Lec2 Flashcards
DNA is enclosed in a nuclear membrane ( T/ F )?
F, not enclosed
Bacteria are:
◇ procaryotic
◇ Lack membrane bound organelles
◇ rigid cell wall
◇ Ribosomes are scattered in the cytoplas
◇ binary fission
Pair of cells divide in one plane
Diplococci
Chain of cells formed by dividing in one plane several times
Streptococci
Divide in two planes
Tetrad
Divide in three planes
Sarcinae
Divide in many planes and remain together as a cluster
Staphylococci
Diplococci example
Neisseria for Example N. Meningitidis .
Bacilli that remain in pairs after they
divide.
Diplobacilli
Bacilli that remain in chains after they divide
Streptobacilli
short Bacilli that nearly looks like a cocci.
Coccobacilli
comma shaped
Vibrio
curved rod-shaped
Helicobacterium
helical rigid
(spirillum)
do not aggregate together and are always found singular.
Spirilla (H.elicobacter pylori)
Antibiotics producers.
Ex. Streptomyces
Actinomycetes
Myxobacteria:
Gram-negative
unicellular
rod-shaped
Star-shaped bacteria example
Ex.Stella
Advantages of bacteria to being small
◼ They have a higher surface-to-volume ratio
◼ Support greater nutrient exchange per unit cell volume,
◼ Tend to grow faster than larger cells.
Uniport: function as co-transporters. T/F?
F , transport in one direction across the membrane
Activity of lac permease is ?
energy-driven by proton motive force
are firmly embedded in the membrane and are called
integral membrane proteins.
not membrane embedded but nevertheless remain associated with membrane surfaces.
are called ?
peripheral membrane proteins
Bacteria have branched phytanyl sidechains instead of linear (T/F)?
F, in Archeae
Who is have ether bond instead of an ester bond connects the lipid to the glycerol?
Archeae
