Flashcards in Bacteriology overview and basic concepts Deck (71)
Gram positive: Aerobic cocci (3)
Gram positive: Aerobic rods (6)
Gram positive: Anaerobic rods (1)
Gram negative: Enterobacteriaceae (rod) (5)
Gram negative: Non-fermentative rods (7)
Gram negative: Anaerobic rods (2)
Curved spiral bacteria (5)
Obligate intracellular bacteria (4)
Bacteria without a cell wall (1)?
4 things in common for prokaryotes and eukaryotes?
1. Cell membrane
4. Ribosomes (although different ribosome types)
No nucleus no membrane enclosed organelles. They tend to be smaller and more simplistic
have a nucleus and membrane enclosed organelle. They tend to be larger and more complex
What holds bacteria DNA if bacteria do not contain a true nucleus?
A jelly like aqueous solution that contains macromolecules, small molecules, and various inorganic ions?
What are proteins (enzymes) such as mRNA, and tRNA considered?
precursors to macromolecules, metabolites or vitamins, energy sources
required for enzymatic activity (co factors)
What does the cytoplasm contain?
Nucleoid and ribosomes
Helps to facilitate chemical reactions and it helps to dissolve solutes (carbohydrates and proteins)
Nucleus like structure that is made up of 60% DNA, contains proteins and RNA
a complete set of DNA in bacteria which includes all essential genes
In the nucleoid the DNA is compacted by?
DNA loop formation in the nucleoid is caused by?
Nucleoid-associated proteins bound to DNA
DNA supercoiling is mediated by these 2 enzymes?
DNA gyrase and topoisomerase I
Along with proteins involved in DNA compaction, ________ _________ regulate expression of the bacterial genome?
2 types of RNA in the nucleoid?
-mRNA (messenger RNA) encodes for proteins
-ncRNA (non coding RNA) is involved in DNA organization and expression of the bacterial genome
one pair of nucleotide bases that connect the complementary strands of DNA
1 base pair
A circular molecule of DNA that replicates separately from the chromosome (not part of the nucleoid)
Plasmid genes are not ______ under normal conditions?