First, the electron
transport chain transfer the electrons from electron donors to electron
acceptors using both reduction and oxidation reactions.
Next, the energy
released in these reactions is captured as an electrochemical proton gradient
that triggers the synthesis of ATP synthase and produce adenosine triphosphate
(ATP) from ADP and phosphate group in the process called chemiosmosis.
Lastly, ATP stores
energy chemically in the form of highly strained bonds and together, the
electron transport chain and chemiosmosis makes up the oxidative
phosphorylation which is found in the inner mitochondrial membrane.
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I believe it is B but I’m not 100% sure
The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old.
Answer and Explanation:
The cell division cycle is responsible for increasing and maintaining cell number and size. This cycle is an essential feature of living organisms. There are four phases of cell division mitotic phase (M phase), growth phase 1 (G1), growth phase 2 (G2), and synthesis phase (S). One phase of the cell cycle ends, and the other starts; this is named a phase transition—a unidirectional alteration in the cell cycle phases. During G1, G2, and S phase cell grows and during the M phase cell divides. There are two models of cell reproduction as the clock model and the domino model. The domino model implies that cell division phases must occur in a distinct order and at a definite time. The domino model recommends that the cell cycle events are independent, while the clock model shows that the effectiveness of mitosis entrance was not persuaded by other actions.
