Answer:
The light-independent reactions initiate with carbon dioxide and culminate in glyceraldehyde-3-phosphate (G3P). Energy from ATP and NADPH generated in light-dependent reactions is utilized for this process.
Explanation:
Step 1: Carbon dioxide combines with ribulose biphosphate (RBP) to create a six-carbon sugar, which quickly breaks down into two molecules of 3-phosphoglycerate (3-PGA).
CO₂ + RBP ⟶ 2 3-PGA
Step 2. A phosphate group is added to 3-PGA, forming 1,3-bisphosphoglycerate (1,3-BPG).
3-PGA + ATP ⟶ 1,3-BPG + ADP
Step 3. NADPH facilitates the reduction of 1,3-BPG to G3P.
1,3-BPG + NADPH ⟶ G3P + NADP⁺
Most of the G3P is converted back into RBP, although some exits the cycle to form glucose.
The right choice is A. 110GPa
Explanation:
Pressure describes a force exerted on a surface or object, influenced by other objects or atmospheric factors. This is determined by the force applied along with the area. Moreover, this can be quantified using gigapascals (GPa), which is a unit commonly used in geology and related disciplines.
In the context provided, the lower mantle—situated beneath the upper mantle—exhibits pressure ranging from 24GPa to 130GPa, which is comparatively high when juxtaposed with surface pressures. Thus, the approximate pressure in this region is estimated at 110GPa, as it is the only value that fits within the specified pressure range, while the other pressures indicated are greater than what exists in this layer.
