Study Guide.
Cells use a molecule called ---------
to store and release energy like a battery. The energy is stored in chemical bonds between
-------------
groups of the molecule, and the energy is released when the chemical bonds are broken.
✔✔✔ --ATP
--phosphate
Betel is developing a model of the process of photosynthesis. One of her goals is to identify
the products of photosynthesis that will later be used to assemble sugars, lipids, amino
acids, and other essential compounds for the organisms. In which part of the model should
these products be identified? ✔✔✔ in the light-independent reactions, where 3-carbon
sugars exit the cycle
Which statement best describes the relationship between adenosine diphosphate (ADP)
and adenosine triphosphate (ATP)? ✔✔✔ With an input of energy, ADP combines with a
phosphate group to become ATP.
Neurons are cells of the nervous system. As part of its normal function, a neuron pumps
sodium ions (Na+) out of the cell and potassium ions (K+) into the cell. Which statement
describes the role of energy in this process? ✔✔✔ The process requires energy that is
provided by ATP.
The chemical formula for glucose, a simple sugar, is C6H12O6. When a glucose molecule
is assembled during photosynthesis, the process takes up 12 hydrogen ions from the
stroma of the chloroplast. What process adds 12 hydrogen ions to the chloroplast? ✔✔✔ 6
water molecules splitting apart during the light-dependent reactions
A mushroom gains its energy by decomposing the tissues of dead organisms. Should
mushrooms be classified as autotrophs, heterotrophs, in both groups, or in neither group,
and for what reason? ✔✔✔ They are heterotrophs because their food is made by other
organisms.
Vernon wonders whether NADPH and ATP should be classified as reactants or as
products of photosynthesis. How should these compounds be classified? ✔✔✔ as neither
reactant nor product, because they are recycled instead of made or used up
Briana is studying a model of the light-dependent reactions of photosynthesis. The
diagram shows a part of this model.
Briana notices the electrons that the water molecules release. She asks, "Will the
electrons build up in the chloroplast?" Which addition to the diagram would be most useful