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Rifamycin and actinomycin D are two antibiotics derived from the bacterium Streptomyces. Rifamycin binds to the b subunit of E. coli RNA polymerase and interferes with the formation of the first phosphodiester bond in the RNA chain. Actinomycin D bind to double stranded DNA by intercalation (slipping in between neighboring […]

1) Explain how a metabolic pathway can contain an energetically unfavorable reaction yet still occur. 2) What general factors contribute to the high phosphoryl-transfer potential of ATP? 3) Compare ATP to acetyl CoA. 4) What is the relationship between the energy charge of a cell and control of the ATP-generating […]

1. Alice, a 16 year old girl, dislikes seafood right from her childhood. This enduring dislike for seafood is an attitude that she cultured from her mother. Which of the following is the attitude object in this case? a. Alice’s mother b. Alice c. Seafood d. Alice’s childhood 2. Patrick […]

A Case Study on Bone Tissue Structure and Repair Mrs. Debbie Morgan is a 45-year-old female who works as a stocking clerk for a local home improvement store. While she was at work today a large box of metal rivets fell from a 20-ft.- high overhead shelf, striking her outstretched […]