By the ligand receptors on the surface of the cell membrane. How do transport proteins make it easier for certain molecules to diffuse across a membrane.
the binding of a signaling molecule, or ligand, to its receiving molecule, or receptor.
Explanation:
When sandstone is overlaid by layers and layers of sediment, it becomes subject to enormous pressure and temperature beneath the layers and its grain structure begins to change. The force of compactness causes grain structure and size to reform. This is called metamophism., The sandstone becomes a new rock called quartzite. The two rocks will have different properties. Quartzite will have larger crystals and will be hard and smooth while sandstone will be coarse and soft.
Learn More:
For more on metamorphic rocks check out;
brainly.com/question/7669545
brainly.com/question/11972003
#LearnWithBrainly
I would say man made but not to sure with out answer choices..
Answer:
The DNA in eukrayotic cells is much more protected than the DNA in prokaryotic cells
Explanation:
DNA in eukaryotic cells lies within the nucleus. This DNA has a membrane protecting it from the outside. This means that the virus will have a harder time at getting to the DNA to insert its own DNA into it.
Prokaryotic cells have their DNA loose within the cytoplasm. This DNA is not protected. The virus will have to pass only 1 membrane in order to get to this DNA.
The aerobic system of energy production uses glycogen, but primarily glucose as its energy source.
Glucose is taken in by the cell and broken into pyruvate in the process of glycolysis, the first step in aerobic cell respiration. It takes place in the cell cytoplasm.
Pyruvate is then used in the Krebs cycle in the cell mitochondria in the second step of respiration which produces high energy electron carriers. These high energy electron carries such as NADP are then employed in the electron transport chain, the last step of the respiration process, where a large number of ATP molecules is produced.
By the time the process of aerobic respiration ends, 36 to 38 molecules of ATP are produced from one single molecule of glucose.
