Which of the following is NOT a reason why growth rates in nature are slower than those in the lab?
a. Microbes in nature grow in mixed populations.
b. Nutrient transport rates are slower in the environment.
c. Distribution of nutrients throughout habitat is not uniform.
d. Resources are frequently suboptimal.
Answer: B
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Which of the following would be true of an epithelium specialized for exchange by diffusion (e.g., a respiratory epithelium)?
A. thin with a relatively large surface area B. thick with a relatively large surface area C. thin with a relatively small surface area D. thick with a relatively small surface area E. thin with a small surface area/volume ratio
Answer the following statements true (T) or false (F)
1. DNA polymerase is a protein used in many biotechnology methods that cuts DNA sequences into fragments that can then be pasted into vectors. 2. The method of the polymerase chain reaction (PCR) is used to make enough exact copies of DNA for researchers to use in analysis. 3. Preimplantation genetic diagnosis uses DNA testing to examine the genes in sperm, egg, or embryo cells. 4. The desired outcome of human gene therapy is to find substitute genes from other organisms to cure a disease condition. 5. If farmers use glyphosate-resistant crops, they can spray their fields with a herbicides and it will not harm the plant.
Pure water without applied pressure has a water potential that is equal to
A. atmospheric pressure. B. 1.6 MPa. C. 0.0 MPa. D. infinity. E. -2.0 MPa.
What is the role of FMN in complex I?
A) Converts a two-electron transfer to a one-electron transfer. B) Converts a one-electron transfer to a two-electron transfer. C) Transports four H+ across the membrane. D) None, there is no FMN in complex I.