bacteria
single celled, no nucleus
can be seen from microscopes
either a parasite or live independently.
basic shapes include spiral, coccus and bacillus. Bacteria multiply themselves by cell division (binary fission).
Antibiotics can usually kill them.
An example of bacteria is meningitis and pneumonia.
digestive, absorptive photosynthetic , chemosynthetic
fungi
eukarytoic, ,spore producing organism, can be seen with microscope
and can live as single celled yeast or as a larger multi-cellular mold. It will reproduce by by decaying matter.. It will live by absorbing certain nutrients from any organic matter. Fungi include molds, mildews, mushrooms and yeasts. Fungi can cause disease in immune suppressed people, such as jock itch and ringworm. Penicillin is made from a fungus
Viruses
microscopically small and are the simplest microbiological entity. A virus is not an independent living organism and needs a host cell to replicate. They are sub-microscopic parasitic particles of nucleic acid (RNA or DNA) that are wrapped in protein. Viruses are immune to antibiotics and are spread in the air or by direct contact. They can lead to serious or sometimes deadly diseases, such as AIDS.
Protozoa
single celled organism with nucleus
which is able to move (motitlity)
feed on any organic compound of carbon and nitrogen, for example an amoeba. They can be parasites or live independently. They are usually found in water or soil. Protozoa have different shapes and will produce asexually. They can inhabit the human body as a parasite, for example in the large intestine
engulf and digest other cells internaly
Algae
eukarytoic, unicellular photosynthetic organisms of a group which live mostly in water. they reproduce asexually by photosynthesis
what are microbes
a microorganism, especially a bacterium causing disease or fermentation
ex: viruses, bacteria, fungi, protozoa, algae
what are the 3 domains
bacteria
archaea
eucarya
how are microbes imp to the health of the planet
other life cannot exist without microbes
impact on food, recycling, biotechnology
what is the composition of an atom
smallest unit of matter
consist of tiny nucleus with moving electrons
nucleus contains protons with positive charge, equal to the magnitude of electron with a neg charge.
Nucleus also contains neutrons with same mass but neutral charge (no charge)
how do atoms differ
the difference in protons numbers identifies each atom
they can differ with isotopes or atomic mass also
what is involved in chemical reaction
atoms or molecules coming together in a collision
and
transfer or sharing of electrons
what is octet rule
The octet rule states that elements gain or lose electrons to attain an electron configuration of the nearest noble gas.(8 in outer/valence shell)
2 first shell of nucleus
then 8, 8,
how do chemical reactions occur
collision between molecules and energy
how do you speed up chemical reaction
increase temperature,
lowering rate of volume,
using a catalyst
pressure of gas increases
concentration of particles increased (shrink container)
solid reactants are broken into smaller pieces
difference between organic and inorganic
organic: molecule with carbon, also has carbohydrate, protein, lipid and nucleic acid
Inorganic: moleucle without carbon, has water ,Co2, nitrogen, sulfur
different kinds of bonds, .. order of strenghts
1. covalent bond (strogest)
2. ionic bond (strong)
3. hydrogen bond (weak)
4. hydrophobic bond (weaker)
5. van der wals forces (only when 2 atoms are very very close)
what bonds occur between (hydrogen and oxygen in H2O) (NA+,and CL- in NaCL,) H2 gas?
Hydrogen and oxygen in water ( polar covalent bond)
NA+ and CL- in NAcl - Ionic bond
H2 gas- covalent
function of protein
part of cellular structure, enzyme, direct chemical reactions
what determines function of protein
3D shape from folding due to amino acid sequence.
function of lipid
storing energy (ex gylcerides)
(energy is stored in chemical bonds, carbs, protein, fats are converted to triglycerides and stored in adipose)
phosopholipids make up the cell membrane of cells
what are lipids
(fats) non polar hydrophobic and insoluble in polar solvents such as water
types of lipids
glycerides, saturated, unsaturated, triglycerides
function of carbohydrates
provide energy for body (especially brain and nervous system)
An enzyme called amylase helps break down carbohydrates into glucose (blood sugar), which is used for energy by the body.
