Hydrophobic definition - quiz - Biology Articles, Tutorials & Dictionary Online

Quiz

Choose the best answer.

1. What is hydrophobic?

Having an affinity for water

Soluble in water

Repelling water

Water-loving

2. Which of the following is hydrophobic?

Detergents

Cellulose

Starch

Phospholipid

3. Which of the following exemplifies the importance of hydrophobicity?

In plants, the hydrophobic layer on the leaf surface helps prevent water loss

The hydrophobic feathers of birds repel water and thus help keep them stay lightweight

The hydrophobic region of the plasma membrane helps prevent easy access of polar molecules, including water.

All of the above

4. The contact angle of a superhydrophobic surface

5 degrees

90 degrees

120 degrees

180 degrees

5. Which of the following is a feature of a hydrophobic substance?

nonpolar

polar

a contact angle of 3 degrees

strong affinity for water molecules

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