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BIOLOGY Chapter 2 - The Chemistry of Life Flashcards | StudBud
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BIOLOGY Chapter 2 - The Chemistry of Life
BIOLOGY Chapter 2 - The Chemistry of Life
20 terms
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An #introduction to the basics of chemistry for #biology students.
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
Proteins are polymers formed from _________________.
lipids
nucleic acids
amino acids
carbohydrates
2
If a reaction in one direction RELEASES energy, the same reaction in the other direction ______
destroys energy
cannot occur
requires energy
also releases energy
3
The major functions of proteins in cells do NOT include _________________
transporting substances
storing energy
controlling reactions
regulating cell processes
4
The positively charges particle in an atom is called the _____________.
electron
neutron
proton
ion
5
The group of macromolecules tha stores and transmits genetic information is ______________.
lipids
nucleic acids
proteins
carbohydrates
6
Acids _____________
have a pH of 0
have a pH of 7
have a pH below 7
have a pH below 7
7
Isotopes of an element contain ____________
equal numbers of protons and neutrons
the same number of protons and different number of electrons
the same number of neutrons and different number of protons
the same number of protons but different number of neutrons
8
All atoms of the same element contain the same number of ______________.
neutrons and protons
neutrons
protons
neutrons and electrons
9
The elements or compounds formed by chemical reactions are _________________.
the gases
the products
the reactants
the solids
10
What two subatomic particles form the nucleus of an atom?
protons and electrons
isotopes and neutrons
isotopes and electrons
protons and neutrons
11
An attraction between the hydrogen on a water molecule and the oxygen on another molecule.
hydrogen bond
covalent bond
polar bond
ionic bond
12
Chemical reactions that absorb energy
will not occur without a source of energy
always require catalysts
often occur spontaneously
are often explosive
13
When you shake sugar and sand together in a test tube, you cause them to form a __________.
mixture
compound
suspension
solution
14
Ionic bonds form when __________.
electrons are shared equally between two atoms.
electrons are transferred from one atom to another.
electrons are shared unequally between two atoms
there are attractions bet opp charged areas of molecules.
15
A group of macromolecules that serves as the main source of energy for living things is ______.
carbohydrates
lipids
nucleic acids
proteins
16
An enzyme speeds up a reaction by ________________.
raising the activation energy
releasing energy
lowering the activation energy
absorbing energy
17
As an analogy, the monomers in a polymer are like the ________________.
electrons in an atom
links in a chain
bonds in a molecule
solvent in a solution
18
Nucleotides consist of a phosphate group, a nitrogenous base, and a ________________.
lipid
fatty acid
6-carbon sugar
5-carbon carbon sugar
19
Proteins and carbohydrates are similar in that both
are monomers containing carbon, hydrogen and oxygen
are monomers containing carbon, hydrogen, and nitrogen
are polymers containing carbon, hydrogen and oxygen
are polymers containing carbon, hydrogen and nitrogen
20
Which of the following can affect the activity of enzymes?
pH
regulatory molecules
temperature
all of the above
