Microbiology Straighterline Exam 2024/2025 Questions with 100% Verified Answers

Microbiology Straighterline Exam 2024/2025 Questions with 100% Verified Answers ________ molecules deliver amino acids to ribosomes during translation. a. Messenger RNA (mRNA) b. Transfer RNA (tRNA) c. Ribosomal RNA (rRNA) d. Heterogeneous nuclear RNA (hnRNA) - b. Transfer RNA (tRNA) __________ alter repressor proteins thereby increasing the rate of transcription initiation. a. Inducers b. Corepressors c. Effectors d. Modulators - a. Inducers __________ is a measure of the randomness or disorder of a system. a. Entropy b. Enthalpy c. Free energy d. Synergy - a. Entropy ______________ is used to control transcription of some anabolic pathways involved in amino acid biosynthesis. a. Attenuation b. Catabolite repression c. Induction d. All of the choices are correct. - a. Attenuation __________________ are hollow tube-like structures that hold some archaeal daughter cells together after cell division while____________ are grappling hook-like structures that appear to attach archaeal cells to surfaces. a. Pili; hami b. Cannulae; hami c. Hami; fimbriae d. Cannulae; pili - b. Cannulae; hami 0.2 mls of a 10^-4 dilution of a virus preparation yields 90 plaques. What is the number of PFU per ml in the undiluted virus preparation? a. 9.0 × 10^5 b. 4.5 × 10^6 c. 4.5 × 10^7 d. 9.0 × 10^8 - b. 4.5 × 10^6 A basidium... a. is found within basidiocarp (fruiting body). b. is produced at the tip of hyphae. c. is club-shaped. d. All of the choices are correct. - d. All of the choices are correct. A culture system with constant environmental conditions maintained through continual provision of nutrient and removal of wastes is called __________ culture system. a. continuous b. batch c. fed-batch d. semicontinuous - a. continuous A general term used to describe groups based on mutual similarity or evolutionary relatedness is ______. a. class b. taxa c. system d. group - b. taxa A graduate student is researching the spread of mosquito vectors and dengue fever into the southern United States. She has collected a substantial amount of data regarding the locations where the vector has been detected as well as the incidence of the dengue fever virus in both the vector population and in humans. What application would enable her to effectively illustrate patterns of vector and disease spread? a. Geographic Information Systems b. Remote sensing c. DNA microarrays d. DNA fingerprinting - a. Geographic Information Systems A major fungal genus that produces aflatoxin is a. Rhizopus. b. Aspergillus. c. Claviceps. d. Penicillium. - b. Aspergillus.