Question

like cellular respiration, the many steps and molecular machines involved in photosynthesis can be grouped into a small number of major stages. photosynthesis has three stages:
stage 1: energy in specific wavelengths of light is absorbed by molecules called pigments. this energy absorption results in electrons being excited to a high - energy state. in one of the photosynthesis machines called photosystem ii (psii), excited electrons are passed to a molecule called pq—reducing it. pq is similar to the electron carrier q in cellular respiration. this step accomplishes the transformation of light energy to chemical energy. pq then carries the high - energy electron out of psii and passes it to an electron transport chain (etc). energy transfer during a series of redox reactions allows the etc to pump protons across a membrane, driving production of atp by atp synthase.
stage 2: in pigment molecules associated with a different machine called photosystem i (psi—so - named because it was discovered first), excited electrons are passed through a series of carriers until they reach an enzyme that uses the energy to catalyze the reduction of a molecule called nadp+. the reduced form of nadp+, nadph, is an electron carrier very similar to nadh in cellular respiration.
stage 3: the atp and nadph produced from the energy harvested in psii and psi are not used in cellular respiration. instead, they are used in a series of reactions called the calvin cycle that results in the reduction of co2 to produce sugars.
the reduction of nadp+ to nadph completes the transformation of light energy captured in psi to chemical energy.
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the essence of photosynthesis is the transformation of light energy to chemical energy in the c - c and c - h bonds found in sugars, and it all begins with pigments absorbing photons. lets start there, then take a closer look at what is happening with excited electrons in psii and psi.
did you fully understand the concept covered in this

Explanation:

According to the text, in Stage 2 (associated with PSI), excited electrons are passed through carriers until they reach an enzyme that uses the energy to catalyze the reduction of \(NADP^{+}\) to \(NADPH\), and this reduction completes the transformation of light energy captured in PSI to chemical energy.

Answer:

True