Michael Jardine
Quiz por , criado more than 1 year ago

Learning objectives: * Understand the difference between cell growth and proliferation * Describe the major events of the cell cycle * Appreciate the roles of cyclins and cyclin-dependent kinases in regulating cell cycle progression * Provide examples of disordered signaling in cancer * Describe checkpoints and how they regulate the correct expression of the cell cycle * Understand the role of apoptosis in preventing inappropriate cell proliferation

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Michael Jardine
Criado por Michael Jardine mais de 6 anos atrás
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PHSI3012 01-1 Cell Proliferation

Questão 1 de 14

1

What is the difference between cell growth and cell proliferation?

Selecione uma das seguintes:

  • Cell growth = increase in ONE cell's mass/size; Cell proliferation = increase in cell numbers.

  • Cell growth = increase in cell numbers; Cell proliferation = increase in ONE cell's mass/size.

  • No meaningful distinction.
    (/ distinction without substantial difference)
    (/ fuck all)

Explicação

Questão 2 de 14

1

Which of the following is true?

Selecione uma das seguintes:

  • Control of cell proliferation is intrinsically linked to cell growth.

  • Control of cell growth is intrinsically linked to cell proliferation.

Explicação

Questão 3 de 14

3

The order of the rough phases of the cell cycle are as follows:
G1 > > > > (then back to G1 again)

Arraste e solte para completar o texto.

    S
    G2
    M
    Cytokinesis

Explicação

Questão 4 de 14

2

G1 phase stands for, and involves, what?

Selecione uma ou mais das seguintes:

  • Growth phase

  • Gap phase

  • Cell growth

  • Monitoring

  • Mitosis

Explicação

Questão 5 de 14

2

G2 phase stands for, and involves, what?

Selecione uma ou mais das seguintes:

  • Growth phase

  • Gap phase

  • Cell growth

  • Monitoring

  • Mitosis

Explicação

Questão 6 de 14

2

S phase stands for, and involves, what?

Selecione uma ou mais das seguintes:

  • DNA synthesis

  • Selectivity

  • Cell growth

  • Mitosis

  • Stretching

Explicação

Questão 7 de 14

2

M phase stands for, and involves, what?

Selecione uma ou mais das seguintes:

  • Mitosis

  • Meiosis

  • Monitoring

  • DNA synthesis

  • Cell division

Explicação

Questão 8 de 14

1

Cdks (Cyclin-Dependent KinaseS) are regulated by:

Selecione uma das seguintes:

  • Cyclins

  • Phosphorylation

  • Both of the above

  • [none of the above]

Explicação

Questão 9 de 14

1

Mitogens are:

Selecione uma das seguintes:

  • Things that stimulate cell division (e.g. hormones, cytokines).

  • Stimulate migration.

Explicação

Questão 10 de 14

1

Disordered signaling in cancer.
Many cancer-critical genes (oncogenes or tumour-suppressor genes) regulate cell growth and proliferation.
e.g. a mutation may lead to independence from mitogen-dependence.

Acquiring the ability to synthesise mitogens (resulting in autocrine stimulation) is one way this can happen. Some examples of this are:

Selecione uma das seguintes:

  • PDGF, TGFα - glioblastomas & osteosarcoma

  • EGF-R/erbB (epidermal growth factor receptor); HER2 (human epidermal growth factor receptor)

Explicação

Questão 11 de 14

1

Disordered signaling in cancer.
Many cancer-critical genes (oncogenes or tumour-suppressor genes) regulate cell growth and proliferation.
e.g. a mutation may lead to independence from mitogen-dependence.

Constitutive expression of their receptors (resulting in increased sensitivity?) is one way this can happen. Some examples of this are:

Selecione uma das seguintes:

  • PDGF, TGFα - glioblastomas & osteosarcoma

  • EGF-R/erbB (epidermal growth factor receptor); HER2 (human epidermal growth factor receptor)

Explicação

Questão 12 de 14

1

HER2 (Human Epidermal growth factor Receptor) mutations are present in:

Selecione uma das seguintes:

  • Overexpressed in breast cancer.

  • Overexpressed in stomach, brain, and breast cancer.

  • Abnormally present in glioblastomas and osteosarcoma.

Explicação

Questão 13 de 14

1

EGF-R / erbB (Epidermal Growth Factor Receptor) and cancer...

Selecione uma das seguintes:

  • Up-regulated in stomach, brain, and breast cancer.

  • Up-regulated in breast cancer.

  • Abnormally present in gliobastomas & osteosarcoma.

Explicação

Questão 14 de 14

1

True or false: Mitogens [usually?] act through the ras/raf/ERK cascade.

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

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