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Final Prep New Stuff
Stuff for the final
115
Chemistry
Undergraduate 1
04/15/2009

Additional Chemistry Flashcards

 


 

Cards

Term
When cyclobutene is burned in the presence of oxygen, what are the products?
Definition
"CO2 and H20"
Term
"An unknown compound may be heptane, 3-mehtylcyclohexene, or 2-heptene. If the red color of a bromine solution dissapears when it is added, the unknown may be: "
Definition
"2-heptene or 3-methylcyclohexene"
Term
"The hydrogenation of an alkene gives"
Definition
"An alkane"
Term
Metabolism
Definition
all chemical reactions that provide energy & substances required for cell growth
Term
What are the two types of metabolism?
Definition
Catabolism and anabolism
Term
Catabolism
Definition
Breaks down large molecules into smaller ones. Releases energy.
Term
Anabolism
Definition
Builds large molecules out of small ones
Term
What stage of metabolism involves the digestion of polysaccharides? (pp 22.1)
Definition
glycolysis
Term
What is meant by a catabolic reaction in metabolism? (pp 22.2)
Definition
That large molecules will be broken down into smaller ones. (As in food digestion)
Term
What is ATP composed of?
Definition
the nitrogen base adenine, a ribose sugar, and 3 phosphate groups
Term
What is ATP composed of?
Definition
an adenine base, ribose sugar, and 3 phosphate groups
Term
What is the role of ATP in the body?
Definition
Provides energy
Term
What is a coupled reaction? (What two kinds of reactions make one up?)
Definition
A combination of an energy-requiring reaction with an energy-producing one
Term
Why is ATP considered a high-energy comppund? (pp 22.7)
Definition
Because it produces 7.3 kcal/mol of energy when hydrolyzed
Term
What reaction does NADH+ participate in?
And what type of bonds does it form?
Definition
Oxidation reactions, forms carbon/oxygen double bonds
Term
What happens in an oxidation reaction?
Definition
A loss of Hydrogen/electrons. Caused by addition of oxygen
Term
What occurs in a reduction reaction?
Definition
A gain of hydrogen/electrons. Oxygen is lost.
Term
What vitamin component does NAD+ contain?
Definition
niacin
Term
What is the function of NAD+ as a coenzyme? (Does it undergo oxid or red reactions and what does it produce?)
Definition
Oxidizes to produce carbon/oxygen double bonds
Term
What vitamin component does FAD contain?
Definition
riboflavin (vitamin B)
Term
What does NAD+ oxidize to?
Definition
NADH
Term
What is FAD's function as a coenzyme?
Definition
Accepts Hydrogen from other molecules, produces Carbon/carbon double bonds (C=C)
Term
What does FAD reduce to?
Definition
FADH2
Term
what vitamin does CoA contain?
Definition
pantothenic acid (vitamin B3)
Term
What is CoA's function as a coenzyme
Definition
Activates acyl groups to produce thioesters
Term
Why are thioester bonds important?
Definition
They are energy-rich
Term
What coenzyme (NAD, FAD, CoA) creates carbon/carbon double bonds?
Definition
FAD
Term
What is the general reaction that occurs during carbohydrate reaction? (pp 22.17)
Definition
hydrolysis
Term
What are the functional units of lactose?
Definition
Galactose and glucose
Term
What are the monosaccharides that make up sucrose?
Definition
fructose and glucose
Term
what are the functional units of maltose?
Definition
glucose and glucose
Term
What is the starting molecule of glycolysis?
Definition
glucose
Term
what are the products of glycolysis?
Definition
2 ATP

2 pyruvate

2 NADH

Term
How many carbons does pyruvate contain?
Definition
3
Term
What are the two stages of glycolysis?
Definition

"Energy investing phase" (AKA the part where 2 ATPs are used to make sugar phosphates)

"The energy generating phase" (AKA hydrolysis of sugar phosphates to produce 2 pyruvates, 2 ATP, and 2 NADH.

