Bacteria & Archea

Peptidoglycan is

• found in the chromosomes of most bacteria.

• composed of long polysaccharides crosslinked with short polypeptides.

• composed of long polypeptides held together by disulfide bridges.

• a unique combination of protein lipid and fat.

Bacteria can obtain their nutrition by

• photosynthesis.

• chemosynthesis.

• heterotrophy.

• all of the above

Which of the following makes archaebacteria different from other monerans?

• absence of peptidoglycan

• two chromosomes

• existence of organelles

• aerobic

The methane-producing bacteria belong to

• archaebacteria

• prokaryotes

• eukaryotes

• urkaryotes

Listed below are descriptions of bacterial shape. Select the exception.

• coccus

• bacillus

• pili

• spiral

Which of the following allow the bacteria to join together to transfer genes?

• flagella

• pores

• connecting channels

• pili

Which of the following statements about prokaryotes is correct?

• Bacterial cells conjugate to mutually exchange genetic material

• Their genetic material is confined within a nuclear envelope

• They divide by binary fission, without mitosis or meiosis

• The persistence of bacteria throughout evolutionary time is due to genetic similarity

What is the function of a bacterium's capsule?

• Adhesion

• Protection

• DNA containment

• Protein synthesis

Which of the following statements is not true?

• Archaea and bacteria have different membrane lipids.

• Both archaea and bacteria generally lack membrane-enclosed organelles

• The cell walls of archaea lack peptidoglycan

• Only bacteria have histones associated with DNA.

Plant-like photosynthesis that releases O₂ occurs in

• cyanobacteria

• chlamydias

• archaea

• actinomycetes

Tags

NGSS.HS-LS2-5