Which of the following is true?A) Phospholipids can laterally diffuse along the plane of the membrane.B) Phospholipids frequentl
y flip-flop from one leaflet to the other.C) Phospholipids occur in an uninterrupted sheet, with proteins restricted to the surfaces of the membrane.D) Phospholipids are free to depart from the membrane and dissolve in the surrounding solution.E) Phospholipids have hydrophilic tails in the interior of the membrane.
Answer: A). Phospholipids can laterally diffuse along the plane of the membrane.
Explanation:
The phospholipids are the class of lipids that forms the major part of all the cell membranes. They are capable of forming the lipid bilayer because of the amphiphilic characteristic. The structure of these phospholipids molecules consists of two of the hydrophobic tails and also consists of hydrophobic head that consists of a phosphate group.
These phospholipids being in the lipid bilayer are capable of moving rotationally. These move laterally in one bilayer and they perform transverse movement in between the bilayers. The lateral movement is possible in membrane that exhibit a fluid structure.
To solve this just work backwards. The first box has Tt so one parent has to have T and the other t. Since the tall plant is on the top, it is T_ and t_. Next use the second box (tt). They are both t so the final answer is Tt x tt.
Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other. It is generally assumed that this process is driven by cross-bridges which extend from the myosin filaments and cyclically interact with the actin filaments as ATP is hydrolysed.