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Biology > Ch 2 Vocab > Flashcards

Ch 2 Vocab Flashcards

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0
Q

Electron

A

Negatively charged particle

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1
Q

Nucleus

A

Center of the atom

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2
Q

Element

A

Pure substance, one type of atom

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3
Q

Isotope

A

Same element atoms with different number of neutrons

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4
Q

Compound

A

A substance formed by the chemical combination of two or more elements in definite proportions

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5
Q

Ionic bond

A

One or more electrons transferred from one atom to another

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6
Q

Covalent bond

A

Electrons are shared between atoms

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7
Q

Molecule

A

Smallest unit of most compounds

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8
Q

Van dee waals forces

A

Intermolecular forces of attraction

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9
Q

Polar molecule

A

A molecule in which the chargers are unevenly distributed

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10
Q

Mixture

A

A material composed of two or more elements or compounds that are physically mixed together

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11
Q

Solute

A

The substance that is dissolved

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12
Q

Solvent

A

The substance in which the solute dissolves

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13
Q

Suspensions

A

A mixture of water and a mom dissolved material

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14
Q

PH

A

Indicate the concentration of H+ ions in a solution

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15
Q

Acid

A

A compound that forms H+ ions in a solution

16
Q

Base

A

any compound that forms hydroxide ions (OH- ions) in a solution

17
Q

Monomers

A

The smaller unit in a polymer

18
Q

Polymers

A

Monomers that join together

19
Q

Carbohydrates

A

Compounds make up of carbon hydrogen and oxygen atoms 1:2:1

20
Q

Monosaccharides

A

Single sugar molecules

21
Q

Polysaccharides

A

Large macromolecules formed from monosaccharides

22
Q

Lipids

A

A large and varied group of biological molecules that are generally not soluble in water; made mostly from carbon and hydrogen atoms

23
Q

Saturated

A

Fatty acids contain the maximum possible number of hydrogen atoms

24
Q

Unsaturated

A

There is at least one carbon-carbon double bond in a fatty acid

25
Q

Nucleic acids

A

Are macromolecules containing nitrogen, hydrogen, oxygen, carbon, and phosphorus

26
Q

Nucleotides

A

consist of three parts: 5-carbon sugar, phosphate group, and a nitrogenous base

27
Q

RNA

A

Contains sugar ribose

28
Q

DNA

A

Contains sugar deoxyribose

29
Q

Proteins

A

Macromolecules that contain nitrogen, carbon, oxygen, and hydrogen

30
Q

Amino acids

A

Proteins are polymers of molecules

31
Q

Chemical reaction

A

The process that changes one set of chemicals into another set of chemicals

32
Q

Activation energy

A

The energy that is needed to get a reaction started

33
Q

Catalyst

A

A substance that speeds up the rate of a chemical reaction

34
Q

Enzymes

A

Proteins that act as biological catalysts

35
Q

Substrates

A

The reactants of enzyme-catalyzed reactions

36
Q

Active site

A

The substrates bind to a site on the enzyme

Biology (13 decks)

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