Biology lab final exam - Study guides, Class notes & Summaries

Microbiology Lab Final Exam 2024, 223 Questions and Correct Answers.

Microbiology Lab Final Exam Questions and Answers agent that kills bacteria upon exposure -Answer-bacteriocidal agent naturally produced by microorganisms -Answer-antibiotic agent that slows the growth of bacteria -Answer-bacteriostatic agent artificially synthesized or manipulated from other products -Answer-antimicrobial targets DNA gyrase, preventing DNA replication within a cell -Answer-novobiocin Disrupts cell wall stability, eventually leading to cell lysis -Answer-penicillin binds ...

humans have how many chromosomes? correct answer: 23 pairs Diploid Cell correct answer: 2n (2 of every chromosome) Haploid correct answer: N (1 copy of every chromosome) Are sex cells diploid or haploid? correct answer: haploid Cell cycle consists of what stages correct answer: G1, S, G2, and M phases Interphase correct answer: the chromatin is unraveled, or dispersed throughout the nucleus and is essentially invisible as individual structures During interphase correct an...

Microbiology LAB Final Exam LSUE with correct Answers.

Cotton plugs or screw caps are used in test tubes containing sterile media or pure cultures to - a. Prevent unfiltered air or dust particles from entering the tubes, maintain anaerobic conditions and prevent the culture from spilling The pH indicator in Simmon's citrate agar is what? - a. Bromthymol Blue Bacteria that show no preference, grow equally well in aerobic or anaerobic conditions are - a. Facultative The protein that DOES NOT give milk its white color is - a. Albumin Beef extra...

Whether in a gas, a liquid, or a semisolid, diffusion always occurs. correct answer: from high to low solute concentration Which dye would you predict to move the fastest (and thus go furthest in a given time period) through agar? correct answer: Potassium permanganate (mw= 158) The spreading out of molecular from a center of higher concentration is the result of correct answer: The random movements of molecules What determines the direction of diffusion? correct answer: concentrati...

During DNA replication, correct answer: each parental strand serves as a template for the synthesis of a complementary strand How would the shape of a DNA molecule change if adenine paired with guanine and cytosine paired with thymine? correct answer: The DNA molecule would have irregular widths along its length. Which of the following is true about double-stranded DNA? correct answer: Its strands have a sugar-phosphate backbone. Why is DNA extraction and isolation an important labor...

Microbiology Lab Final Exam Practice Questions and Answers (100% Pass)

Microbiology LAB Final Exam LSUE Exam Questions With 100% Correct Answers. Cotton plugs or screw caps are used in test tubes containing sterile media or pure cultures to a. Prevent unfiltered air or dust particles from entering the tubes, maintain anaerobic conditions and prevent the culture from spilling The pH indicator in Simmon's citrate agar is what? a. Bromthymol Blue Bacteria that show no preference, grow equally well in aerobic or anaerobic conditions are a. Facultative The pro...

Proteins that act as catalysts; or a protein that functions as a catalyst for a chemical reaction. - correct answer -Enzymes Substances that regulate the rate of chemical reactions but do not unite permanently with reactants - correct answer -Catalysis Heat, acids, and bases break the weak hydrogen bonds holding the protein together. This ruins the unique shape of the protein in a process called....? - correct answer -Denaturation The region of the enzyme where contact is made between t...