N-fixation exclusive to microbes
What will be an ideal response?
Plant-assimilated NH4+ drives AA production and provides reducing power
This is catalyzed by nitrogenase, a 2-component enzyme complex
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In correct chronological order, the three phases of the human ovarian cycle are _____
A) menstrual ? ovulation ? luteal B) follicular ? luteal ? secretory C) menstrual ? proliferative ? secretory D) follicular ? ovulation ? luteal E) proliferative ? luteal ? ovulation
Answer the following statements true (T) or false (F)
1. Myosin is a motor protein that walks along intermediate filaments. 2. The flagellum is composed of a 9 + 2 arrangement of microtubules called the axoneme. 3. The Golgi apparatus is much like a warehouse; it processes proteins and sorts them for delivery to certain parts of the cell. 4. Materials move in and out of the nucleus via endocytosis and exocytosis. 5. Both lysosomes and peroxisomes are important for detoxifying substances in the cell.
Why did local residents in the Pacific Northwest remain hostile to conservation efforts?
a. When the northern spotted owl was listed as endangered, logging workers lost jobs. b. The northern spotted owl has not been listed as endangered. c. When the northern spotted owl was listed as endangered, the logging industry experienced a boom. d. Conservation efforts to protect trees from logging have been unsuccessful. e. Conservation efforts focus on the local population and take their jobs into consideration.
Once a macrophage engulfs a bacterium, what happens to the foreign cell?
A) It is released into the lymph system for removal from the body. B) It is released into the digestive tract for removal from the body. C) The macrophage is attacked by antibodies, killing the cell and bacterium. D) Antibodies penetrate the macrophage to lyse the bacterial cell. E) The bacterium is killed by digestive enzymes released from lysosomes.