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I need answers in less than 30 minutes... only answers. The fluid...

I need answers in less than 30 minutes... only answers.

The fluid mosaic model describes membranes as fluid due to

  A.phospholipids sporadically placed throughout the membrane

  B.the membrane is mostly composed of water

  C.the proteins and the phospholipids can move laterally throughout the membrane

  D.higher amounts of cholesterol

  E.higher amounts of cholesterol

To break chemical bonds to start a chemical reaction, ___________ energy is needed.

  A.kinetic

  B.potential

  C.activation

  D.free

How are the membrane components oriented?

  A.The hydrophobic heads are oriented towards the outside of the cell and the hydrophilic tails are oriented towards the inside of the cell.

  B.The hydrophilic heads are oriented towards the outside and the inside of the cell and the hydrophobic tails are oriented towards each other.

  C.The hydrophobic heads are oriented towards each other and the hydrophilic tails are oriented towards the outside and inside of the cell.

  D.The hydrophobic heads are oriented towards the inside of the cell and the hydrophilic tails are oriented towards the outside of the cell. 

What examples describe the second law of thermodynamics? Select all that apply.

  A. A penny will fall when you pick it up and let it drop.

  B. A frying pan is on a hot stove. When removed it will cool.

  C. Ice cubes will melt in a warm room.

  D. Donuts nutrients are used to help you exercise.

You are designing a museum exhibit to teach people about cells. In the entrance to the exhibit, visitors riding a moving walkway under flashing lights will gradually "shrink" down in size. To create this illusion, visitors will pass giant models of various biological parts, accompanied by scale bars.
Match each model to the appropriate scale bar to go with it.

A. 1 μm

B. 1cm

C. 10μm

D. 0.1 nm

E. 1m

F. 1nm


 

1. Carbon atom

 

2. cell nucleus

 

3. DNA molecule (10bp)

 

4. human being

 

5. human eyeball

 

6. skin cell

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