The answer is; donation of a proton to water
Acids are proton donors. As viewed in the equation, the lactic acid partially dissociates in the water to form a conjugate base and hydronium ions. This is a property of an acid. The water acts as a base is donated a hydrogen ion be the lactic acid to form a conjugate acid H3O+.
Answer:
The Sun is the main source of energy for most organisms
Explanation:
Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.
The question is incomplete as it does not have the options which are:
A) are more fluid than the surrounding membrane.
B) are more rigid than the surrounding membrane.
C) are able to flip from inside to outside.
D) detach from the plasma membrane and clog arteries.
E) have higher rates of lateral diffusion of lipids and proteins into and out of the lipid rafts.
Answer:
B) are more rigid than the surrounding membrane.
Explanation:
Lipid rafts the are the domains of the plasma membrane which contain a high level of the sphingolipids and the cholesterol.
The fatty acid side chain of the phospholipids of the are more tightly packed and the saturated that the surrounding membrane of lipid and due to the rigid nature of the sterol group of cholesterol which holds the raft together the lipid rafts become more rigid than the surrounding bilayer.
Thus, Option-B is the correct answer.
Answer:
c. a molecule that intiates a signaling cascade in response to hormone binding on a cell membrane receptor and activating a G protein.
Explanation:
The second messenger is an intracellular signaling molecule that transmits signals within cells. These molecules are involved in the propagation of signals from the external to the intracellular medium.
These molecules promote initiation of intracellular signal transduction cascades. The second messenger needs to be active by some other molecule that is usually a hormone hormone. When activation occurs, a protein called Protein G changes the conformation of the second messenger by separating its alpha and beta-gamma subunits.
