The answer to the question is (A.)
Answer:
Glycolysis - cytoplasm
Kerb's cycle- mitochondrial matrix
Electron transport chain- inner mitochondrial membrane
Explanation:
Glycolysis is the first step of cellular respiration. The process of glycolysis occurs in the cytoplasm of the cell and this process is not dependent on oxygen. In glycolysis the glucose is partially oxidized into pyruvate molecules.
This pyruvate is fully oxidized in the Kreb's cycle which occurs in the matrix of mitochondria. NADH produced during the Kreb cycle and glycolysis feeds electron in the electron transport chain which is present in the inner mitochondrial membrane. This feeding of electron allows the formation of ATP and the process is called oxidative phosphorylation.
Answer:
Oxygen would be played a key role in evolution of complex organisms because this molecule is required to efficiently produce chemical energy during cellular respiration
Explanation:
Chloroplasts originated from endosymbiotic cyanobacteria 1,500 million years (mya) ago. Like chloroplasts, mitochondria originated from cyanobacteria, and also approximately at the same time. Mitochondria are organelles capable of generating energy by burning oxygen during cellular respiration (aerobic respiration). During this period (1,500 mya), complex cells became able to efficiently produce energy by using oxygen in aerobic reactions, which can be attributed to the emergence of mitochondria. Interestingly, it has been shown that during the next 500 mya, different groups of organisms composed of more than 50 different cell types evolved (including algae, fungi and early animals). Therefore, it is possible to hypothesize oxygen would be a critical molecule without which complex organisms couldn't evolve.
Zygote is the cell that makes fertilization possible
