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Bio 280 exam 2 questions and answershttps://www.stuvia.com/user/filwe1099salmhttps://www
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Bio 280 Exam 2 Questions
and Answers
How many chromosomes are found in prokaryotes?
Answer> one
What is another place that can have DNA in prokaryotes?
Answer> plasmid
Bacteria generally have a?
Answer> single large chromosome
Super Coiled DNA is
Answer> DNA packed and coiled which is held together by proteins. It is not
bounded by a membrane.
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Plasmids
Answer> -Extrachromosomal circular DNA
-Contain genes which are not necessary for the organism's survival but which
may be useful to it (e.g antibiotic resistance genes, genes for enzymes which
degrade pollutants for consumption by the cell, etc.).
-Can be transferred 'horizontally' (from mature cell to mature cell)
- Used as vectors for transferring DNA in genetic engineering
Ribosomes
Answer> - Used for constructing proteins from messenger RNA (mRNA) (more
on this later)
- In two parts and made up of proteins and ribosomal RNA (rRNA)
Poly beta-hydroxybutyrate (PHB) granules
Answer> a chemical some bacteria produce to store carbon and energy, much
like we do with fats. Its significance to humans is that it is essentially
biodegradable plastic.
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Storage bodies and inclusions are?
Answer> PHB, glycogen, sulfur, magnetosomes
Endospores
Answer> -Formed for survival, not reproduction
- Toughest, most resistant life form of all, partially due to the presence of
dipicolinic acid in the spore coat.Can come back to life, only way to kill them is
autoclaving.
- Formed within cell (endo = inside) unlike fungal spores
- Two major genera have them: Bacillus and Clostridium.
- Have been found as far back as 40 million years ago.
Raul Cano
Answer> extracted endospores out of wasp and it grew
Clostridium tetani and C. perfringens is
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Answer> obligated anaerobic
C. Botulinum is
Answer> found in canned food, causal agent of botulism
Bacillus anthracis
Answer> causal agent of anthrax
Clostridium tetani
Answer> causal agent of tetanus
C. perfringens
Answer> causal agent of gas gangrene
Bacterial Motility
Answer> bacteria have either polar or peritrichous flagella, they run and tumble
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Bio 280 exam 2 questions and answershttps://www.stuvia.com/user/filwe1099salmhttps://www
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Bio 280 Exam 2 Questions
and Answers
How many chromosomes are found in prokaryotes?
Answer> one
What is another place that can have DNA in prokaryotes?
Answer> plasmid
Bacteria generally have a?
Answer> single large chromosome
Super Coiled DNA is
Answer> DNA packed and coiled which is held together by proteins. It is not
bounded by a membrane.
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Plasmids
Answer> -Extrachromosomal circular DNA
-Contain genes which are not necessary for the organism's survival but which
may be useful to it (e.g antibiotic resistance genes, genes for enzymes which
degrade pollutants for consumption by the cell, etc.).
-Can be transferred 'horizontally' (from mature cell to mature cell)
- Used as vectors for transferring DNA in genetic engineering
Ribosomes
Answer> - Used for constructing proteins from messenger RNA (mRNA) (more
on this later)
- In two parts and made up of proteins and ribosomal RNA (rRNA)
Poly beta-hydroxybutyrate (PHB) granules
Answer> a chemical some bacteria produce to store carbon and energy, much
like we do with fats. Its significance to humans is that it is essentially
biodegradable plastic.
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Storage bodies and inclusions are?
Answer> PHB, glycogen, sulfur, magnetosomes
Endospores
Answer> -Formed for survival, not reproduction
- Toughest, most resistant life form of all, partially due to the presence of
dipicolinic acid in the spore coat.Can come back to life, only way to kill them is
autoclaving.
- Formed within cell (endo = inside) unlike fungal spores
- Two major genera have them: Bacillus and Clostridium.
- Have been found as far back as 40 million years ago.
Raul Cano
Answer> extracted endospores out of wasp and it grew
Clostridium tetani and C. perfringens is
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Answer> obligated anaerobic
C. Botulinum is
Answer> found in canned food, causal agent of botulism
Bacillus anthracis
Answer> causal agent of anthrax
Clostridium tetani
Answer> causal agent of tetanus
C. perfringens
Answer> causal agent of gas gangrene
Bacterial Motility
Answer> bacteria have either polar or peritrichous flagella, they run and tumble
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