Term
What happens in "Stage 1" of glycolysis
Definition
2 ATPs are used to attach phosphate groups to glucose, creating sugar phosphates.
Term
What happens in "Stage 2" of glycolysis?
Definition
The sugar phosphates produced in stage one undergo a series of hydrolysis reactions to produce 2 pyruvates, 2 ATPs, and 2 NADH molecules.
Term
What are the three possible pyruvate pathways?
Definition
Fermentation, Lactate production, acetyl CoA production
Term
Which of the pyruvate pathways occur under anaerobic conditions?
Definition
Fermentation and Lactate production
Term
Which of the pyruvate pathways occur under aerobic conditions?
Definition
Acetyl CoA production
Term
What are the products of fermentation?
Definition
ethanol and CO2
Term
What occurs during lactate production?
Definition
pyruvate remains in the cytoplasm and is reduced to lactate.
Term
What is the role of NAD+ in lactate production?
Definition
It is used to oxidize glyceraldehyde to produce a small amount of ATP
Term
What occurs in acetyl CoA production?
Definition
pyruvate moves from the cytoplasm to the matrix to be oxidized.Carbon is removed from pyruvate as CO2, and acetyl CoA is the product
Term
Three enzymes that 'officially' regulate glycolysis
Definition
Hexokinase, phosphofructokinase, pyruvate kinase
Term
Under what conditions is glucagon secreted?
Definition
When blood sugar is low
Term
what is glucagon's effect on glycolysis, and why?
Definition
it inhibits glycolysis, because glycolysis reactions use glucose, and since blood sugar is low when glucagon is secreted, more glucose shouldn't be taken away.
Term
What is glucagon's effect on gluconeogenesis, and why?
Definition
activates, because gluconeogenesis creates glucose, which is needed when glucagon is secreted.
Term
What is glucagon's effect on glycogenolysis and why?
Definition
activates glycogenolysis, because glycogenolysis breaks down stored glycogen to help restore blood glucose levels
Term
What effect does glucagon have on glycogenesis, and why?
Definition
It inhibits it, because glycogenesis pulls glucose out of the bloodstream to start its reactions.
Term
Under what conditions is insulin secreted?
Definition
When blood sugar is high
Term
what effect does insulin have on glycolysis, and why?
Definition
It activates it, because glycolysis stimulates the breakdown of glucose to produce energy
Term
What effect does insulin have on gluconeogenesis and why?
Definition
It inhibits it, because gluconeogenesis FORMS glucose, and if insulin is being secreted, blood glucose is already high
Term
What is insulin's effect on glycogenolysis, and why?
Definition
inhibits it, because glycogenolysis stimulates the hydrolysis of glycogen to form glucose.
Term
what is insulin's effect on
Definition
Term
Which part of the cell does the Cori cycle occur?
Definition
????
Term
Can secondary alcohols be oxidized? If so, what are the products?
Definition
Yes, to ketones
Term
Can primary alcohols be oxidized? If so, what is the product(s)?
Definition
Yes, aldehydes to carboxylic acids
Term
Can tertiary alcohols be oxidized? If so, what is the product(s)?
Definition
No
Term
What is a primary alcohol?
Definition
the the carbon that the -OH is attached to is attached to only one other thing
Term
what is a secondary alcohol?
Definition
when the carbon that the -OH is attached to is attached to two other things (alkyl groups)
Term
What is a tertiary alcohol?
Definition
When the carbon carrying the -OH group is attached to three other alkyl groups
Term
What is the product of the hydration of 1-pentene?
Definition
a secondary alcohol
Term
What carboxylic acid and amine are used to make acetaminophen?
Definition
ethanoic acid and 4-hydroanaline
Term
What is the difference between an ester and and ether?
Definition
An ether doesn't contain an alcohol, and an ester does.
Term
In the presence of an (alkane or alkene), the red color of a Bromine solution disappears.
Definition
alkenes
Term
Parathon binds to the active site of an enzyme. What is it?
Definition
irreversible inhibitor
Term
what is a cofactor that is a small organic molecule?
Definition
coenzyme
Term
What is the difference between an aldehyde and a ketone?
Definition
aldehydes have the double bonded oxygen at the end of the chain, ketones have it inside the chain
Term
which RNA covalently attaches to amino acids?
Definition
tRNA
Term
the products from the saponification of a triacylgylcerol would be
Definition
glycerol and fatty acid salts
Term
What kinda of side chains create salt bridges?
Definition
acidic and a basic
Term
what is the basic structure of an amino acid?
Definition
H2N-CH(R)-C(=O)-OH
Term
Glycogenesis (def)
Definition
Synthesis of glycogen from glucose
Term
When does glycogenesis occur?
Definition
When blood glucose(blood sugar) is high.
Term
What is the enzyme that drives glycogenesis?
Definition
glycogen synthase
Term
What is glycogenolysis?
Definition
The breakdown of glycogen to glucose
Term
What is the main enzyme that drives glycogenolysis?
Definition
glycogen phosphorylate
Term
When does glycogenolysis occur?
Definition
when blood sugar is low/during strenuous exercise
Term
What is gluconeogenesis?
Definition
production of glucose from carbons retrieved from amino acids, lactates, and glycerol.
Term
Where does gluconeogenesis occur?
Definition
The liver
Term
What is the role of gluconeogenesis and why?
Definition
source of glucose after glycogen stores are depeleted, usually during fasting or really heavy exercise.
Term
What are the starting molecules of gluconeogenesis?
Definition
2 Pyruvates and lactate
Term
What is the energy requirement of gluconeogenesis?
Definition
4ATP, 4GTP, and 2NADH
Term
What are bypass reactions and why do they occur?
Definition
Bypass reactions make gluconeogenesis 'energetically favorable' by skipping over the 3 energy-requiring reactions that normally occur during glycolysis
Term
What are the 3 energy-requiring reactions during glycolysis?
Definition
Reactions 1, 3, and 10
Term
What are the hormones that drive the 3 energy-requiring reactions in glycolysis?
Definition

