Question

In light phase of photosynthesis there is formation of
A. ATP
B. NADPH2
C. Both ATP and $NADPH-2$
D. Carbohydrates

Answer 1

Hint:The PSI and PSII absorb the sunlight, increasing the electrons' energy to values greater than their original state. This energy is transferred by numerous chlorophyll molecules, until the water is divided into the following elements in the middle of Photosystem II: two protons (H+), one oxygen atom (O) and two electrons.

Complete answer
First we should know about the light phase of photosynthesis to answer this question. The light phase is just the first photosynthesis process, when light is captured by chlorophyll and protein complexes called photosystems which are located in the chloroplast. Solar energy is transformed in chemicals during this process.
 Now, let us find the solution from the options-
- In light-dependent reactions chlorophyll consumes the energy from sunlight and transforms it into chemical energy in the form of electron carrier molecules such as ATP and NADPH.
-In Photosystems I and II, which are both embedded in chloroplast thylakoid membranes, light energy is harnessed.
-Sunlight needs light-dependent reactions.
-In light-dependent reactions, electron carrier molecule NADPH (nicotinamide adenine dinucleotide phosphate) as well as energy currency molecule ATP (adenosine triphosphate) are consumed by chlorophyll and transformed into reserved chemical energy.
- The light-dependent reactions occur inside the chloroplast, in the thylakoid membranes in the granum (thylakoid stack).

  Thus, the correct option is option (C) i.e. Both ATP and $NADPH_2$.

Note:In general, the light energy that consumes chlorophyll reacts to two unique wavelengths: 680 and 700 nm. Such two wavelengths excite one photosystem or the other.