MICROBIOLOGY EXAM 3 NEWEST COMPLETE 300 QUESTIONS AND CORRECT DETAILED ANSWERS

MICROBIOLOGY EXAM 3 NEWEST COMPLETE 300 QUESTIONS AND CORRECT DETAILED ANSWERS ( ANSWERS)

1 P a g e MICROBIOLOGY EXAM 3 NEWEST 2026-2027 EXAM COMPLETE 300 QUESTIONS AND CORRECT DETAILED ANSWERS ( ANSWERS) Which molecule provides the template that is directly used to make a protein in translation a. tRNA b mRNA c. the gene d. DNA - ANSWER- b. mRNA A bacteriophage (phage) infects a. bacteria b. mammals c. only humans d. arthropods e. any eukaryote - ANSWER- a. bacteria Which microorganism commonly produces endospores a. Enterobacter b. Proteus 2 P a g e c. Escherichis d. Clostridium - ANSWER- d. Clostridium Which type of RNA is used to make ribosomes a. DNA b. rRNA c. mRNA d. tRNA - ANSWER- b. rRNA Proglottids are a. viral structures b. prokaryotic structures c. reproductive structure in tapeworms d. none of the above - ANSWER- c. reproductive structures in tapeworms What is the final product of translation a. mRNA b. proteins c. amino acids d. DNA e. none of the above - ANSWER- b. proteins 3 P a g e What carries the amino acid to the correct spot on an mRNA molecule a. Ribosomes b. proteins c. tRNA d. codons - ANSWER- c. tRNA In the inducible lac-operon, when lactose is not present the operon is a. off, with no transcription occurring b. on, with transcription occurring c. neither, the presence of absence of lactose is not relevant - ANSWERa. off, with no transcription occurring Which genus of bacteria causes diarrhea with massive water and electrolyte loss and is transmitted through fecal contaminated water a. Bacillus b. Clostridium c. Escherichia d. Vibrio e. Proteus - ANSWER- d. Vibrio Which of the following is not a trait shared by both prokaryotic domains a. all are unicellular b. all have a plasma membrane c. both domains have organisms that can undergo methanogenesis 4 P a g e d. both domains have anaerobic and aerobic representatives - ANSWERc. both domains have organisms the can undergo methanogenesis Which of the following is acellular a. fungi b. protozoans c. algae d. bacteria e. viruses - ANSWER- e. viruses Place the following steps in a lytic infection in the correct order. 1- penetration, 2-release, 3-assembly, 4-attachment, 5-biosynthesis a. 1,2,3,4,5 b. 4,1,5,3,2 c. 4,1,3,5,2 d. 4,5,1,2,3 - ANSWER- b. 4,1,5,3,2 Which statement about Plasmodium is not correct a. it is transmitted by a mosquito b. it is endemic to over 100 countries c. it is an obligate intracellular parasite d. it causes Q fever - ANSWER- d. it causes Q fever