what breaks down carbohydrates to glucose?
enzyme called amylase
function of nucleic acid
make genetic information in living things,
consist of DNA and RNA
The main function is to store and transmit genetic information and use that information to direct the synthesis of new protein.
subunits of protein, lipid, carbohydrate, nucleic acid
amino acid, fatty acid, monosaccharides, nucleotides
how is DNA structuraly different from RNA
DNA is double stranded, has sugar deoxyribose, has the bases adenine, thymine, guanine, cytosine
RNA is single stranded, has sugar ribose, has adenine, uracil, guanine, cytosine
why is water so crucial for life?
is the best solvent, its a polar molecule,temperature stabilizing effects, heat capacity, surface tension, ice floats
what are the key differences in composition between the different bacterial cell wall types
Cell wall of Algae - cellulose
Cell wall of Fungi - chitin
cell wall of bacteria - polydoglycan
cell wall of archaea - lack polydoglycan
main difference between eukaryotes and prokaryotes
prokaryotes do not have nucleus, mitochondria or any cell bound membrane
Eukaryotes do...
How can archaea be distinguished from eubacteria?
archaea are found in extreme enviornemnts like volacono, lava places, have lipid membrane, no fatty acid layer, cell wall-pseudopeptidoglycan (nonpeptidoglycan)
what are the main organelles in eukaryotes and their function
cell wall-ridig external coat
cell membrane - encloses cytoplasms of cell
nucleus-holds genetic codes
ER and ribosomes - protein synthesis
Golgi- modifying, packaging, transport of protein
cholorplast - contains chlorphyll in plants to carry out photosynthesis
mitochondria- generates most cells energy
plastid- pigment that stores starch
what are the main organelles of prokaryotes and their function
ribosome- protein synthesis
inclusion-produce and store stuff
plasmid-small circular double stranded DNA and protein
fimbraie/pillus-
chromosome
cell wall-peptidoglycan
capsule/slime layer-protect orgnaisms from entering
flagellum- tail for swimmin/motility
cytoplasm-gel liquid
nuceleoid region-has plasmid/no nucleus
NO ER, NO GOLGI
difference between spores and endospores
endospores are from bacterial group. they dormant(inactive), tough and non reproductive structure,live in soil and water where they can survive for longer period,they ensure the survival of bacteria during environmental stress, present in gram-positive bacteria, heat resistant
spores are eukaryotes, survive in unfavorable conditions for extended periods of time, considered life cycle of plants and algae
one cell makes one spore
external structures of bacterial cell wall
glyococalyx-slime or capsule ( for attachment or slip away from phagocytes)
flagella- movevemnt
fimbrai/pilli - attachment in mucous of another cell
what is diffusion
movement of solutes or molecules from higher concentration to low concentration
ex; simple or facilitated
osmosis
diffusion of water molecules from low to high concentration
how are molecules transported across the cell membrane
by active transport(atp needed) or facilitated diffusion(no atp)
facilated diffusion
no energy or ATP needed, use channel protein carrier, selective passage
active transport
ATP needed, against concentration gradient
what are enzymes
proteins, (few with RNA and proteins) ( some has only RNA)
what are pathways
multistep reactions
basic properties of enzymes
speed up reactions
not consumed in reactions/reausable
very specific becoz of shape
how do enzymes affect chemical reactions
enzymes are catalysts. Catalysts help reactions occur more quickly (increase rate of reactions), or at unfavorable conditions (wrong pH, wrong temperature)
or lower the activation energy for a reaction. Catalysts are not consumed by the reaction, so are free to continue catalyzing
KEY WORD : catalysts, lowers activation energy for reaction, imp in 3D shape
factors that influence enzyme activity
1. shape: temp, ph, ionic condition, absense of inhibitor, water, chemical modification
2. collision rate: temp, concentration of reactants and enzymes
what can you adjust in enzyme activity
only inhibitors and chemical modification.. everything else stays the same
what determines the specificity of enzymes
structure (lock and key mechanism)
where the substrate (this substance the enzyme acts on) is the lock and the enzyme is the key.
