Lec 39 Flashcards

1
Q

Cell cycle checkpoints

A

G1

M

G2

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2
Q

Cyclin-Cdk complex

A

Kinases phosphorylate target proteins

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3
Q

Phosphatases are present in

A

Low numbers but always present

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4
Q

Cyclin dependent kinases
Cdks

A

Always at a high level (acting during cell cycle)

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5
Q

Cyclins

A

Bind to Cdks and dictate their targets

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6
Q

G1 cyclins

A

Prep for DNA replication

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7
Q

S cyclins

A

Start DNA replications

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8
Q

M cyclins

A

Start prophase (mitosis)C

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9
Q

Cyclin makes Cdk

A

Active

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10
Q

Cyclin amount

A

Cycles from low to high

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11
Q

G1 Cdk means

A

Cdk with cyclin in G1

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12
Q

G1 Cdk has

A

2 targets

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13
Q

S Cdk has

A

2 targets

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14
Q

M cdk has

A

6 targets

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15
Q

Cyclin A binds to

A

Cdk2 and moves the T loop which exposes the active site and allows it to bind to targets

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16
Q

Anaphase promoting complex (APC)

A

Triggers anaphase

Adds Ubiquitin rather than phosphates

2 targets

17
Q

after attaching ubiquitins

polyubiquinated proteins are broken down by

A

Proteasomes

18
Q

G1 Cdk is activated by

A

G1 checkpoint

19
Q

S cdk is activated by

A

beginning of s phase

20
Q

M-cdk is activated by

A

beginning of mitosis

21
Q

APC is activated

A

At the end of metaphse