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PMI > PMI02-2001 Micro-organism, structure & function > Flashcards

PMI02-2001 Micro-organism, structure & function Flashcards

1
Q

What does TSE stand for?

A

Transmissible spongey encephalopathies

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2
Q

What are TSEs?

A

Infective proteins as they affect the structure of other proteins
These proteins come together to form plaques or sponge-like lesions in the brain

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3
Q

How are TSEs transmitted?

A

Via prions- misfolded proteins that are expressed on neurones in the body and are associated with neurodegenerative disease
It a normal prion comes into contact with a misfolded one, it causes transmission of infection

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4
Q

Are bacteria, eukaryotes and viruses visible in light microscopes?

A 
Bacteria= yes
Eukaryotes= yes
Viruses= no
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5
Q

Are bacteria, eukaryotes and viruses capable of free growth?

A 
bacteria= some are
eukaryotes= yes
viruses= no
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6
Q

Can cell division of bacteria, eukaryotes and viruses make new cells

A 
bacteria= yes
eukaryotes= yes
viruses= n/a
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7
Q

Are bacteria, eukaryotes and viruses metabolically active?

A 
bacteria= yes
eukaryotes= yes
viruses= no
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8
Q

Are genes separated from the cytoplasm by membrane in bacteria, eukaryotes and viruses?

A 
Bacteria= no
eukaryotes= yes
viruses= n/a
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9
Q

What is in genome in bacteria, eukaryotes and viruses?

A 
bacteria= DNA
eukaryotes= DNA
viruses= DNA/RNA
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10
Q

Why are viruses referred to as obligate intracellular parasites?

A

They use a host cell’s machinery to reproduce

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11
Q

What is positive RNA?

A

Can be used directly for translation by acting as mRNA

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12
Q

What is negative RNA?

A

Needs to be transcribed first

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13
Q

What is the protein coat of a virus called and what is its purpose?

A

capsid

protects the nucleic acid

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14
Q

What are naked viruses?

A

They have the protein coat with the DNA inside

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15
Q

What are enveloped viruses?

A

They are packaged in a plasma membrane from the host cell

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16
Q

How do viruses replicate?

A

Host cells release chemokines
The virus will then attach to host cell receptors via the glycoprotein receptor on the viral cell and release its nucleic acids into the host cell

PMI (16 decks)

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