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Micr 271 Exam Questions And Correct Answers!

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11 pages

Written in 2024/2025

Grade A

QUINTER

What are bacterial genome replications like? - correct answer -circular chromosomes (similar to archaea) -bidirectional replication -begins at origin (oriC) -ends at termination site -next round can begin before 1st is over What happens when you replicate circular chromosomes of bacteria/what is the result (shape)? - correct answer Catenated chromosomes (interlocked) What separates interlocked chromosomes of ba...

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34 pages

Written in 2024/2025

Grade A+

RealGrades

MICR 271 Module 6 || Guaranteed Pass.

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24 pages

Written in 2026/2027

Grade A+

SirAnton

D - Answer Which of the following is a eukaryotic domain in the three-domain system? A. Archaea B. Fungi C. Bacteria D. Eukarya A - Answer Who was the first to observe microorganisms with a microscope? A. van Leeuwenhoek B. Hooke C. Koch D. Pasteur E. None of the above B - Answer These are the primary molecules making up membranes in cells: A. Proteins B. Phospholipids C. Nucleic acids D. Carbohydrates E. None of the above A - Answer Aerobic respiration differs...

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22 pages

Written in 2026/2027

Grade A+

TestSolver9

rod-shaped bacteria - Answer s. bacillus, pl. bacilli spherical bacteria - Answer s. coccus, pl. cocci common-shaped bacteria - Answer s vibrio, pl. vibrios spiral shapes bacteria - Answer s. spirillum, pl. spirilla pleiomorphic shaped bacteria - Answer varied shapes spirochetes - Answer spiral bacteria with axial filaments axial filaments - Answer special structure used for locomotion hyphae multicellular organization - Answer branching filaments of ...

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35 pages

Written in 2026/2027

Grade A+

TestSolver9

what is role of microbes in ocean? - Answer basis of food chain, and can decompose waste generated by others how do marine microbes interact with host? - Answer lyse host (bacteria, eukaryotes), releasing organic matter/nutrients into the environment what are example of functions of commensal bacteria in plants? - Answer promote plant growth, prevent pathogen. i.e. bacteria that fix nitrogen (use it to make aa's and nucleotides) how can behaviour impact microbiomes? - Answer...

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17 pages

Written in 2026/2027

Grade A+

TestSolver9

Bacterial populations grow through which process - Answer Binary fisison Binary fission begins with - Answer with replication of the baterial chromosome as an individual cell grows During the binary fission, further cell growth leads to - Answer an invagination of the cell wall until the separate daughter cells are pinched off Chromosome replication in daughter cells begins before they are separated for what reason? - Answer This allows division of each daughter cell to occu...

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14 pages

Written in 2026/2027

Grade A+

TestSolver9

What type of chromosomes do bacteria contain? - Answer Circular What direction do circular chromosomes replicate in? - Answer Bi-directional! What is the oriC? - Answer The origin, where DNA replication begins. This site is AT-rich and thus is separated easier than G-C regions. What happens once the DNA strands are separated? - Answer The replication forks will proceed in opposite directions. This is driven by the replisome, before the two forks meet at the termination site....

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11 pages

Written in 2026/2027

Grade A+

TestSolver9

How do bacterial populations divide? - Answer Binary fission. 1. Chromosome replication 2. Continued growth 3. Division into two daughter cells. What is one of the proposed ways PG layers grow? - Answer Osmotic pressure exerted by the cytosol on the PG. What are some of the ways bacteria become old? - Answer 1. Inherit damaged DNA, damaged proteins, or old cell material at the "old pole" 2. Activation of defense systems (M) rather than growth systems (G) What is meta...

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16 pages

Written in 2026/2027

Grade A+

TestSolver9

what is a virion? - Answer genetic material surrounded by protein capsid what is the difference between enveloped viruses and nonenveloped viruses? - Answer enveloped: surrounded by lipid bilayer, lipids and carbohydrates and proteins non-enveloped: simplest virion, capsid made of protein what are the 5 steps to the bacteriophage assembly line? - Answer 1. infection 2. replication of viral genetic information 3. production of viral proteins 4. assembly of viruses 5....

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13 pages

Written in 2026/2027

Grade A+

TestSolver9

3 Domains - Answer 1)Archaea 2)Bacteria 3)Eukaryota Endosymbiont Theory Definition - Answer Eukaryotes evolved from prokaryotes based on similarities found between bacteria and mitochondria Microbe Definition - Answer microscopic living organism that may be single celled (prokaryotic) or multicellular (eukaryotic) _____________ is abundant in the atmosphere but only a few species of microbes can use it in this form - Answer Nitrogen The total biomass on Earth of bacteri...

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12 pages

Written in 2026/2027

Grade A+

TestSolver9

3 Domains of life - Answer Bacteria, Archaea, Eukarya Endosymbiont theory - Answer - eukaryotes evolved more complex structures and metabolic processes by building upon prokaryotic attributes - evolutionary connection between prokaryotes and eukaryotes - similarities between bacteria and mitochondria - mitochondria and chloroplasts evolved from free-living bact via symbiosis w/in a eukaryotic host cell to have 2 key differences: these organelles contain their own DNA and a distinc...

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45 pages

Written in 2026/2027

Grade A+

TestSolver9

How do bacterial cells divide? - Answer binary fission - replication of chromosome, cellular growth, daughter cells are pinched off replication begins before d-cells are pinched off How do bacterial cells age? - Answer senescence... -inherit old cell material from "old" pole (side of cell wall inherited from parent cell) -inherit damaged DNA -inherit damaged proteins -activation of damage defense systems instead of growth systems Distinguish between the growth behaviors in...

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17 pages

Written in 2026/2027

Grade A+

TestSolver9

Replisome Speed - Answer eukaryotic slower - must displace nucleosomes, cell-dependent regulation of replication multiple initiation sites to compensate Bacterial Replication Forks - Answer 1. Helicase unwinds DNA, lagging strand coated with single stranded binding proteins, RNA primer synthesized by primase 2. DNA Pol III holoenzyme tethered to DNA by beta clamp, loaded by t-clamp loader 3. 1 Pol III core leading strand synthesis (continuous) 4. 2 Pol III cores lagging stra...

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24 pages

Written in 2026/2027

Grade A+

TestSolver9

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