The biosynthesis of fatty acids and lipids meets two imperatives in the
cell :
- supply of fatty acids necessary for the synthesis of structural lipids;
- storage of energy.
The synthesis of fatty acids goes through a dehydration step during its synthesis. and its catabolism goes through a hydration stage, which shows the importance of H2O molecules to build lipids (even cholesterol).
Synthesis of the fatty acid:
firstly, acetyl-ACP and malonyl-ACP were condensed, followed by reduction of acetoacetyl-ACP to β-hydroxybutyryl-ACP, followed by dehydration of β-hydroxyacyl-ACP, and finally reduction of the double bond by NADPH + H
Catabolism:
The reverse steps will occur: a beta oxidation, a hydration of the molecule, and finally another oxidation.
Answer:
Like all organisms, humans compete with other species for basic needs in an ecosystem. Humans usually succeed because they have developed technology to help them. ... Humans have also introduced new elements to ecosystems, such as pollution. Pollution can affect all of the organisms in an ecosystem.
Explanation:
Answer:
In evolutionary biology, abiogenesis, or informally the origin of life (OoL), is the natural process ... For the oldest life forms, see Earliest known life forms. ... There are several principles and hypotheses for how abiogenesis could have occurred. ... In 2017 scientists found possible evidence of early life on land in 3.48 Gyo
Explanation:
Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects. We can only speculate about these questions, since we haven't yet found any life forms that hail from off of Earth. But we can think in a more informed way about whether life might exist on other ... When did life appear on Earth? ... For many millions of years, early Earth was pummeled by asteroids and other celestial objects.
Gymnosperms were the first plants to reproduce using NAKED SEEDS. ("Naked Seeds" include : <span>conifers, cycads, ginkgo)</span>
Answer:
Elerochemical gradient
Explanation:This coccus during the process of chemiosmosis in oxidative phosphorylation during cellular respiration. It is the electrochemical gradient that provides the energy needed by ATPase Synthase for the phosphorylation of ADP tp ATP, necessary for ATP production
The electochemical gradient is due to gradient produced from the pumping of protons by the proton motive force(PMF) into the intrammenbrane space. from the matrix.The accumulation leads the the production of electrochemical gradients because the Protons diffuse across from higher gradient in the intramembrsne space into the lower concentration gradient the matrix.Therefore,energy is produced as the diffusion takes place.
The ETC, is the source of generation of PMF, which pumps protons across into the intramembrane, for the electrochemical gradients productions
