Biology Questions

Gene is a segment of chromosomal DNA or a sequence of DNA or RNA that codes for a molecule that has a function. It is the basic physical and functional unit of heredity.

As genes are made up of DNA it impies that they are long, double chains of nucleic acids as DNA is made of nucleic acids.

ATP - Adinosine Triphosphate is the compound that directly provides energy for cellular work.

The light reactions of photosynthesis supply the calvin cycle with ATP and NADPH.

The oxygenated blood  flows through pulmonary veins then leaves the lungs, which return it to the left heart, completing the pulmonary cycle.

Protein synthesis take place in the cytoplasm where ribosomes are located as they are the machinery which are responsible for the protein synthesis.