What is meant by the term "staphylococcus"? O Bacteria that are round and arranged in clusters Bacteria that are round and arranged in chains Special bacteria that are spiral-shaped Bacteria that are rod-shaped and found in groups Which of the following is false regarding a DNA molecule? O It contains a double helix structure It stores genetic information OIt contains the nitrogen base Uracil OIt contains base pairs

What is meant by the term "staphylococcus"? O Bacteria that are round and arranged in clusters Bacteria that are round and arranged in chains Special bacteria that are spiral-shaped Bacteria that are rod-shaped and found in groups Which of the following is false regarding a DNA molecule? O It contains a double helix structure It stores genetic information OIt contains the nitrogen base Uracil OIt contains base pairs

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter13: Diversity Of Microbes, Fungi, And Protists

Section: Chapter Questions

Problem 1ACQ: Figure 13.6 Which of the following statements is true? a. Gram-positive bacteria have a single cell...

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Figure 13.6 Which of the following statements is true? a. Gram-positive bacteria have a single cell wall formed from peptidoglycan. b. Gram-positive bacteria have an outer membrane. c. The cell wall of Gram-negative bacteria is thick, and the cell wall of Gram-positive bacteria is thin. d. Gram-negative bacteria have a cell wall made of peptidoglycan, while Gram-positive bacteria have a cell wall made of phospholipids.
You are a doctor at a field hospital deep in the Amazon jungle. A local villager comes to you sick with nausea, diarrhea and vomiting and you suspect they may have food poisoning. Several different types of bacteria can cause food poisoning including Campylobacter jejuni, Staphylococcus aureus, and Salmonella tyhphirium. How will using a microscope help you to identify which of the three bacteria are responsible for making your patient sick so that you can administer the correct antibiotic?
Which of the following statements is true? Select one: O a. Gram-positive bacterial walls have a relatively thin layer of peptidoglycan anchored to the acids O b. Peptidoglycan is a fatty acid O c. The cell walls of bacteria are composed of peptidoglycan O d. Peptidoglycan is found mainly in the cell walls of fungi, algae and plants
I dont understand this practice Biology Question. In order to categorize bacteria, scientists use various characteristics to classify them into groups. Without naming these groups, explain characteristics and tests used by microbiologists to assign bacteria to different taxonomic groups.
What is meant by the term "streptobacillus"? a-bacteria that are rods and arranged in grapelike clusters b-bacteria that are round and arranged in chains c-special bacteria that are spiral-shaped d-bacteria that are rods and in chains
Gram-positive (+) and gram-negative (-) bacteria are characterized by differences in a. the cell wall: gram+ have peptidoglycan, gram– have pseudopeptidoglycan. b. the plasma membrane: gram+ have ester-linked lipids, gram–have ether-linked lipids. c. the cell wall: gram+ have a thick layer of peptidoglycan and gram– have an outer membrane. d. chromosomal structure: gram+ have circular chromosomes, gram– have linear chromosomes.
The unicellular, rod-shaped bacterium E. coli is~2 μm long and 0.8 μm wide, and has a genomeconsisting of a single 4.6 Mb circular DNA molecule. The unicellular archaean Methanosarcinaacetivorans is spherical (coccus-shaped) with adiameter of 3 μm and has a 5.7 Mb circular genome.The unicellular eukaryote Saccharomyces cerevisiaeis roughly spherical, with a diameter of 5–10 μm.It has a haploid genome of 12 Mb divided among16 linear chromosomes. Given these descriptions,how could you determine whether a new, uncharacterized microorganism was a bacterium, an archaean,or a eukaryote?
A scientist isolates a new species of prokaryote. He notes that the specimen is a bacillus with a lipid bilayer and cell wall that stains positive for peptidoglycan. Its circular chromosome replicates from a single origin of replication. Is the specimen most likely an Archaea, a Gram-positive bacterium, or a Gram-negative bacterium? How do you know?
You a clinical lab worker. Your boss hands you a sample and asks you to identify the genus of bacteria in the sample. Using a microscope, you see long chains spherical bacteria, indicative of repeated divisions along one plane. To what genus do you think bacterial sample belongs? (Choose all that apply.) Group of answer choices Lactobacillus Lactococcus Staphylococcus Streptococcus Caulobacter
A researcher discovers a new species of bacteria in the Sahara Desert. The researcher is concerned the bacteria may be pathogenic (i.e., cause disease). What structural characteristic of the bacteria would help the researcher determine if the bacteria are pathogenic? Group of answer choices Presence of a cell wall Presence of a capsule Presence of a pilus Presence of a flagella
Frederick Griffith documented bacterial transformation. Which statement is true concerning his experiments? DNA that was not contained within a live cell caused the death of the host organism. DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics. The two strains of Streptococcus were visually indistinguishable. Heat treatment of the Streptococcus strains destroyed the DNA molecules.
What do you mean by domain bacteria? Explain it briefly.