Flip-flop

Surfing has grown exponentially over the past several decades and with it surf brands have exploded and surfing has become considerably more marketable. However, at one point in time, this did not seem like it would ever be possible. In the 1960’s there was a vast expansion of surf culture, but before that surfing was not seen as a popular activity. The counter-culture ways that were associated with the sport created a view that surfers were slackers and druggies as their time was largely spent…

124–125 TEXTBOOK SELF-QUIZ 1. Which statement about membrane phospholipids is not true? a. They associate to form bilayers. b. They have hydrophobic “tails.” c. They have hydrophilic “heads.” d. They give the membrane fluidity. e. They flip-flop readily from one side of the membrane to the other. Answer: e 2. When a hormone molecule binds to a specific protein on the plasma membrane, the protein it binds to is called a a. ligand. b. clathrin. c. receptor…

While ubiquitous Internet access is extremely convenient and enables marvelous new applications for mobile users, it also creates a major security vulnerability—by placing a passive receiver in the vicinity of the wireless transmitter, that receiver can obtain a copy of every packet that is transmitted! These packets can contain all kinds of sensitive information, including passwords, social security numbers, trade secrets, and private personal messages. A passive receiver that records a copy of…