Biology Jeopardy Ch 2 ReviewSection 1 Section 2 Section 3 Section 4 Labs Terms

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A weak attraction between polar molecules is called a ____ bond.

hydrogen

2

Atoms share electrons in a ____ bond.

covalent

3

True or False: Covalent bonds form when two or more

atoms share electrons.

True

4

A nucleotide has four parts? True or False

False – they have 3 parts

5

A substance that is composed of only one type of atom is

called a(n)

Element

6

Acidic solutions have a pH that is

less than 7.

7

Hydrogen ions, H+, react with hydroxide ions, OH-, to form

Water

8

When placed in the same container, oil and water do not

mix because

water is polar and oil is nonpolar.

9

Water is important to life because it?

surrounds all cells,

is found inside cells, and

influences the shape of the cell membrane.

10

_____ allows a needle to float on the water.

Surface tension

11

A molecule shaped like a spiral staircase (double helix)

is typical of

deoxyribonucleic acid.

12

ATP (adenosine triphosphate) stores energy for cells to use

in the bonds between its

phosphates.

13

DNA stores

heredity information.

14

The two types of nucleic acids are

DNA and RNA.

15

The shape of a protein is primarily determined by

the type and sequence of its amino acids.

16

Most enzymes are?

proteins

17

Energy needed for metabolism comes from?

Foods – lipids, proteins, carbohydrates

18

____ are biological catalysts.

enzymes

19

The molecule on which an enzyme acts is called a(n)

substrate.

20

Without enzymes, the chemical reactions in your

body would

occur too slow to support life processes.

21

Benedict’s solution is used to detect the presence of?.

reducing sugars, such as glucose.

22

Lugol’s iodine solution is used to detect the presence of

starch.

23

Amylase is a digestive enzyme that breaks down

starch into

cellulose.

24

Due to the polarity of water, compounds that dissolve best

in water contain

polar bonds.

25

Many laundry detergents contain _____, which make

removal of stains easier.

enzymes

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made of only one type of atom

element

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attraction between different substances

adhesion

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attraction between molecules of the same substance

cohesion

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evenly distributed mixture

solution

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a substance made of the joined atoms of two or more

different elements

compound

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