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The Chemistry of Life Flashcards | StudBud
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The Chemistry of Life
The Chemistry of Life
31 terms
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Review of atoms, elements, chemistry, and organic compounds.
Flashcards
31 cards
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Questions
31
Answers
1
An atom that has a different number of neutrons than protons is an...
amino acid
isomer
isotope
ionic bond
2
The chemical formula of methane is...
CO2
O2
H2O
CH4
3
A pH of 7 is...
acidic
neutral
soap
basic
4
All of the chemical reactions that occur within an organism are referred to as that organism's
polymers
metabolism
surface tension
polarity
5
The 20 building blocks of proteins that are linked together by condensation.
nucleotides
amino acids
polymers
isomers
6
Which of the following is an isotope of an oxygen atom that has 8 electrons and 8 protons?
8 electrons, 8 protons, 9 neutrons
8 electrons, 7 protons, and 8 neutrons
7 electrons, 7 protons, and 8 neutrons
7 electrons, 8 protons, and 8 neutrons
7
An acid is any substance that forms ______ in water.
oxygen ions
sodium ions
hydroxide ions
hydrogen ions
8
Which of these is not an element?
hydrogen
chlorine
water
sodium
9
In a water molecule, each _____ atom shares one electron with the single _____ atom.
oxygen, hydrogen
hydrogen, oxygen
hydrogen, carbon
oxygen, carbon
10
Which of the following pairs is unrelated?
fat-lipid
sugar-carbohydrate
amino acid-protein
starch-nucleic acid
11
Which of the following carbohydrates is a polysaccharide?
fructose
starch
glucose
sucrose
12
Which feature of water explains why water has high surface tension?
water is a polar molecule
water expands when it freezes
water's high heat of vaporization
water's resistance to temperature change
13
The master copy of an organisms information code – forms the genetic code.
Ribonucleic acid
polymers
deoxyribonucleic acid
sucrose
14
Proteins are long chains or polymers of _______.
amino acids
monosaccharides
fatty acids
nucleotides
15
A calcium atom has 20 protons. How many electrons does this atom have?
30
40
10
20
16
Chemical equations need to be ________ because atoms are never created nor destroyed.
fast
positive
balanced
negative
17
The process of water being added to polymers.
sublimation
evaporation
hydrolysis
condensation
18
Which of the following is NOT a smaller subunit of a nucleotide?
nitrogen base
ribose sugar
glycerol
phosphate
19
Which of the following describes a water molecule?
The atoms in water are bonded by ionic bonds.
Water molecules have negatively charged ends.
Water is a nonpolar molecule.
The bond between two water molecules is a covalent bond.
20
Which of these cannot be considered a lipid?
corn oil
olive oil
butterfat
sugar
21
What are the basic building blocks of matter?
atoms
proteins
carbon
DNA molecules
22
A protein that speeds up a chemical reaction.
enzyme
cellulose
amino acid
glycerol
23
Which of these is NOT made up of proteins?
enzymes
hair
cellulose
fingernails
24
Water and a sponge would not be effective in cleaning up a grease spill because...
Water is polar and will not attract the non-polar grease.
Water and grease are both polar and will repel each other.
Water is polar and will attract the non-polar grease.
Water is non-polar and will attract the polar grease.
25
How many electrons are held in the first energy level of atoms?
eight
two
one
eighteen
26
Which of the following will form a solution?
oil and water
salt and sand
sand and water
salt and water
27
The only element that has NO neutrons is...
nitrogen
hydrogen
carbon
phosphorous
28
A covalent bond involves sharing of _______.
electrons
elements
neutrons
protons
29
______ are the main components of the
membranes
that surround all living cells.
Proteins
Nucleic Acids
Lipids
Carbohydrates
30
The process of water being removed from polymers.
evaporation
condensation
hydrolysis
melting
31
A bond that is important in organisms because it holds large molecules, like proteins, together
hydrogen bond
double bond
ionic bond
covalent bond
