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Biology - Chapter 6 Review - Biochemistry

Total questions: 58

Worksheet time: 29mins

Name
Class
Date
1.

Special molecules that are or were once in living things and always contain carbon and hydrogen are known as __  molecules

a)

organic

b)

inorganic

c)

polymer

d)

monomer

2.

When the monomers repeat over and over again, a(n) ________ is created. 

a)

organic molecule

b)

inorganic molecule

c)

polymer

d)

DNA

3.

The organic molcule which includes fats, waxes, oils, and cholesterol ________

a)

carbohydrates

b)

lipids

c)

nucleic acids

d)

proteins

4.

An organic molcule made up of amino acids that is important in creating enzymes and is involved in nearly every bodily function is ___

a)

carbohydrates

b)

lipids

c)

nucleic acids

d)

proteins

5.

The organic molecule is important is transmitting genetic information and is known as _.

a)

carbohydrates

b)

lipids

c)

nucleic acids

d)

proteins

6.

The organic molelcul important for short term energy storage and contains carbon, hydrogen, and oxygen elements at a ration of 1:2:1 are called ______.

a)

carbohydrates

b)

lipids

c)

nucleic acids

d)

proteins

7.

Elements will join other elements so that there are eight ___ electrons or electrons found in the outermost shell.

a)

inner shell

b)

lower energy

c)

valence

d)

higher energy

8.

If there are two or more different elements that combine a(n) _______ has been created. 

a)

atom

b)

element

c)

molecule

d)

compound

9.

f there are two or more elements that may be the same or different but are bonded by a covalent bond, a(n) _________ has formed. 

a)

element

b)

compound

c)

molecule

d)

hydrogen bond

10.

When elements bind together, they go through a chemical reaction.  This can be written as a chemical equation.  If the elements or compounds are written on the left side of the arrow, they are known as ___________

a)

reactants

b)

products

c)

activation energy

d)

catalyst

11.

In a chemical reaction, ________are written on the right side of the arrow.

a)

Reactants

b)

Products

c)

Activation enzymes

d)

Catalysts

12.

The energy required for a chemical reaction to occur is known as ___________ energy.

a)

starter

b)

activation

c)

heat

d)

chemical

13.

_________ is anything that has mass and takes up space

a)

Proton

b)

Electron

c)

Matter

d)

Neutron

14.

The building blocks of matter are ______.

a)

atoms

b)

protons

c)

neutrons

d)

electrons

15.

The positively charged particle that makes up an atom is _____.

a)

a quark

b)

an electron

c)

a neutron

d)

a proton

16.

The neutrally charged particle of an atom found in the nucleus is ______.

a)

an electron

b)

a quark

c)

a neutron

d)

a proton

17.

The part of the atom where protons and neutrons are located is _____.

a)

the electron cloud

b)

the nucleus

c)

the subatomic space

d)

all of the options listed

18.

The negatively charged particles of an atom are _____.

a)

electrons

b)

neutrons

c)

quarks

d)

protons

19.

A chemical property which will cause water to break down into hydrogen ions is ____.

a)

oxidization

b)

flammability

c)

pH

d)

light sensitivity

20.

Atoms that have a charge - such as a positive or negative charge are called _____, like H+.

a)

ions

b)

protons

c)

neutrons

d)

electrons

21.

If a substance, like HCl, tends to increase the number of H+ ions when placed in water, it is considered _____.

a)

a base

b)

an acid

c)

a buffer

d)

none of the options listed

22.

If a substance tends to decrease the number of H+ ions if added to water, such as NaOH, this is known as ______.

a)

a base

b)

an acid

c)

a buffer

d)

none of the options listed

23.

A substanced that can be added to an acid or base to neutralize it is known as ______.

a)

a base

b)

a buffer

c)

an acid

d)

a catalyst

24.

Elements of the same type that have the same number of protons and neutrons but a different number of neutrons are called _____. 

a)

electrons

b)

isomers

c)

isotopes

d)

enzymes

25.

Special proteins in the body that act as biological catalysts are known as ____.

a)

lipids

b)

saturate fats

c)

amino acids

d)

enzymes

26.

Enzymes act as _______, speeding up the rate of reations by lowering the activation energy.

a)

antagonists

b)

catalysts

c)

protagonists

d)

all of the options listed

27.

The amount of energy needed to start a chemical reaction is known as _______.

a)

activation energy

b)

start up energy

c)

catalyst

d)

enzyme

28.

The molecule or molecules that an enzyme works on is known as a ______.

a)

worker molecule

b)

substrate

c)

catalyst

d)

buffer

29.

The place on the enzyme where the enzyme and the substrate meet is called ____.

a)

the iniation site

b)

the activation site

c)

the active site

d)

the allosteric site

30.

The smaller units that make up larger polymers is known as _____.

a)

molecules

b)

atoms

c)

subunits

d)

monomers

31.

