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Flashcards in science: chpt. 6 test Deck (26):
0

Large molecules that are formed by joining smaller molecules

Macromolecule

1

Substance releases H+ in water

Acid

2

Measures the concentration of H+ in a solution

pH

3

Left —> Right

Reactants —> Products

4

A ________ uses van der Waals forces to climb

Gecko

5

Same element with a different number of neutrons

Isotopes

6

Proton

p+

p=proton
+=because it's positive

7

Electron

e-

e=electron
-=because it's negative

8

Neutron

n *insert degree sign*

n=neutron
*degree sign*=because it has no charge

DO NOT WRITE: zero charge
It's neutral charge or no charge

9

A weak interaction of hydrogen, fluorine, oxygen, or nitrogen atom

Hydrogen bond

10

Molecules with an unequal distribution of charge

Polar molecules

11

Pure substances made of one kind of atom

Elements

12

Formed by the sharing of electrons

Covalent bond

13

How do enzymes influence a reaction?

Reduce activation energy

14

A hydrogen bond forms between a hydrogen molecule and _________ of another molecule

Oxygen molecule

15

When paper burns in a fire, what are some reactants?

Paper, oxygen

16

Give examples of solutions.

Tea, kool-aid, saltwater

17

Give examples of colloids.

Milk, paint, blood, sour cream

18

What happens to pH and H+ concentration when an acid is in water?

pH goes down, H+ concentration goes up

19

How many bonds can carbon form?

4

20

If an atom has 18 protons, how many electrons does it have?

18

21

How many atoms are in: CO2, C6H12O6

CO2-3
C6H12O6-24

22

How many valence electrons are in: Group 17, Group 16, Group 1, Group 2

G 17 (seven)
G 16 (six)
G 1 (one)
G 2 (two)

*Only applies to Groups 1, 2, 13-18

23

What elements are in carbohydrates?

Carbon, hydrogen, oxygen

24

What macromolecule contains you genetic information?

DNA

25

Essay: How do catalysts speed up the rate of reaction?

A catalyst is a substance that lowers the activation energy needed to start a chemical reaction. Catalysts do not increase how much product is made and doesn't get used up in the reaction. Special proteins called enzymes are biological catalysts. Enzymes are essential to life. Most enzymes are specific to one reactions the reactants that bind to the enzyme are called substrates. The specific location where a substance binds on an enzyme is called the active site. The active site and substrates have complementary shapes that enables them to interact in a precise manner. Once the substrates bind to the active site, it changes shape and forms an enzyme-substrate complex. Factors such as pH, temperature, and other substances affect enzyme activity.

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