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Bio161 Exam 1 Flashcards | StudBud
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Bio161 Exam 1
Bio161 Exam 1
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1
What is an isomer that has different spacial arrangements around double bonds (cis and trans)
enantiomer
sterioisomer
structural
geometric
2
what is cohesion?
attraction between water molecules and other substances
attraction between sulfur molecules
attraction between carbon molecules
attraction between water molecules
3
weak bonds are essential because they require less energy to make and break during common reactions
True
False
4
Which Functional Group is Basic?
Hydroxyl Group
Sulfhydryl Group
Methyl Group
Amino Group
5
what is the study of carbon containing compounds?
Organic Chemistry
Physical chemistry
Chemical dynamics
Analytical Chemistry
6
What is the flow of genetic information
Protein, DNA, RNA
DNA, RNA, Protein
Transcription, Protein, RNA
RNA, Protein, DNA
7
How are polar covalent bonds and hydrogen (H) bonds related?
H only bonds to highly electronegative compounds
H bonds form w a polar molecule when H bonded to an electrostatic molecule
polar bonds and H bonds are the same
8
How is a 1M solution formed using the molecular formula?
multipy grams of substance by molecular weght and divide by 1 liter
molecular formula divided by grams
molecular formula multiplied by liters
liters divided by moles
9
Enantiomers and Sterioisomers have...
different covalent bond arrangements
different spacial arrangements
the same covalent structure, but different 3D structure
10
changes in a species due to favorable genetic traits
descent with modification
Artificial selection
adaptation
Natural selection
11
Polar covalent bonds share electrons equally, non polar covalent bonds do not
False
True
12
Chemical reactions are the making and breaking of bonds?
False
True
13
What do eukaryotic cells have that prokaryotic cells don't
nucleus
membrane bound organelles
DNA
cell wall
14
[H+] is the -log of pH
False
True
15
What is biology
the study of fish
the study of evolution
the study of life
the study of organic molecules
16
If the [H+] is 10^-5, then what is the [OH-]?
10^-14
10^-7
10^-9
10^-5
17
Natural selection is selective breeding to produce a desired trait
True
False
18
Significance of Stanley Miller's Experiment
showed abiotic synthesis of organic compounds that mimicked early Earth
formed inorganic compounds
simulated Earth's future conditions
19
what are the 4 elements that make up 96% of living matter?
C, O, H, N
Na, S, C, O
C, N, F, Li
Mg, S, Br, H
20
What are the 3 domains of life?
Prokarya, plants, animals
Eukarya, bacteria, archaea
Protists, prokarya, archaea
Archaea, plants, eukarya
21
Adhesion is the attraction between water and other substances
False
True
22
Difference between Hydrogen bonds and Van der Waals interactions
van der waals are strong, hydrogen bonds are weak
van der waals happen between all molecules, hydrogen bonds only bonds w H
Hydrogen bonds are between polar molecules, van der waals are temporary
23
What levels make up biological organization
Biosphere ecosystem community pop organism organ tissue cell mol organelle
neutrons, protons, electrons
Order, Reproduction, Adaptation, Regulation, Growth, Response, Energy Prcs
24
the idea that species changes over time
descent with modification
natural selection
artificial selection
adaptation
25
Why are hydrocarbons insoluble in water (hydrophobic)?
they just don't like water
they are polar
water is non polar
they are non polar
26
An isomer that has different covalent bond arrangements is a...
geometric isomer
Enantiomer
structural isomer
Sterioisomer
27
Solid water (Ice) is less dense than liquid water because hydrogen bonds don't break and create space between molecules
False
True
28
Bicarbonate acts as a buffer by neutralizing compounds and resisting pH changes
True
False
29
Why can carbon form large complex atoms?
it has 4 valence electrons that can each form a different covalent bond
it is the best element
can only bond with itself
doesn't form bonds well
30
Isotopes have a DIFFERENT number of protons, but the SAME number of neutrons
False
True
31
What happens to ions in water?
water strengthens the ionic bonds
they bond with water
repel each water
water breaks the ionic bonds
32
Choose the option that shows the types of bonds ordered from strongest to weakest
ionic, covalent, hydrogen
covalent, ionic, hydrogen
covalent, hydrogen, ionic
hydrogen, ionic, covalent
33
hydrogen bonds break when heat/ kinetic energy in the system increases
False
True
34
How can water molecules can form bonds with up to 4 OTHER water molecules?
they don't
oxygen bonds with 4 other oxygen
hydrogens bond with 2 other hydrogens
Oxygen (O) can form bonds with 2 OTHER Hydrogen (H) each H can bond w/ 1 O
35
How is molecular weight found based on molecular formula?
Adding the number of molecules together
Mutliplying all the masses together
they are the same
multply the # of elements by their weight and adding the masses together
36
Which functional groups are acidic?
Hydroxyl and sulfhydryl groups
Carboxyl and Phosphate groups
Methyl and Carboxyl Groups
Amino and Carbonyl Groups
37
Which organisms are related the closest?
Lungfishes and Mammals
Amphibians and Hawks
Ostriches and Hawks
Lizards and Crocodiles
