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Flashcards in phys6final10 Deck (19):
1

Water is an excellent solvent (It can dissolve many substances) because

it has polar covalent bonds.

2

Because water has a high heat of vaporization it

provides an excellent cooling mechanism.

3

A polysaccharide that is found in muscle and liver cells is

glycogen

4

Which of these substances would form an acid when dissolved in water?

HCI

5

About 18 - 25% of the total body mass of a lean adult is made up of

lipids

6

The chemical symbols for potassium, iron and phosphorus are____, _____, and _____ respectively.

K, Fe, P

7

Some molecules are said to be amphipathic because they

have both polar and nonpolar regions.

8

One end of aphospholipid is hydrophilic because

the head is a polar phosphate group

9

The building blocks of proteins are

amino acids.

10

All steroids contain

four rings of carbon atoms

11

Amino acids are different from each other because of the

structure of the side chain (R group)

12

The tertiary structure of a protein refers to the

three dimensional shape of the molecule.

13

If a protein encounters a change in temperature, pH, or electrolyte concentration it will

unravel and lose its characteristic shape

14

Which is a component of DNA, but not of RNA?

thymine

15

The portion of an enzyme where the substrates attach is called the

active site

16

The names of enzymes usually end with the suffix

-ase

17

DNA and RNA contain the pentose sugars

deoxyribose and ribose

18

A technique used in research and a variety of legal situations using the chemicals obtained from the nuclei of cells is called,

DNA fingerprinting

19

The chemical called the "energy currency" of living systems is

ATP