hexokinase (reaction 1)

phosphofructokinase (reaction 3)

pyruvate kinase (reaction 10)

Term
what effect does insulin production have on glycogenesis and why?
Definition
activates it, because glycogenesis takes glucose out of the bloodstream and stores it as glycogen.
Term
Cori cycle and when it occurs
Definition
controls the flow of lactate and glucose between muscles and liver to prevent lactate buildup in muscle. Most active after strenuous exercise
Term
Citric Acid Cycle (def)
Definition
degrades acetyl CoA to yield CO2 and energy to produce NADH+H and FADH2 needed for ATP production in metabolism
Term
Where does the Citric Acid Cycle occur?
Definition
Matrix of the mitochondria
Term
What are the products of the Citric Acid Cycle?
Definition
3 NADH, 1FADH2, 1GTP
Term
How much ATP is produced per Citric Acid Cycle?
Definition
12
Term
Acteyl CoA as entry molecule
Definition
acetyl group from Acetyl CoA bonds to (some thing) to make HS-CoA
Term
Where does oxidative phosphorylation occur?
Definition
Inner membrane of mitochondria
Term
Where do NADH and FADH2 originate from?
Definition
Matrix of mitochondria
Term
What is the final e- acceptor in the e- transport chain?
Definition
Oxygen (from water)
Term
What are the e- carriers? (4)
Definition
FMN, FeS clusters, Coenzyme Q, cytochrome
Term
What complexes undergo proton pumping?
Definition
Complexes I, III, IV
Term
Chemeosmotic model (what and by who)
Definition
Peter Mitchell's model which explains proton pumping and how the proton concentration gradient in the intermembrane space of the mitochondria than in the matrix, creating a concentration gradient. H+ will tavel down the gradient to the matrix, where it helps ATP production
Term
Why is ATP synthase dependent on H+ produced by e- transport chain?
Definition
because it provides energy to make ATP
Term
How much ATP is produced per NADH
Definition
3 ATPs
Term
How much ATP is produced per FADH2?
Definition
2 ATPs
Term
How much ATP is produced from glycolysis?
Definition
6 ATP
(-2 used to activate, +6 for oxidation, -2 for NADH transport, and +4 from phosphorylation)
Term
how much ATP is produced from pyruvate?
Definition
6 ATPs
Term
How many ATPs are produced from ONE Citric acid cycle?
Definition
12
Term
how many citric acid cycles occer per glucose molecule?
Definition
2 (means 24 ATPs produced from CAC for one glucose)
Term
How much ATP does it take to transport NADH to e- chain?
Definition
-2 ATPs
Term
How are triacylgylerols digested?
Definition
They are initially broken down through emulsification by bile salts in small intestine. Then micelles (emulsified triacylglycerols) are hydrolyzed (by pancratic lipase) and are broken down into monoacylglycerols and free fatty acids. These are absorbed into intestinal lining, where they reform and are coated with proteins, creating chylomicrons which are released into bloodstream.
Term
what happens to chylomicrons once they reach the cells?
Definition
They are hydrolyzed into glycerol and free fatty acids and used for energy production
Term
Where are triacylglycerols stored?
Definition
adipose tissue
Term
fat mobilization
Definition
breaks down stored triacylglycerols into fatty acids and glycerol
Term
Three steps of fatty acid breakdown
Definition

Activation: Coenzyme A, energy required

Transport: by carnitine

Β-oxidation: products of 1 cycle

Term
how do you calculate how many acetyl CoAs are produced from a given fatty acid?
Definition
take number of carbons in fatty acid chain, and divide by 2
Term
how do you calculate the number of cycles needed to breakdown a given fatty acid?
Definition
take how many carbons are in chain, divide by 2, subract 1
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