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1. Which of the following genes are regulated by the presence of sugars? (Select all that apply.) a. LacA, which codes for transaminase b. LacI, which codes for the lac repressor c. LacY, which codes for permease d. LacZ, which codes for beta-galactosidase - Answer a. LacA, which codes for transaminase, c. LacY, which codes for permease, and d. LacZ, which codes for beta-galactosidase 1. In normal bacteria, when is the lac operon repressed? (Select all that apply.) a. In the presence ...

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BIO 250 | Microbiology Final Exam Questions and Answers (Graded A+ 2023) Straighterline. An irregular cluster of spherical cells would be called a/an a. Palisades b. Sarcina c. Staphylococcus d. Streptococcus e. Spirilla 2. The study of the immune response to infection caused by microorganisms is a. Hypersensitivity b. Epidemiology c. Immunology d. Morbidity e. Geomicrobiology 3. What is the maximum number of electrons in the first energy shell of an atom? a. 2 b. 4 c. 8 d. 18 e...

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BIO 250 FINAL EXAM

What is community ecology? the study of interactions between species and how they influence community structure and function Ecologists define a community as: species within a particular place that interact or potentially interact Disturbance: A discrete event that disrupts an ecosystem or community Succession: the repeatable change in community composition through time following a disturbance Succession is affected by: self thinning, life history traits Primary succession: initial establis...

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A pure culture A) is sterile. B) is a population of identical cells. C) is made of a precisely defined chemical medium. D) contains one microbial cell. correct answers b Microbial cells first evolved on Earth approximately ________ _______ years ago. A) 1.6 to 1.8 million B) 7.0 to 7.2 million C) 3.8 to 3.9 billion D) 10.5 to 11.5 billion E) None of the above correct answers c Predict how Pasteur's conclusions on spontaneous generation with swan flasks would have changed if he w...