30 Questions
Which of the following molecules are synthesized by N.deltocephalinicola for insects?
Essential amino acids
Which color in the provided text represents Insect DNA?
Blue
What is the extreme halophile Archaeon mentioned in the text?
Haloquadratum walsbyi
What is the primary component of Gram-Positive cell walls?
Peptidoglycan
Which process does Facilitated Diffusion not require?
Energy
What is the siderophore involved in iron acquisition in Pseudomonas aeruginosa?
Pyoverdine
Why is the surface to volume ratio (S/V) important in limiting cell size?
To ensure proper nutrient uptake by allowing nutrients to diffuse into the cell efficiently
How does the lack of a cell wall benefit Ultramicrobacteria?
It allows them to resist certain antibiotics like penicillin
Why is Nanoarchaeum equitans not considered 'free living'?
Because it has a symbiotic relationship with another organism for survival
What role does Nasuia deltocephalinicola play in its host's life cycle?
It synthesizes essential nutrients for the host
What advantage does the small size of Mycoplasma genitalium provide in adaptation to nutrient-poor conditions?
Enhanced surface-area-to-volume ratio for efficient nutrient uptake
Which bacterial cytoskeletal molecule is responsible for maintaining cell shape in many rod-shaped bacteria?
MreB
Why are drug-resistant strains of Ultramicrobacteria becoming a significant concern?
Because they lack a cell wall, making them unaffected by many antibiotics
What is the function of gas vacuoles found in aquatic, photosynthetic bacteria and archaea?
Provide buoyancy
Which of the following is NOT a function of inclusion bodies in bacteria?
Energy production
Which bacterial structure is responsible for orienting bacteria in Earth's magnetic field for aerotaxis?
Magnetosomes
What is the main role of polyphosphate in bacterial cells?
Energy storage
What is the primary function of capsules, slime layers, and S layers in bacteria?
Protection from environmental stress
What is the main function of nucleoid proteins in bacteria and archaea?
Aid in DNA supercoiling
How do plasmids differ from the chromosome in bacteria and archaea?
They replicate independently of the chromosome
Which type of plasmids is capable of transferring genetic material between bacteria in direct contact?
Fertility-F-plasmids
What distinguishes Col-plasmids from other types of plasmids?
Code for proteins that kill other bacteria
In what way are nucleoid proteins different from histones?
Bacteria lack histones
How do plasmids contribute to bacterial survival?
By conferring selective advantages such as drug resistance
What is the main function of pili and fimbriae?
Mediate attachment to surfaces
How do sex pili differ from fimbriae?
Sex pili are required for bacterial mating
What is the function of flagella in bacteria?
Facilitate bacterial movement
What produces the torque needed for flagellar movement in bacteria?
Protons moving through channels
How do flagella compare in efficiency to man-made devices?
More efficient
What is the role of the stator in flagellar movement?
Interacting with C ring and MS ring
Explore the characteristics of the nucleoid in bacteria and archaea, as well as the features of plasmids, small circular DNA structures that replicate independently of the chromosome. Learn about the role of nucleoid proteins in DNA supercoiling and folding.
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