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25/11/2024 09:27AM
BIOC 201 Test 1 Questions and Answers
Why do fat droplets in a system of water eventually come together to form one fat droplet? -
Answers✓✓nonpolar spontaneously interacts with nonpolar via *hydrophobic interaction*
Why do fat droplets in a system of water come together, because isn't entropy supposed to
increase? - Answers✓✓1. fats are (kind of) repelled by water
2. fats altogether have lower surface area
3. ice-like water around each fat droplet increases in disorder
Do lipids combine together? - Answers✓✓no
Are C-H, C-C bonds polar or nonpolar - Answers✓✓nonpolar
trace elements - Answers✓✓elements required by organism in smallest quantities
valence - Answers✓✓atom's bonding capacity (number of unpaired electrons, number of
covalent bonds atom can form to complete shell)
What is the strength of ionic bonds in aqueous phase? - Answers✓✓weak
What are the four emergent properties of water for life? - Answers✓✓1. cohesion
2. moderation of temperature
3. higher density of water than ice
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25/11/2024 09:27AM
4. Universal solvent
surface tension - Answers✓✓measure of how difficult it is to stretch/break surface of liquid
evaporative cooling - Answers✓✓as liquid evaporates, surface of liquid that remains behind
cools down
Why is water more dense than ice? - Answers✓✓H bonding in ice keeps molecules *apart*,
lack of speed prevents them from breaking H bonds, leaving them in a lattice
What are two qualities of hydrophobic substances? - Answers✓✓nonionic and nonpolar
What are common ingredients of organic molecules? - Answers✓✓*C*, H, O, N, (S, P)
What did Miller and Urey conclude? - Answers✓✓complex organic molecules arise
spontaneously under conditions of early Earth
hydrocarbon - Answers✓✓organic molecule containing only carbon and hydrogen
Where are hydrocarbons found? - Answers✓✓petroleum, tails of fats
isomers - Answers✓✓compounds with same literal formula, but different structure
structural isomers - Answers✓✓differ in covalent arrangement of atoms
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25/11/2024 09:27AM
cis-trans isomers - Answers✓✓carbons have covalent bonds to same atoms, but atoms differ in
spatial arrangement
enantiomers - Answers✓✓isomers that are mirror images of each other
asymmetric carbon - Answers✓✓carbon attached to 4+ different atoms
functional group - Answers✓✓chemical group involved in chemical rxns directly
hydroxyl group - Answers✓✓polar, *alcohol*
carbonyl group - Answers✓✓*aldehydes*, *ketones*
carboxyl group - Answers✓✓carboxylic *acid*
amino group - Answers✓✓*amine*
sulfhydryl group - Answers✓✓*thiols*
phosphate group - Answers✓✓(organic phosphate)
methyl group - Answers✓✓(methylated compound)
macromolecules - Answers✓✓huge carbohydrates, proteins, or nucleic acids
, ©Themoon EXAM SOLUTIONS
25/11/2024 09:27AM
polymer - Answers✓✓long chain of identical monomers in carbohydrates, proteins, and nucleic
acids
What happens when 5 or 6 carbon sugars are in aqueous solutions? - Answers✓✓they form
rings
glycosodic linkage - Answers✓✓formation of disaccharide by dehydration synthesis between
first and fourth carbon of respective sugars
how do plants and muscles store polysaccharides? - Answers✓✓starch, glycogen
Difference between alpha and beta glucose? - Answers✓✓orientation of H and OH upon the
first carbon is flipped
Difference between alpha and beta linkage? - Answers✓✓starch, cellulose
chitin - Answers✓✓structural polysaccharide in arthropods and fungi
lipids - Answers✓✓nonpolymers and hydrophobic molecules
triglyceride - Answers✓✓glycerol + 3 fatty acids
