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BIO 141 Exam 1
BIO 141 Exam 1
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Dr. Hardcastle's BIO Exam 1
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45 Terms
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1
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Which is not an example of emergent property?
A.) the heart pumping blood through the body
B.) cities
C.) organ systems
D.) organisms cells
Organisms cells
2
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What organelle is only found in plants?
Central vacuole
3
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What is stored in central vacuoles?
Anthocyanin pigments, water, and crystals
4
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What is biology?
The study of life
5
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How many elements are essential to life?
25
6
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What is hydrogen bonding?
1\.) a type of bond holding water molecules together
2\.) hydrogen bonded to either nitrogen, oxygen, or fluorine
3\.) a weak bond
7
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Mass number is…
protons + neutrons
8
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Which is not an isotope of hydrogen?
A.) hydrogen
B.) deuterium
C.) tritium
D.) H-13
H-13
9
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What is covalent bonding?
Sharing of electrons between two atoms
10
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What percent of cells are made up of water?
70-95%
11
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What is tetravalency?
4 valence electrons, the ability to form 4 bonds
12
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What are the emergent properties of water?
cohesion/adhesion, moderation of temperatures, insulation of bodies of water by floating ice, solvent of life
13
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What happens in the bicarbonate buffer system when H+ ions are added to the system?
rxn shifts to the left and the bicarbonate ion accepts more H+
14
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Name the functional group
hydroxyl
15
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Name the functional group
carboxyl
16
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what are macromolecules?
large molecules essential for life
17
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17 T/F: Carbohydrates, proteins, lipids, and nucleic acids are macromolecules?
17 True
18
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What type of bond is a glycosidic linkage?
covalent bonds
19
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what is the primary function of cellulose?
cell wall structural support
20
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what is dehydration synthesis?
removing a water molecule to bind two molecules together
21
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What is the main function group present in carbohydrates?
carbonyl
22
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identify this structures primary function
plant food storage
23
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what type of structure is this protein displaying?
tertiary
24
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T/F denaturing a protein is reversible.
False
25
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Is this structure purine or pyrimidine?
purine
26
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what is unique about this structure?
A.) it contains 3 fatty acids
B.) it forms hydrogen bonds
C.) found in hormones
D.) it is an amphipathic molecule
it is an amphipathic molecule
27
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what type of microscope produces a 3-D image?
scanning electron microscope
28
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T/F Hypothesis are concrete (non-changeable) answers to questions.
false
29
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what electrons are most important in creating chemical bonds?
valence electrons
30
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what does chemical equilibrium mean? (two answers)
A.) the reaction is balanced
B.) the amount of reactants and products are always equal
C.) the rates of both the forward and backward rxn are equal
D.) the chemicals are the same in both the reactants and products
the amount of reactants and products are always equal, and the rates of both the forward and backward rxn are equal.
31
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what type of microscope is used most often in lab?
light microscope
32
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why do humans sweat and dogs pant to cool themselves on hot days?
the warmest molecules turn to gas first and lowers body temperature.
33
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which is not found in prokaryotic cells (two choices)
A.) nucleus
B.) DNA
C.) cell membrane
D.) endoplasmic reticulum
nucleus, endoplasmic reticulum
34
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Function of nucleolus
ribosome synthesis
35
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How does DNA spend 95% of its time in the nucleus?
A.) chromatin (relaxed state)
B.) supercoiled/ condensed
chromatin (relaxed state)
36
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Which is not a function of central vacuoles?
A.) storage
B.) support
C.) metabolism
D.) transportation
transportation
37
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Why do organisms enter endosymbiotic relationships?
both organisms benefit from it
38
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What process does mitochondria go through?
Cellular respiration
39
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What is the function of chloroplast?
photosynthesis
40
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How many separate sets of genes do plants have?
3 sets
41
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How many sets of genes do animals have?
2 sets
42
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What is the cytoskeleton?
fibers running through the cytoplasm
43
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Wat is the function of microtubules during cell division?
Make spindle fibers that pull chromosomes apart
44
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What protein makes microfilaments?
A.) actin
B.) tubulin
actin
45
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How do plant cell walls stick to each other?
middle lamella
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