BIOLOGY BACTERIA SUMMARY
COMPREHENSIVE TEST BANK 2026
VERIFIED QUESTIONS AND ANSWERS
●● What type of organisms does Domain Eukarya contain? Answer:
Eukaryotic organisms, including Animalia, Plantae, Fungi, and Protista.
●● What are prokaryotic organisms? Answer: Organisms whose cells do
not have a nucleus, including Archaea and Bacteria.
●● Where do Archaea bacteria typically live? Answer: In extreme
environments like boiling sulfur springs and deep-sea thermal vents.
●● What are autotrophs? Answer: Organisms that make their own food
and serve as producers in food chains.
●● How are bacteria commonly classified? Answer: By their shape and
their reaction to Gram Staining.
●● What is the difference between heterotrophs and autotrophs?
Answer: Heterotrophs cannot make their own food, while autotrophs
can.
, ●● What are cyanobacteria? Answer: Photosynthetic autotrophs that
contain chlorophyll.
●● What role do nitrogen-fixing bacteria play? Answer: They provide
essential nitrogen to plants for growth.
●● What are probiotics? Answer: Bacteria that live in the intestines and
support human health.
●● How are viruses classified? Answer: By the type of nucleic acid
(RNA or DNA), strand type (single or double), and presence of an
envelope.
●● What is a virion? Answer: A viral particle consisting of nucleic acid
surrounded by a protein coat.
●● What is the function of the capsid in a virus? Answer: It protects the
viral genome and aids in targeting host cells.
●● What are spike projections in viruses? Answer: Viral proteins
involved in receptor recognition and viral tropism.
●● What is the first virus discovered to infect humans? Answer: The
virus causing yellow fever in 1901.
COMPREHENSIVE TEST BANK 2026
VERIFIED QUESTIONS AND ANSWERS
●● What type of organisms does Domain Eukarya contain? Answer:
Eukaryotic organisms, including Animalia, Plantae, Fungi, and Protista.
●● What are prokaryotic organisms? Answer: Organisms whose cells do
not have a nucleus, including Archaea and Bacteria.
●● Where do Archaea bacteria typically live? Answer: In extreme
environments like boiling sulfur springs and deep-sea thermal vents.
●● What are autotrophs? Answer: Organisms that make their own food
and serve as producers in food chains.
●● How are bacteria commonly classified? Answer: By their shape and
their reaction to Gram Staining.
●● What is the difference between heterotrophs and autotrophs?
Answer: Heterotrophs cannot make their own food, while autotrophs
can.
, ●● What are cyanobacteria? Answer: Photosynthetic autotrophs that
contain chlorophyll.
●● What role do nitrogen-fixing bacteria play? Answer: They provide
essential nitrogen to plants for growth.
●● What are probiotics? Answer: Bacteria that live in the intestines and
support human health.
●● How are viruses classified? Answer: By the type of nucleic acid
(RNA or DNA), strand type (single or double), and presence of an
envelope.
●● What is a virion? Answer: A viral particle consisting of nucleic acid
surrounded by a protein coat.
●● What is the function of the capsid in a virus? Answer: It protects the
viral genome and aids in targeting host cells.
●● What are spike projections in viruses? Answer: Viral proteins
involved in receptor recognition and viral tropism.
●● What is the first virus discovered to infect humans? Answer: The
virus causing yellow fever in 1901.
