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Cell Biology > Lecture 9 > Flashcards

Lecture 9 Flashcards

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1
Q

What is localized next to the nucleus in animal cells?

A

Centrosome

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2
Q

What are centriols?

A
  • made of short microtubules
  • exact function is not clear
  • not found in all eukaryotes
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3
Q

What are the two microtubule motors?

A

Kinesin and Dynein

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4
Q

What motor moves cargo towards the plus end?

A

Kinesis

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5
Q

What motor moves the cargo to the minus end?

A

Dyenin

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6
Q

What is the role of microtubules?

A

Distribute and localize organelles

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7
Q

Kidneys cells detecting liquid flow is an example of what?

A

Primary cilia

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8
Q

Primary cilia are involved in what?

A

Mechanosensory and signaling

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9
Q

What is the name of bundles of microtubules organized by basal bodies (centriols) that thanks to dynein motors are mobile?

A

Motile cilia

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10
Q

What causes bending in the microtubules?

A

dynein motors move microtubules against eachother

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11
Q

What involves the cooperation of kinesis and myosin at the cell cortex?

A

The transport of secretory vesicles to the plasma membrane

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12
Q

Where are intermediate filaments found

A

Found in animal cells
Not plant or fungi

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13
Q

What is the main role of intermediate filaments?

A

Structural role

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14
Q

What is the role of nuclear lamina?

A

forms strong network underneath the nuclear membrane that stabilizes the nucleus

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15
Q

What bonds are formed in DNA to bind the nucleotides?

A

hydrogen bonds

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16
Q

What is gene expression?

A

how the information stored in DNA is used to produce proteins

17
Q

What is the form of DNA found in Eukaryotes?

A

chromosomes

18
Q

What is the sum of the nuclear DNA called?

A

genome

19
Q

Does size of the genome correlate with the # of chromosome?

A

no

20
Q

At what stage of the cell cycle are chromosomes less compact?

A

Interphase

21
Q

When are the chromosomes highly compacted?

A

During mitosis

22
Q

What is the main structure of the nucleus like?

A
  • Outer nuclear membrane is continuous with ER
    membrane
  • Nuclear Lamina: protein meshwork that provides
    structural support
  • Nuclear pore: large macromolecular structure with 8-fold
    symmetry creates pore
23
Q

What creates structural support of the nucleus?

A

Nuclear lamina

24
Q

Main function of a nuclear pore?

A

Gateway between cytoplasm and nucleoplasm

25
Q

When does nuclear pore dilate?

A

For transport of larger particles

26
Q

What are the connection sites and diffusion barriers between the outer and inner membrane?

A

nuclear pore

Cell Biology (18 decks)

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