Stephen Hawking dismisses belief in God in an exclusive interview with the Guardian. Photograph: Solar & Heliospheric Observatory/Discovery Channel T he belief that heaven or an afterlife awaits us is a fairy story for people afraid of death, Stephen Hawking has said. In a dismissal that underlines his firm rejection of religious comforts, Britain's most eminent scientist said there was nothing beyond the moment when the brain flickers for the final time.
How are the tails and heads of membrane phospholipids oriented in their environment? a. The hydrophobic heads are oriented towards each other and the hydrophillic tails are oriented towards the extracellular fluid and the intracellular fluid.
Answers: The cell membrane is composed of a phospholipid bilayer. Facing both the extra and cytoplasmic sides of the cell are the hydrophilic heads. The hydrophobic tails of the phospholipids are clustered inside. Various proteins, sterols (e.g. cholesterol), lipids and carbohydrates are embedded in the plasma membrane.Some are peripheral, and are only one side of the membrane. Others are transmembrane. The cell membrane has various functions: Provides a semipermeable barrier for the cell from the outside world.nswers: The cell membrane is composed of a phospholipid bilayer. Facing both the extra and cytoplasmic sides of the cell are the hydrophilic heads. The hydrophobic tails of the phospholipids are clustered inside. Various proteins, sterols (e.g. cholesterol), lipids and carbohydrates are embedded in the plasma membrane.