If one strand of DNA has 24% T, it would have 26% G.
The electrons that chlorophyll loses in the electron transport chain are replenished by water molecules. These water molecules degrade releasing oxygen and hydrogen, the electrons are then supplied to the electron deficient chlorophyll molecules located in the reaction centre of the Photosystem.
A nucleus is the control center of a cell.
This could be because star A is closer to Earth than star B is, making it appear brighter.
The answer is C because hydrogen bonding can only take place in polar molecules with hydrogen atoms
