How does it happen? What substances are involved? What organisms do this? When
do they do it? Where in a cell does respiration take place? What happens when an
organism stops respiring? To make energy (ATP). It happens through glcolysis,
transition reaction, krebs cycle, electron transport chain, and chemiosmosis. In the
cytoplasm and them the mitochondria. It dies.
