Pre class reading quiz 11

Many tissues retain the ability to renew themselves and to repair damage because they contain a few ___________________.

static cell populations

none of these is correct

molecules of telomerase

stem cells

stem cells

cytoplasmic division of a cell is called ____

cytokinesis

cleavage furrowing

mitotic spindle formation

mitosis

synapsis

cytokinesis

What is the process called through which adult stem cells divide and produce specialized cells for tissue repair and replacement?

regeneration

differentiation

reprogramming

dedifferentiation

differentiation

What is the function of apoptosis?

to shape organs during development

to weed out cells that grow uncontrollably

to allow the immune system to distinguish self from non self

all options are correct

all options are correct

The type of programmed cell death that is a part is normal development is called ________________.

apoptosis

angiogenesis

cytokinesis

necrosis

apoptosis

In which phase of cell cycle is DNA replicated?

s phase

G1 phase

G2 phase

M phase

S phase

What is the difference between apoptosis and necrosis?   

Apoptosis is cell death due to damage that occurs during embryogenesis; necrosis is cell death due to damage that occurs during adulthood.

Apoptosis is a term used to refer to necrosis that happens during development. 
Apoptosis is the death of a differentiated cell; necrosis is the death of an undifferentiated cell. 

Apoptosis is a property of all differentiated cells; necrosis only occurs to undifferentiated cells.

Apoptosis is a controlled program of cellular destruction; necrosis is cell death due to damage. 

Apoptosis is a controlled program of cellular destruction; necrosis is cell death due to damage. 

Which of the following is the correct sequence of mitotic phases?

metaphase, anaphase, telophase, prophase
prophase, metaphase, anaphase, telophase

anaphase, prophase, metaphase, telophase

prophase, anaphase, metaphase, telophase

prophase, metaphase, telophase, anaphase

prophase, metaphase, anaphase, telophase

Passage of a cell through stages of cell cycle is controlled by a protein kinase that phosphorylates many different proteins at appropriate times.

Cyclins

Cdk activating kinase

Cyclin-dependent kinase

Tyrosine kinase

Cyclin-dependent kinase

Cyclin dependent kinases which control progression through cell cycle checkpoints are totally activated by which of the following?

Binding to cyclins

Phosphorylation by Cdk activating protein kinase

Phosphorylation by a tyrosine kinase

Binding to cyclin, plus phosphorylation by a Cdk activating protein kinase

Binding to cyclin, plus phosphorylation by a Cdk activating protein kinase

Stem cells are unique cells with the ability to:

Specialize into different cell types

Fight infections

Transmit genetic information

Divide uncontrollably

Specialize into different cell types

What is the role of the caspases in apoptosis?

Caspase is a term used to refer to the initial signal that causes apoptosis.

Caspases are proteases that carry out the controlled destruction of the cell's components during apoptosis.

Caspases are enzymes that are inactivated during apoptosis, and in their absence the cell dies.

Caspases are inhibitors of apoptosis; the destruction of the caspases causes apoptosis to begin.

Caspases are mitochondrial enzymes that are released when apoptosis is triggered.

Caspases are proteases that carry out the controlled destruction of the cell's components during apoptosis.