NATS 1670 - TEST #1 EXAM 2025 QUESTIONS AND ANSWERS

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NATS 1670 - TEST #1 EXAM 2025 QUESTIONS AND ANSWERS

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2025/2026

Institution NATS 1670

Course NATS 1670

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1 @COPYRIGHT THEBRIGHT 2025/2026 What do all cells have in common? - ANS DNA, RNA, Proteins & Enzymes, Cell Membrane, ATP (energy) What do eukaryotes have that prokaryotes don't? - ANS nucleus, organelles, RNA processing what bacteria grows best below 20 degrees? - ANS psychrophiles what bacteria grows best between 20-50 degrees? - ANS mesophiles what bacteria grows best over 50 degrees? - ANS thermophiles and hyperthermophiles what is an example of an acidophile? - ANS helicobacter pylori: causes peptic ulcers, and if left untreated, gastric cancer what are spores and what can they do? - ANS reproductive cell formed by bacteria that can grow with the absence of water what are halophiles? - ANS archaea that can grow in high levels of salt do all bacteria require oxygen to live? - ANS no, anaerobic bacteria do not need oxygen to survive NATS 1670 - TEST #1 EXAM 2025 QUESTIONS AND ANSWERS 2 @COPYRIGHT THEBRIGHT 2025/2026 what can cyanobacteria do? - ANS cyanobacteria can grow in the absence of nutrients: gain their energy through photosynthesis what life form occupied earth first? - ANS prokaryotes what are some types of archaea and where do they live? - ANS thermoacidophiles (hot springs), methanogens (digestive system), halophiles (sea). what is yeast? - ANS eukaryotic unicellular organism where can yeast be found? - ANS baking (aerobic), alcohol (anaerobic), yeast infections what are molds and where are they used? - ANS filamentous fungi with mycelial structure, used in creation of antibiotics and citric acid what is mycelium? - ANS highly branched system of tubes containing mobile cytoplasm and nuclei what are protozoa? - ANS unicellular eukaryotic organisms that lack a cell wall what are some beneficial roles of protozoa? - ANS digestion and removing bacteria from wastewater what are viruses? - ANS complexes of nucleic acids and proteins, parasites of cellular life what do viruses cont

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NATS 1670 - TEST #1 EXAM 2025
QUESTIONS AND ANSWERS

What do all cells have in common? - ANS DNA, RNA, Proteins & Enzymes, Cell Membrane,
ATP (energy)

What do eukaryotes have that prokaryotes don't? - ANS nucleus, organelles, RNA processing

what bacteria grows best below 20 degrees? - ANS psychrophiles

what bacteria grows best between 20-50 degrees? - ANS mesophiles

what bacteria grows best over 50 degrees? - ANS thermophiles and hyperthermophiles

what is an example of an acidophile? - ANS helicobacter pylori: causes peptic ulcers, and if
left untreated, gastric cancer

what are spores and what can they do? - ANS reproductive cell formed by bacteria that can
grow with the absence of water

what are halophiles? - ANS archaea that can grow in high levels of salt

do all bacteria require oxygen to live? - ANS no, anaerobic bacteria do not need oxygen to
survive

1 @COPYRIGHT THEBRIGHT 2025/2026

, what can cyanobacteria do? - ANS cyanobacteria can grow in the absence of nutrients: gain
their energy through photosynthesis

what life form occupied earth first? - ANS prokaryotes

what are some types of archaea and where do they live? - ANS thermoacidophiles (hot
springs), methanogens (digestive system), halophiles (sea).

what is yeast? - ANS eukaryotic unicellular organism

where can yeast be found? - ANS baking (aerobic), alcohol (anaerobic), yeast infections

what are molds and where are they used? - ANS filamentous fungi with mycelial structure,
used in creation of antibiotics and citric acid

what is mycelium? - ANS highly branched system of tubes containing mobile cytoplasm and
nuclei

what are protozoa? - ANS unicellular eukaryotic organisms that lack a cell wall

what are some beneficial roles of protozoa? - ANS digestion and removing bacteria from
wastewater

what are viruses? - ANS complexes of nucleic acids and proteins, parasites of cellular life

what do viruses contain? - ANS DNA/RNA, Protein coat for protection, and lipid envelope

2 @COPYRIGHT THEBRIGHT 2025/2026

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Uploaded on: August 9, 2025
Number of pages: 11
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Type: Exam (elaborations)
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