WGU D311 Micro Section 1 Questions With Correct Answers

WGU D311 Micro Section 1 Questions
With Correct Answers
What are characteristics of Prokaryotic Cells "Bacteria" -
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7correct answer...✔✔Single celled, do not have nucleus, mitochondria or chloroplast, mult
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iple shapes (coccus, bacillus, vibrio, etc) found in pairs, clusters or chains
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What are characteristics of Eukaryotic cells "animal and plant cells" - correct answer...✔✔
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Have a nucleus, have membrane bound organelles, single celled or multicellular, larger th
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an prokaryotes, linear histone wrapped chromosomes
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Differences between Prokaryotes and Eukaryotes - correct answer...✔✔
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All plants and animal cells (protozoans , algae, fungi) are Eukaryotic.
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bacteria and archaea are Prokaryotic 7 7 7 7 7


Structures if Eukaryotic: nucleus, membrane organelles in the cytoplasm ( mitochondria, e
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ndoplasmic reticulum, Golgi apparatus, lysomes, and peroxisomes held in place by the cyt
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oskeleton. Flagella (whip like/flexible) and cilla 7 7 7 7 7 7


Structures of Prokaryotic: cell membrane, chromosomal dna that is in nucleotide, ribosom
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es, and cell wall. Flagella (stiff/rotating) pilli, fimbriae and capsules
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Bacteria - correct answer...✔✔ 7 7 7


Found in every habitat on earth, prokaryotic, cell walls have peptidoglycan and described b
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y shape (coccus, bacillus, spirillum, spirochete or vibrio)
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Protists - correct answer...✔✔ 7 7 7


A eukaryotic organism that cannot be classified as an animal, plant, or fungus.
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Fungi - correct answer...✔✔
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Eukaryotic, lives by decomposing and absorbing nutrients. Not photosynthetic and has cell
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wall made of chitin
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Helminths - correct answer...✔✔ 7 7 7


multicellular parasitic organisms commonly called worms or flukes
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ex: Guinea worm (Dracunculus medinensis)
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Viruses - correct answer...✔✔ 7 7 7


Acellular, consists of proteins and genetic material (dna/rna) never both
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Bacterial Structures "prokaryotic" - correct answer...✔✔
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Nucleoid, ribosomes, endospores, plasma membrane, cell wall, peptidoglycan, flagella, fi
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mbriae, pilli 7




AGRADESOLUTIONS

, Nucleoid of Bacteria - correct answer...✔✔
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central area in a prokaryotic cell that contains genetic information, not surrounded by a me
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mbrane

Ribosomes of Bacteria - correct answer...✔✔ 7 7 7 7 7


site of protein synthesis. 70S composed of two subunits (30S small and 50S large and are
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composed of protein and rRNA components 7 7 7 7 7




Endospores of bacteria - correct answer...✔✔ 7 7 7 7 7


form around DNA when stressed, protect until conditions are good
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Plasma membrane in bacteria - correct answer...✔✔
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phospholipid bilayer with embedded proteins that defines the boundary of the cell
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Cell wall of bacteria - correct answer...✔✔
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made of peptidoglycan and help maintain shape and withstand changes in osmotic pressu
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re

Peptidoglycan of bacteria - correct answer...✔✔is part of the cell wall. 7 7 7 7 7 7 7 7 7 7


is made of sugars and proteins.
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Flagella of bacteria - correct answer...✔✔
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acts as a propeller to move the cell. Stiff, rotating structure.
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Fimbriae of bacteria - correct answer...✔✔hairlike bristles that allow adhesion to surfaces
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Pili of bacteria - correct answer...✔✔
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Appendages that allow bacteria to attach to each other and to transfer DNA
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Chemotaxis - correct answer...✔✔ 7 7 7


Directional movt from a call in response to chemical attraction
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Phototaxis - correct answer...✔✔movement in response to light using flagella
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Bacterium "runs" - correct answer...✔✔ 7 7 7 7


Movt of bacteria counterclockwise flagellar rotation
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Bacteria "tumbles" - correct answer...✔✔
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Random movt of bacterial cell by clockwise flagellar rotation
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vegetative cell - correct answer...✔✔ 7 7 7 7


metabolically active and growing and does not contain endospores. Sensitive to extreme t
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emps and radiation, gram positive, normal water content
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AGRADESOLUTIONS