Chapter 7 Multiple choice Questions

. When events are separated by location in cells they are said to be which of the following?

Separated.

Isolated.

Compartmentalised.

Segregated.

. The threshold level needed to trigger cell signalling is which of the following?

The concentration at which signalling is maximal.

The concentration at which signalling proceeds.

The concentration at which signalling is minimal.

The concentration at which signalling stops forever.

. CRSPR-Cas9 is a technology which allows which of the following?

Gene editing.

The activation of kinases.

The activation of a receptor.

Protein removal from the cell.

. Patch clamping is a technology which is useful for examining which of the following?

Kinase activation.

DNA synthesis.

The concentration of cAMP in cells.

Ion channels.

. Which of the following cannot be used to follow the movement of proteins in cells?

cAMP.

GFP.

YFP.

Confocal microscopy.

. Fluorescence can be best described as which of the following?

Reflected light.

Absorbed light.

Light emitted after excitation of light of a different wavelength.

Non-visible light.

. Microarrays can be used to measure which of the following?

Gene expression.

The concentration of cAMP in cells..

Kinase activity.

The concentration of ATP in cells.

. The proteome is which of the following?

The level of a single protein in a cell.

The complement of proteins in a cell.

The amount of DNA in a cell.

The amount of RNA in a cell.

. A moonlighting protein is which of the following?

A protein only expressed in line with the lunar cycle.

A protein only expressed in the dark.

One which has more than one role in the cell.

A protein which is only used at night.

. Which of the following is most likely to be true?

The human genome has been sequenced so all signalling proteins are now known.

Cell signalling is not complex enough to give an expectation of the discovery of new components.

Not all the molecules which are involved in cell signalling mechanisms have been discovered.

There is no scope to discover more cell signalling molecules as cells are not big enough.

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