MBI 111 Miami University Exam 2 (Miami University) || Already Passed.
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Course
MBI 111 Miami University
Institution
MBI 111 Miami University
Eukaryote correct answers Have a nucleus that is compartmentalized.
Includes plants, animals, fungi, and protists.
Prokaryote correct answers No membrane to hold things together. DNA is free floating.
Includes bacteria, rickettsiae, and cyanobacteria
Common Characteristics between prokaryot...
MBI 111 Miami University Exam 2 (Miami University) ||
Already Passed.
Eukaryote correct answers Have a nucleus that is compartmentalized.
Includes plants, animals, fungi, and protists.
Prokaryote correct answers No membrane to hold things together. DNA is free floating.
Includes bacteria, rickettsiae, and cyanobacteria
Common Characteristics between prokaryotes and Eukaryotes correct answers Cell Membrane,
ribosomes, flagella, cell walls, cytoplasm, and cytoskeletons
Spores correct answers Dormant version of fungi. Fungi make spores when unfavorable
conditions arise.
Flagella correct answers Tail like ways of locomotion. Whipping motion
Pili correct answers Used for attachment and colonization. Mainly to combine with other cells
and exchange genetic material. NOT LOCOMOTION
Capsule correct answers Layer of small proteins and sugars. Used for protection, prevents
against dehydration, invasion, and keeps nutrients inside the cell.
Cell Wall correct answers Used to hold the cell together. Prevent the cell from bursting. Can
either be Gram positive or Gram Negative
Gram Positive Cells correct answers Typically larger (About 25nm)
Gram Negative Cells correct answers Typically smaller (About 3nm)
How do bacterial cells reproduce? correct answers Binary fission.
Asexually.
Cell population doubles every generation.
Growth is limited due to resources.
Lag Phase of bacterial reproduction correct answers No change in cell number, but intense
metabolic activity is going on
Log Phase of bacterial reproduction correct answers Exponential growth
Stationary Phase of bacterial reproduction correct answers Reproduction and death rates reach
equilibrium
Death Phase of bacterial reproduction correct answers Death rates exceed reproduction rates
, Psychrophiles (Temp) correct answers Live in -5 to 20 degrees celsius
Mesophiles (Temp) correct answers 12 to 45 degrees celsius.
Normal microbiota, pathogens, and spoilage bacteria
Thermophiles (Temp) correct answers 42 to 68 degrees celsius
Hyperthermophiles (Temp) correct answers 65 to >100 degrees celsius
Anaerobic Microbes correct answers Require and oxygen free environment
Facultative Microbes correct answers Grow with or without oxygen
Microaerophilic Microbes correct answers prefer little oxygen
Bacterial Growth Media correct answers Nutrient Broth
Nutrient Agar correct answers Nutrient Broth + agar
Enriched Media correct answers 1. Blood agar - nutrient agar plus blood
2. Chocolate Agar - Heated blood agar that releases hemoglobin.
Selective Media correct answers Contains ingredients which inhibit some microbes grown while
promoting others
Differential Media correct answers Has ingredients which allow differentiation of various
colonies
Three bacteria shapes correct answers Rods, spheres, and spirals
Virus Replication Process correct answers 1. Attachment - Specific binding of virus to receptors
on cell
2. Penetration - Enveloped virus fuses to cell membrane, non-enveloped virus may be
phagocytosed.
3. Uncoating - Enzymes strip away capsid and viruses are released in cell
4. Synthesis - Replication under the control of viral genes
5. Maturation/Assembly - Viral spike proteins are inserted into cell. Nucleocapsid is formed
from DNA/RNA
6. Release - Virus exits cell by lysis or budding
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