Water is a ______ molecule, meaning that it does not share its electrons evenly and has a slightly positive side and a slightly negative side.

a)

all of the options listed

b)

neutral

c)

polar

d)

bipolar

32.

The bonds that form between various molecules of water due to its polarity are called _______ bonds.

a)

hydrogen

b)

ionic

c)

covalent

d)

electrical

33.

Substances that are combined retain their own properties because the components don't chemically combine are called _____.

a)

elements

b)

compounds

c)

mixtures

d)

ions

34.

Another name for a homogenous mixture is _____.

a)

a solvent

b)

a solution

c)

a suspension

d)

a solute

35.

Water is often a ______ meaning that other things often easily dissolve in it.

a)

solvent

b)

solute

c)

solution

d)

mixture

36.

Substances that get dissolved in water in a mixture are referred to as ______

a)

solvents

b)

solutes

c)

mixtures

d)

compounds

37.

This diagram shows water molecules. Which option correctly identifies the numbers with the things they represent?

a)

1 is a covalent bond

2. is the Hydorgen Atom

3 is a hydrogen bond

4 is the Oxygen atoms

b)

1 is the Hydrogen atom

2 is the Oxygen atom

3 is a covalent bond

4 is a hydrogen bond

c)

1 is Oxygen atom

2 is the hydrogen atom

3 is a covalent bond

4 is a hydrogen bond

d)

1 is Oxygen atom

2 is the hydrogen atom

3 is a hydrogen bond

4 is a covalent bond

38.

When salt is added to water, the salt dissolves in the water creating a mixture with a uniform composition.  The salt water is known as a(n) _________.

a)

solution

b)

suspension

c)

compound

d)

element

39.

When H is placed near Cl, the result is HCl.  This rearrangement of atoms into a new substance is know as a(n) ____________.

a)

rearrangement

b)

isotope

c)

chemical reaction

d)

covalent bond

40.

In the chemical reaction C6H12O6 + 6 Oyields 6 CO2 + 6 H2O, the CO2 and H2O are examples of __________.

a)

reactants

b)

products

41.

Carbon-12 and Carbon-14 are examples of _____________.

a)

ionic bonds

b)

compounds

c)

isomeres

d)

isotopes

42.

Look at the substances X + Y.  These are the starting substances in a chemical reaction that would be written on the left side of the arrow in a chemical reaction.  X + Y are examples of ___________.

a)

reactants

b)

products

c)

activation energy

d)

atoms

43.

When Potassium (K) and chorine (Cl) are mixed together, potassium gives up one of its electrons to chlorine so that both are stable.  This cause the potassium and the chlorine to become electrically charged and attracted to each other.  This attraction is known as a(n) ___________.

a)

covalent bond

b)

ionic bond

c)

isotope

d)

isomer

44.

Look at the diagram above.  Area A shows the minimum amount of energy needed for reactants to form products in a chemical reaction.  This is known as ______________

a)

activation energy

b)

reactants

c)

products

d)

substrate

45.

A substance was placed into water.  It had a 1.0 x 10 -6 chance of making H+ ions.  What would its pH be?

 

a)

5

b)

6

c)

3

d)

8

46.

When NaCl is mixed into water (H2O), both the water and the salt (NaCl) retain their own properties.  The salt water would be an example of a(n) _______________.

a)

ionic bond

b)

covalent bond

c)

chemical reaction

d)

mixture

47.

When glucose (C6H12O6) is mixed with water, the glucose is the substance dissolved by water.  The glucose would be known as the ___________.

a)

solute

b)

solvent

c)

reactant

d)

product

48.

Which substance has a one in 10,000 chance of causing H+ ions to be released when added to water?

a)

orange juice

b)

acidic soil

c)

hydrochloric acid

d)

bleach

49.

What type of change is tearing paper into small pieces?

a)

physical

b)

chemical

50.

If medication is crushed, is this a chemical or physical change?

a)

physical

b)

chemical

51.

Is souring milk a physical or chemical change?

a)

physical

b)

chemical

52.

Lightening is what state of matter?

a)

solid

b)

liquid

c)

gas

d)

plasma

53.

Which state of matter has the least amount of energy?

a)

solid

b)

liquid

c)

gas

d)

plasma

54.

If sodium hydroxide is added to water, the temperature will rise. What type of reaction is this?

a)

exothermic

b)

endothermic

55.

Does this graph show an exothermic or endothermic reaction?

a)

exothermic

b)

endothermic

56.

Oxygen has a total of 8 electrons.  How many valence electrons does it have?

a)

8

b)

6

c)

2

d)

4

57.

Aluminum has  13 protons and an atomic number of 27.  How many neutrons does it have?

a)

13

b)

14

c)

27

d)

0

58.

Which of the following statements is true of carbon?

a)

it along with H make up all organic molecules

b)

it is a very important element to living organismscc

c)

because it needs 4 more electrons, it can form molecules that have long chains and rings

d)

all statements are true