Chapter 2 bio

Question 0

What are the four most common elements found in organisms

Answer 0

Carbon hydrogen oxygen and nitrogen

Question 1

Identify the subatomic particles that make up atoms

Answer 1

atoms are made up of protons neutrons and electrons,
Proton positive
Neutron neutral
Electron negative

Question 2

Define isotopes

Answer 2

Equal number of protons but different numbers of neutrons

Question 3

Compare and contrast covalent and ionic bonds

Answer 3

Ionic - forms through the electrical force between positively charged ions
Covalent bond – forms on atoms share a pair of electrons

Question 4

Molecule

Answer 4

A group of atoms bonded together representing the smallest fundamental unit of chemical compound that can take part in a chemical reaction

Question 5

Why do compounds dissolve in water

Answer 5

Partially negative oxygen Atoms and water molecules attract the positively charged sodium ions

Question 6

Compare and contrast cohesion and adhesion

Answer 6

Cohesion is the attraction among molecules of the same substance and adhesion is the attraction among molecules of different substances

Question 7

Compare and contrast solutions and suspensions

Answer 7

A solution is a mixture of substances that is the same throughout
Hey suspension is when a mixture can be shooken for a long time and separated

Question 8

Difference between acids and bases

Answer 8

Houses have a pH less than seven and and bases have a pitch more than seven and exact pH of seven is neutral

Question 9

Construct a PH scale showing one acid, one base, and one neutral substance.

Answer 9

Lemon juice is acidic milk is neutral and ammonia is basic

Question 10

Explain HONC

Answer 10

H stands for hydrogen oh stands for oxygen and stands for nitrogen and Seastans for carbon and in the order is the number of bonds

Question 11

List the four major classes of macromolecules found in living things

Answer 11

The four major macromolecules are carbohydrates lipids proteins and nucleic acid

Question 12

Atom

Answer 12

Smallest basic unit of matter

Question 13

Element

Answer 13

Is one particular type of Adam and I cannot be broken down into simpler substances by ordinary chemical means

Question 14

Compound

Answer 14

A substance made up of Adams of different elements bonded together in a certain ratio example H2O

Question 15

Ion

Answer 15

Is an atom that has gained or lost one or more elements and I on forms because an atom is more stable when it’s outermost energy level is full

Question 16

Chemical bond

Answer 16

Interaction between electrons of different Atoms

Question 17

Ionic bond

Answer 17

Electrons are transferred

Question 18

Covalent bond

Answer 18

Electrons are shared

Question 19

Molecule

Answer 19

Is two or more Adams held together by covalent bond in the compound carbon dioxide each. Oxygen Adam shirts two pairs of electrons for electrons with carbon bonds

Question 20

Hydrogen bond

Answer 20

Is an attraction between a slightly positive hydrogen Atom I was slightly negative Atom

Question 21

Polar

Answer 21

Charges unevenly distributed due to the atoms having an unequal pull on the shared electrons

Question 22

Cohesion

Answer 22

The attraction among molecules of the same substance

Question 23

Adhesion

Answer 23

Attraction my molecules of different substances

Question 24

Salute

Answer 24

Substance that dissolves in a solvent

Question 25

Plasma

Answer 25

Liquid part of your blood

Question 26

Acid

Answer 26

Compound that releases a proton the hydrogen ion H positive when it is dissolved in water

Question 27

Base

Answer 27

Compounds that remove H positive ions from solution

Question 28

Macromolecules

Answer 28

Are big

Question 29

Electron

Answer 29

A subatomic particle with a negative elementary electric charge

Question 30

Hydrogen bond

Answer 30

is an electro state of attraction interaction between polar molecules in which hydrogen age is bound to highly electronegative Adam such as nitrogen oxygen or fluorine

Question 31

Endothermic

Answer 31

Chemical reaction absorbs more energy going to releases

Question 32

Exothermic

Answer 32

Reaction releases more energy than absorbs

Question 33

Catalyst

Answer 33

A substance that increases the rate of chemical reaction without itself undergoing any permanent chemical change

Question 34

Organic chemistry

Answer 34

Is a chemistry involving carbon Atoms organic compounds and materials

Question 35

Lipid

Answer 35

A group of naturally occurring molecules that includes fats waxes sterile's and fat-soluble vitamins

Question 36

Starch

Answer 36

Starch is a carbon hydrate consisting of a large number of glucose units joint together but Bonds

Question 37

Nucleotide

Answer 37

Are organic molecules that serve as monomers for subunits or nucleic acid DNA and RNA

Question 38

Hydrolysis

Answer 38

Usually means the cleavage addition of water where component by sugar molecules

Question 39

Active site

Answer 39

Active site is a small port in and enzymes were substrate molecules by undergo a chemical reaction

Question 40

Atomic nucleus

Answer 40

Nucleus is a very dense region consisting of nucleons protons and neutrons at the center of an Adam almost all of the mass monogamous made up for the protons and neutrons in the nucleus with a very small contribution from the orbiting electrons

Question 41

Atomic number

Answer 41

is the number of protons found in the nucleus of an atom

Question 42

Molecule

Answer 42

Electrically neutral group of two or more Atoms held together by chemical bonds

Question 43

Ph

Answer 43

Measure of acidity or Basicity of the solution

Question 44

Enzyme

Answer 44

Are macromolecules that her biological catalysts

Question 45

Monomer

Answer 45

Is a molecule that may bind-chemically two molecules to form a polymer

Question 46

Nucleic acid

Answer 46

Polymeric macromolecules or large biological molecules a sensual for all known forms of life

Question 47

Polymer

Answer 47

Large molecule or macromolecule composed of many repeated subunits

Question 48

Orbital

Answer 48

The wave function of electrons in an atom or molecule

Question 49

Activation energy

Answer 49

Means the minimum amount of energy that must be put to a chemical system with potential reactance to cause a chemical reaction

Question 50

Active site

Answer 50

Is a small portion enzyme where subtract molecule binds and undergo a chemical reaction

Question 51

Carbohydrate

Answer 51

Carbohydrate is a large biological molecules or macromolecule consisting of carbon see hydrogen age oxygen Adams

Question 52

Polypeptide

Answer 52

A polypeptide is a long continuous and under branch peptide chain heads peptides fall under the broad chemical classe

Question 53

fatty acid

Answer 53

In chemistry particularly in biochemistry fatty acid is a carboxyl acid

Question 54

Dehydration synthesis

Answer 54

Remove to hydrogens and one oxygen replacing them with a long tail