so only the enzymes with the structure that fits perfectly into the substrate can act on the substrate.
hence specific enzymes act on specific substrates.
competitive and noncompetitive inhibitors
competitive: bind to same site as substrate (compete for binding), no reaction because it is stuck to site
noncompetitive: changes shape of active site by binding to other side (allosteric site)
result in nihitibion reaction only for noncompetitive
what happens during denaturation
the 3-D structure of protein get disturb or get opened (uncoil) by breaking of hydrogen bonds. happens during heat
KEY-looses shape
what are the conditions that can cause denaturation of proteins
heat
ion concentration (ph)
water concentration (low)
chemical alterations(bonding breaks)
what is the universsal energy molecule of the cell
ATP (adenosine tri phosphate)
what is the role of oxygen in fermentation, aeorbic respiration, anerobic respiration?
see notebook
what is the final chemical product after the breakdown of glucose during respiration, fermentation
Fermentation - 2 ATP from one glucose
Respiration - 36 ATP from one glucose
which part of respiration, fermentation, produces carbon dioxide?
Carbon dioxide is released during two phases of cellular respiration. The first phase that carbon dioxide leaves is during pyruvate decarboxylation. The second time CO2 is released is during the Kreb's cycle. 1 CO2 leaves during the decarboxylation and two leave during the Kreb's cycle. Since there are two pyruvate per glucose molecule, everything happens twice. This makes a total of 6 CO2 released per glucose molecule.
what is required to carry out glycolysis, making of fermentation products, krebs cycle, etc
glucose
Glycolysis
1-Glycolysis is part of both aerobic and anaerobic respiration.
2-Glycolysis splits glucose, a six-carbon compound, into two pyruvate molecules, each of which has three carbons.
3-In glycolysis, a 2 ATP investment results in a 4 ATP payoff.
4-Unlike the rest of aerobic respiration, which takes place in the mitochondria, glycolysis takes place in the cytoplasm of the cell.
5-Unlike the rest of aerobic respiration, glycolysis does not require oxygen
Glycolysis - C6H12O6 + 2ATP + 2NAD+2pyruvate + 4ATP + 2NADH
Kreb's cycle
1-The Krebs cycle results in 2 ATP molecules for each glucose molecule run through glycolysis.
2-The Krebs cycle sends energy-laden NADH and FADH2 molecules on to the next step in respiration, the electron transport chain. It does not export carbon molecules for further processing.
-The Krebs cycle takes place in the mitochondrial matrix, the innermost compartment of the mitochondria.
4-Though the Krebs cycle does not directly require oxygen, it can only take place when oxygen is present because it relies on by-products from the electron transport chain, which requires oxygen.
5-The Krebs cycle is therefore an aerobic process
Krebs cycle: 2acetyl-CoA + 2oxaloacetate4CO2 + 6NADH + 2FADH2 + 2ATP + 2oxaloacetate
electron transport chain
1-Four ATP molecules are produced by glycolysis and the Krebs cycle combined. The electron transport chain produces 34 ATP.
2-The electron transport chain occurs across the inner membrane of the mitochondria.
3-The electron transport chain requires oxygen.
ETC: 10NADH + 2FADH234ATP
lactic acid ferementation
Lactic acid fermentation is common in fungi and bacteria. Lactic acid fermentation also takes place in human muscle cells when strenuous exercise causes temporary oxygen shortages.
pyruvate + NADHlactic acid + NAD+
alcohol fermentation
Alcoholic fermentation is the source of ethyl alcohol present in wines and liquors. It also accounts for the bubbles in bread. When yeast in bread dough runs out of oxygen, it goes through alcoholic fermentation, producing carbon dioxide. These carbon dioxide bubbles create spaces in the dough and cause it to rise.
