Answer:
The answer is It allows only certain materials to enter and exit the cell.
Very small things on the order of micrometers/smaller that cannot be resolved with a light microscope. Things like viruses, non mitotic DNA, certain bacteria/cells can only be resolved via an electron microscope.
Answer:
Gives us energy by providing energy to the cells inside our body. Carbohydrates in food are used first. When they are all used up, the body then uses fats, and then proteins as energy sources.
Answer:
Energy is required to disrupt a substrate’s stable electron configuration.
Explanation:
Activation energy is the energy required to initiate the chemical reaction. Activation energy is always kinetic energy. Activation energy is used to break the existing bonds of the substrate to destabilize it.
Breaking of existing bonds of the substrates creates a transition state which in turn has higher free energy than both reactants and products. Once the transition state is formed, the reaction proceeds towards the formation of the product.
Enzymes serve to lower down the activation energy for the reaction and thereby allow the reaction to occurs at a higher rate even at a normal temperature.
I believe the answer is -0.4