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UNR BIO 251|-EXAM 1|QUESTIONS AND 100% CORRECT WELL DETAILED ANSWERS|LATEST UPDATE!!!2025/2026|GUARANTEED PASS|GRADED A+

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UNR BIO 251|-EXAM 1|QUESTIONS AND 100% CORRECT WELL DETAILED ANSWERS|LATEST UPDATE!!!2025/2026|GUARANTEED PASS|GRADED A+

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CORRECT WELL DETAILED ANSWERS|LATEST
UPDATE!!!!2025/2026|GUARANTEED
PASS|GRADED A+
Eukaryotes - ANSWER DNA contained in the nucleus

Fungi, Protozoa(Protista), Algae(Animalia), Plantae



Define Microbe - ANSWER A microscopic organism

Prokaryotes, Eukaryotes, Viruses



Prokaryotes - ANSWER Cells that do not have a nucleus and Generally lack membrane-
bound organelles

Bacteria and Archaea



Viruses - ANSWER Acellular; composed of nucleic acid and protein

-Obligate intracellular parasites

-Not composed of cells



Bacteria(singular-bacterium) - ANSWER Prokaryote

unicelular prokaryotes with peptidoglycan in cell wall



Archaea - ANSWER Prokaryote

unicellular prokaryotes, in extreme environments With OUT peptidoglycan in cell wall



Fungi - ANSWER Eukaryote

-Unicellular or multicellular eukaryotes; absorb organic material from the environment

-Yeasts, molds, and macroscopic species


1

,-Develop spores



Protozoa - ANSWER Eukaryote

-Unicellular eukaryotes; may be phototrophic or chemotrophic

-Very diverse



Algae - ANSWER Eukaryote

unicellular or multicellular eukaryotes; photosynthetic (not plants)



Beneficial roles of microbes - ANSWER Recycling vital elements

Sewage treatment

Bioremediation

Insect control

Biotechnology

Food production

Microbiome



Recycling vital elements's Role - ANSWER Beneficial

-Carbon, nitrogen, oxygen, sulfur, phosphorus

-Microbes form the base for the food chain in many aquatic environments

-Microbial ecology - how microorganisms interact with the environment



Sewage treatment's Role - ANSWER Beneficial

-Microbes break down organic materials



Bioremediation's - ANSWER Beneficial

Clean-up after oil or chemical spill


2

, Insect control's Role - ANSWER Beneficial

Bacteria produce toxins that are harmful to insects



Biotechnology - ANSWER Beneficial

-Molecular biology

-Recombinant DNA



Food production - ANSWER Beneficial

Yeast - bread, beer, wine, chocolate

Lactic acid bacteria - yogurt, sauerkraut, soy sauce, cheese, pickles, chocolate, coffee,
sourdough bread



Microbiome (normal microbiota) - ANSWER Beneficial

-Microbes that live in and on your body

-Normally harmless, but sometimes helpful Aid digestion Fight pathogens Produce vitamins



Harmful roles of microbes - ANSWER Infectious diseases

- Pathogen

-Emerging infectious diseases

Biofilms



Pathogen - ANSWER Harmful

disease producing organism

-Invade a host

-Carry out at least part of their life cycle in the host




3

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