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Bio120
Bio120
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A #biology review for #macromolecules and other #basics in bio
Flashcards
27 cards
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Practice quiz
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Questions
27
Answers
1
Stanley Miller's experiments were significant because he demonstrated that __________.
organic molecules can be synthesized only by living organism
no molecules synthesized originated in volcanic gas
organic compounds can be spontaneously synthesized
urea could be synthesized from entirely natural salts
2
A testable explanation for a set of observations based on the available data is ____?
scientific method
hypothesis
question
theory
3
What is ATP's importance in the cell?
important component of cell membranes
ATP can add phosphate groups
ATP stores energy in carbonyl groups
ATP stores potential energy, which can be released work
4
what information does the atomic number give you?
the number of protons
the number of neutrons
the number of neutrons and protons
the number of valence electrons
5
In what type of bond do atoms share electrons equally?
hydrogen bonds
ionic bonds
polar covalent bonds
non polar covalent bonds
6
On the pH scale, what pH does an acidic solution have?
0-14
0-6
8-14
1-7
7
which cell contains membrane enclosed organelles?
prokaryotic
eukaryotic
8
Which of the following is an organic molecule?
O2
Ne
NaCl
CH4
9
what type of cell is shown?
prokaryotic
eukaryotic
10
one or more communities and the physical environment around them
community
ecosystem
population
environment
11
A hypothesis is the more narrow scope of a ____?
research method
hippopotamus
question
theory
12
A group of individuals of the same species that live in the same area
community
college
ecosystem
population
13
On the pH scale, what pH does a basic solution have?
8-14
1-7
0-14
0-6
14
How many valence electrons does sodium have?
6
2
1
4
15
what type of cell is shown?
prokaryotic
eukaryotic
16
What type of bond is shown?
non polar covalent bond
polar covalent bond
hydrogen bond
ionic bond
17
an organisms adaptation to its environment is the result of ____?
natural selection
memory
evolution
time
18
in what type of bond do electrons transfer from one atom to another? (hint: its charged!)
non polar covalent bonds
ionic bonds
polar covalent bonds
hydrogen bonds
19
Which of these is found in all amino acids?
COH
both —COOH and —NH
-NH2
-COOH
20
A long molecule formed by many identical building blocks linked by covalent bonds is a:
monomer
polymer
hydroxyl
carboxyl
21
Usually companies sell single-enantiomer drugs. Why might it be important to use only one form?
It is not important. Both enantiomers will be effective.
left-handed version is always the effective one.
One provides an effective treatment, the other may be toxic
It is cheaper to manufacture only one of the enantiomers.
22
Which one is NOT a property of water?
surface tension
acidic
adhesion
cohesion
23
In what type of bonds do atoms NOT share electrons equally?
hydrogen bonds
polar covalent bonds
ionic bonds
non polar covalent bonds
24
According to the pH scale, what pH does a neutral solution have?
0-6
7
8-14
0-14
25
What information does the atomic mass give you?
number of protons
number of protons and neutrons
number of protons and electrons
your weight
26
Water is a polar molecule. What does this statement mean?
atoms have partial charges b/c unequal sharing of electrons
that water molecules are linear, like a pole
that water is one of the many hydrophobic molecules
that the atoms in water have equal electronegativities
27
All the organisms that inhabit a specific area
community
ecosystem
environment
population
