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Molecules to Cells > Lecture 11 > Flashcards

Lecture 11 Flashcards

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Organic Chemistry 101 flashcards
1
Q

Motor proteins use energy from ______ to move along tracks in eukaryotic cells

A

ATP hydrolysis

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2
Q

Myosins move along what?

A

Actin filaments

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3
Q

Microtubule plus ends are at the cell ________

A

periphery

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4
Q

microtubule minus ends are at the cell ____

A

Centre, at the centrosome

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5
Q

What moves towards the MT plus ends?

A

Kinesin

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6
Q

What moves towards the MT minus ends?

A

Dynein

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7
Q

What are the 2 types of dynein?

A

Cytoplasmic dynein
Axonemal dynein

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8
Q

WHat kinds of axonemal dyneins are there?

A

Cilliary and flagellar

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9
Q

Cytoplasmic dynein works with a partner complex, ______

A

dynactin

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10
Q

What is transported by microtubule motors?

A

membranous organells

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11
Q

in axonal transport, the cytoplasmic dynein transports backwards to _____

A

the cell body

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12
Q

in axonal transport, kinesin outwards forwards to _____

A

the axon terminal

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13
Q

Vesicles take ____ to move down an axon 1 meter long

A

2 days

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14
Q

How are viruses transported from the plasma membrane to the nucleus?

A

By cytoplasmic dynein, either within endosomes, or as viral capsids

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15
Q

Where does anti-parallel sliding occur?

A

in mitotic and meiotic spindles

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16
Q

Where does parallel sliding occur?

A

in cilia and flagella

17
Q

What are examples of cells with flagella?

A

vertebrate sperm
some protozoa

18
Q

Ciliated cells

A

some protozoa
some epithelia

19
Q

Ciliated cells have an extra set of _____ in the cilia, which are nucleated by the ______

A

microtubules
basal body

20
Q

Rigor mortis is caused by a lack of ATP which causes…

A

tight binding of myosin II heads to actin

21
Q

Which stage of the myosin II cross-bridge cycle explains rigor morits?

A

Stage 1

22
Q

Myosin II walking along the actin is what?

A

Muscle contraction

Molecules to Cells (16 decks)

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