BIO 201 – Which of the following is an advantage of multicellularity

10 Jun BIO 201 – Which of the following is an advantage of multicellularity

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Question 1

1. Which of the following is an advantage of multicellularity?

Easier to absorb nutrients

More stable

Greater potential for increased mobility

All of the above

0.5 points

Question 2

1. Proteoglycans and peptidoglycan share the fact that they:

Are proteins that are heavily glycosylated

Are found only in Eukaryotes

are found only in bacteria

Are secreted

0.5 points

Question 3

1. The most fundamental function of the epithelium in animals is to prevent entry of pathogens and toxins from the environment. Which of the following is common to all epithelial cells?

They are columnar.

They are held together by tight junctions.

They are ciliated.

They have very high levels of cholesterol in their membranes.

0.5 points

Question 4

1. Shown below are the results of two fluorescence recovery after photobleaching (FRAP) experiments. Which of the following could explain the difference between the data represented by the dashed line as compared to the data represented by the solid line?

The membrane of the cell indicated by the dashed line contains lipid rafts.

The membrane of the cell indicated by the dashed line contains phospholipids with more unsaturated fatty acids.

The membrane of the cell indicated by the dashed line is more fluid.

The membrane of the cell indicated by the dashed line has fewer proteins.

0.5 points

Question 5

1. Which of the following can diffuse most easily through the cell membrane?

Ions

O2

glucose

water

0.5 points

Question 6

1. Extracellular chloride ion (Cl-) concentrations are much higher than intracellular. This gradient is maintained in part by co-transport of K+ and Cl- out of the cell using indirect active transport. Maintenance of the Cl- concentration gradient using this mechanism is therefore dependent on:

Ca++ channels

Facilitated diffusion

high extracellular glucose

The Na+/K+ ATPase

0.5 points

Question 7

1. Unlike in animals, in which the Na+ gradient is used, it is the H+ gradient in plants, fungi, and protists that fuels transport of other compounds up their concentration gradients. This is an example of:

Simple diffusion.

Facilitated diffusion.

Direct active transport

Indirect active transport

0.5 points

Question 8

1. Which of the following is an advantage of endocrine signaling?

It is fast.

It affects large numbers of cells.

It can be bidirectional.

All of the above

0.5 points

Question 9

1. Which of the following can be considered both an advantage and a disadvantage of juxtacrine signaling?

It is slow.

It affects only only one or a small number of cells.

It can be bidirectional

All of the above

0.5 points

Question 10

1. Liver cells respond to epinephrine by breaking down glycogen. What is the second messenger in this patway?

ATP

Adenine

Acetylcholine

Cyclic AMP