fatty acid - Answers✓✓16-18 carbons in length (carboxyl group makes it a fatty acid)
25/11/2024 09:27AM
BIOC 201 Test 1 Questions and Answers
Why do fat droplets in a system of water eventually come together to form one fat droplet? -
Answers✓✓nonpolar spontaneously interacts with nonpolar via *hydrophobic interaction*
Why do fat droplets in a system of water come together, because isn't entropy supposed to
increase? - Answers✓✓1. fats are (kind of) repelled by water
2. fats altogether have lower surface area
3. ice-like water around each fat droplet increases in disorder
Do lipids combine together? - Answers✓✓no
Are C-H, C-C bonds polar or nonpolar - Answers✓✓nonpolar
trace elements - Answers✓✓elements required by organism in smallest quantities
valence - Answers✓✓atom's bonding capacity (number of unpaired electrons, number of
covalent bonds atom can form to complete shell)
What is the strength of ionic bonds in aqueous phase? - Answers✓✓weak
What are the four emergent properties of water for life? - Answers✓✓1. cohesion
2. moderation of temperature
3. higher density of water than ice
, ©Themoon EXAM SOLUTIONS
25/11/2024 09:27AM
4. Universal solvent
surface tension - Answers✓✓measure of how difficult it is to stretch/break surface of liquid
evaporative cooling - Answers✓✓as liquid evaporates, surface of liquid that remains behind
cools down
Why is water more dense than ice? - Answers✓✓H bonding in ice keeps molecules *apart*,
lack of speed prevents them from breaking H bonds, leaving them in a lattice
What are two qualities of hydrophobic substances? - Answers✓✓nonionic and nonpolar
What are common ingredients of organic molecules? - Answers✓✓*C*, H, O, N, (S, P)
What did Miller and Urey conclude? - Answers✓✓complex organic molecules arise
spontaneously under conditions of early Earth
hydrocarbon - Answers✓✓organic molecule containing only carbon and hydrogen
Where are hydrocarbons found? - Answers✓✓petroleum, tails of fats
isomers - Answers✓✓compounds with same literal formula, but different structure
structural isomers - Answers✓✓differ in covalent arrangement of atoms
, ©Themoon EXAM SOLUTIONS
25/11/2024 09:27AM
cis-trans isomers - Answers✓✓carbons have covalent bonds to same atoms, but atoms differ in
spatial arrangement
enantiomers - Answers✓✓isomers that are mirror images of each other
asymmetric carbon - Answers✓✓carbon attached to 4+ different atoms
functional group - Answers✓✓chemical group involved in chemical rxns directly
hydroxyl group - Answers✓✓polar, *alcohol*
carbonyl group - Answers✓✓*aldehydes*, *ketones*
carboxyl group - Answers✓✓carboxylic *acid*
amino group - Answers✓✓*amine*
sulfhydryl group - Answers✓✓*thiols*
phosphate group - Answers✓✓(organic phosphate)
methyl group - Answers✓✓(methylated compound)
macromolecules - Answers✓✓huge carbohydrates, proteins, or nucleic acids
, ©Themoon EXAM SOLUTIONS
25/11/2024 09:27AM
polymer - Answers✓✓long chain of identical monomers in carbohydrates, proteins, and nucleic
acids
What happens when 5 or 6 carbon sugars are in aqueous solutions? - Answers✓✓they form
rings
glycosodic linkage - Answers✓✓formation of disaccharide by dehydration synthesis between
first and fourth carbon of respective sugars
how do plants and muscles store polysaccharides? - Answers✓✓starch, glycogen
Difference between alpha and beta glucose? - Answers✓✓orientation of H and OH upon the
first carbon is flipped
Difference between alpha and beta linkage? - Answers✓✓starch, cellulose
chitin - Answers✓✓structural polysaccharide in arthropods and fungi
lipids - Answers✓✓nonpolymers and hydrophobic molecules
triglyceride - Answers✓✓glycerol + 3 fatty acids
fatty acid - Answers✓✓16-18 carbons in length (carboxyl group makes it a fatty acid)
