Chapter 1 Multiple choice Questions

. Cell signalling is important because of which of the following?

It only happens in humans.

It is only applicable to animals.

It does not cause disease.

It controls the workings of cells in all organisms.

. The movement of a message through a cell is referred to as which of the following?

Message transduction.

Message movement.

Signal transduction.

Signal enhancement.

. A good signalling molecule will have which of the following characteristics?

It has to be organic.

Only small diffusible molecules can act as signals

Any molecule can be a signal as long as it is perceived correctly.

They have to be soluble in water.

. Which are not true about signal transduction pathways?

They allow for signal amplification.

They allow for crosstalk.

They usually have multiple components.

They always lead to the nucleus.

. Reversal of signalling is important because of which of the following?

Once used a signalling pathway is never needed again.

Often a signalling pathway needs to be re-used in the future.

It allows signalling components to be broken down and used for other things.

Signalling pathways are not needed once an organism is fully grown.

. Cell signalling molecules are often produced from ubiquitous (already present) substrates because of which of the following?

It gets rid of common molecules in cells.

It allows the production of signals to be relatively easy and quick.

It stops enzymes making the wrong products.

It stops other signalling pathways from working.

. Proteins are often grouped into families. Which of the following is not true about why organisms have different versions of the same protein.

Different protein variants may have different cellular locations.

Different protein variants can be regulated in different ways.

Different protein variants may have different downstream signalling.

Different protein variants are never expressed at the same time.

. Which is not true about cell signalling research?

The volume of papers published in cell signalling is increasing.

The history of cell signalling research spans well over a hundred years.

Many researchers in the field of cell signalling have been award major prizes, such as the Nobel Prize.

There is no future for cell signalling research as all that is needed to be discovered has been found.

. When two or more signal transduction pathways interact with each other there is said to be which of the following?

Crosstalk.

Cross-chatter.

Cross interference.

Transduction.

. Medicines and new drugs are often targeted against cell signalling pathways because of which of the following?

Cell signalling is not complex so is easy to target.

It is easy.

Only cancer is caused by cell signalling mechanisms going wrong.

Cell signalling dysfunction is often the cause of disease.

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