Which of the following is not a typical difference between cukaryotes and prokar

Question

Which of the following is not a typical difference between cukaryotes and prokaryotes? A. Eukaryotes have ester-linked phospholipids, whereas prokaryotes have ether-linked or ester-linked phospholipids B. Eukaryotic cell walls lack peptidoglycan in their cell walls (if present), whereas many prokaryotes use peptidoglycan in their cell walls C. Eukaryotic cells have histones for DNA organization, whereas prokaryotic cells have histone-like proteins or nucleoid-associated proteins involved in DNA organization. 7. D. Eukaryotic cells typically have circular chromosomes, whereas prokaryotic cells typically have linear chromosomes 8. Which describes bacteria that require Jow concentrations of oxygen to survive (less than that in the current atmosphere)? A, facultative anacrobes B. microacrophiles C. obligate acrobes The human microbiome consists of which of the following? A. all microbes present on or in the body B. pathogenic microbes only C. resident microbes only D. transient microbes only 9. 10. Treponema pallidum, the causative agent of syphilis, is an example of which group of organisms? A. CFB group B. planctomycetes C. protcobacteria b. spirochetes 11. Protozoa are best described as being A. nonphotosynthetic multicellular microorganisms B. nonphotosynthetic unicellular microorganisms C. photosynthetic multicellular microorganisms D. photosynthetic unicellular microorganisms 12. African sleeping sickness is caused by which pathogen? A. Giardia lamblia B. Plasmodium falciparum C. Taxoplasma gondil D. Trypanosoma brucei 13. The cell walls of fungi are largely composed of which of the following? A. cellulose B. chitin C. peptidoglycan D. starch

Explanation / Answer

7. "Eukaryotic chromosomes are circular and prokaryotic is linear" is the wrong statement actually eukaryotes have linear chromosomes while prokaryotes have circular.

8. Microaerophiles are the bacteria which needs low oxygen concentration to survive. In high concentrations of oxygen, they die due to poisoning.

9. The human microbiome consists of all microbes present on or in our body.

10. Trypanosoma pallidum the causative agent of syphilis is an example of the group Spirochete(a flexible spirally twisted bacterium)

11. Protozoa are best described as being nonphotosynthetic unicellular organisms.

12. African sleeping sickness is caused by Trypanosoma brucei. It is a parasite carried by vector tsetse fly.

13. Cell walls of fungi are largely composed of chitin. Chitin is a fibrous substance consisting of polysaccharides.

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