they use energy from sunlight to produce oxygen and convert ADP to NADP+
They would use a membrane transport protein.
There are several different types that it can use, but large macromolecules use these membrane transport proteins like channels to enter and leave the cell
It is c I believe cause the human cells can’t make their own food like plants do when they photosynthesis
The sole reason why red blood cells are unable to replace damaged proteins is that red blood cells lack DNA and cell organelles such as nucleus, ribosomes and mitochondria which are crucial for protein synthesis, assembly and repair. In other words they lack both the information and the machinery for making or repair of proteins.
Due to lack of DNA and cell organelles, red blood cells cannot be able satisfy the central dogma which summarizes synthesis of proteins as DNA → RNA → proteins.
DNA has the genetic information on how proteins should be made, RNA is responsible for transferring the information from DNA in the cell nucleus to the ribosomes in the cytoplasm, then translating or decoding this information, which results in the making of protein.
