Tommy is a 5-year-old white boy who is brought to a family practice office with a “runny” nose that started about 1 week ago but has not resolved. He has been blowing his nose quite frequently and “sores” have developed around his nose. His mother states, “The sores started as […]

Q. You want to study the biochemical properties of respiratory enzyme complexes required for oxidative phosphorylation. Your first goal is to measure proton pumping by the NADH dehydrogenase complex. You mix purified NADH dehydrogenase complex with phospholipids and a pH indicator dye that changes color at acidic pH, and you […]

1. The force of attraction that a -40.0 ?C point charge exerts on a +108 ?C point charge has magnitude 4.00 N. How far apart are these two charges? (k = 1/4??0 = 8.99 × 109 N · m2/C2) 2. What is the magnitude of a the vertical electric field […]

True or false 1. When bidirectional replication forks from adjacent origins meet, a leading strand always runs into a lagging strand. 2. Each time the genome is replicated, half the newly synthesized DNA is stitched together from Okazaki fragments. 3. Telomerase is a polymerase that carries its own RNA molecule […]