pyruvate + NADHethyl alcohol + NAD+ + CO2
In aerobic respiration carbohydrates are ultimately broken down into:
carbon dioxide (co2)
Most ATP in eukaryotic cells is produced in the:
Mitochondria
Most ATP produced in aerobic respiration occurs in the process of:
chemiosmosis
In aerobic respiration, the energy in 1 mole of glucose is capable of producing how many ATP molecules:
38 x (6.02 x 1023) molecules of ATP
products of glycolysis include
pyruvate, NADH, ATP
In glycolysis the most reduced compound formed is:
Pyruvate
In glycolysis, the activation of glucose is accomplished by:
ATP
Products of the Krebs cycle include:
carbon dioxide, NADH, FADH2
The final electron acceptor in aerobic respiration is:
oxygen
In the presence of oxygen, all cells synthesize ATP via the process of glycolysis. Many cells also can metabolize pyruvate if oxygen is not present, via the process of:
fermentation
The net result of the breakdown of glucose in glycolysis and fermentation is the production of:
2 ATP
Which stage of aerobic respiration requires ATP?
glycolysis
Which stage of aerobic respiration requires CO2?
none
Which stage of aerobic respiration produces ATP and NADH and releases CO2?
Krebs cycle
The high concentration of protons in the inner mitochondrial space relative to the mitochondrial matrix represents:
potential energy
As protons flow through the ______ , energy is released and exploited to combine ADP and inorganic phosphate to form ATP.
ATP synthase
photosynthesis
plant cells convert light energy into chemical energy that is stored in sugars and other organic compounds.
chlorophyll
green color pigment in plants
How is ATP generated in ETC
ATP is generated as H+ moves down its concentration gradient through a special enzyme called ATP synthase
Where do ETC occur
in mitochondria
where does kreb cycle occur
in mitochondria
where does glycolysis occur
in cytoplasm
where does aerobic respiration occur
in glycolysis, kreb cycle, and ETC
GLycolysis produces:
4 ATP's and 2 NADH, but uses 2 ATP's in the process for a net of 2 ATP and 2 NADH
products released during transisition stage (before krebs cycle)
2 NADH's are generated (1 per pyruvate)
2 CO2 are released (1 per pyruvate)
what is generated during krebs cycle
6 NADH's are generated (3 per Acetyl CoA that enters)
2 FADH2 is generated (1 per Acetyl CoA that enters)
2 ATP are generated (1 per Acetyl CoA that enter
4 CO2 are released (2 per Acetyl CoA that enters)
what is produced together the transistion stage and krebs cycle
8 NADH
2 FADH2
2 ATP
6 CO2
what is the goal of ETC
to break down NADH and FADH2, pumping H+ into the outer compartment of the mitochondria.
ATP is generated as H+ moves down its concentration gradient through a special enzyme called ATP synthase
building blocks of organisms
cells
During which metabolic stage is glucose broken down to pyruvate?
(A) Glycolysis
(B) The citric acid cycle
(C) The electron transport chain
(D) Oxidative phosphorylation
glycolysis
What molecule is essential for aerobic respiration to take place?
(A) Nitrogen
(B) Oxygen
(C) Ethanol
(D) Carbon dioxide
oxygen
Which of the following is not one of the three major macromolecule components of food?
(A) Carbohydrates
(B) Lipids
(C) Oxygen
(D) Proteins
oxygen
Which of the following molecules contains three phosphate groups?
(A) AMP
(B) ADP
(C) APP
(D) ATP
ATP
Which of the following is not a coenzyme?
(A) CoA
(B) FAD
(C) ATP
(D) NAD
ATP
Organisms that acquire energy through photosynthesis are called which of the following?
(A) Autotrophs
(B) Chemotrophs
(C) Prototrophs
(D) Phototrophs
PHototrophs
In which protein complex in the inner mitochondrial membrane is FADH2 oxidized?
(A) I
(B) II
(C) III
(D) V
II
Organisms that acquire energy through ingestion of food are called which of the following?
(A) Autotrophs
(B) Chemotrophs
(C) Prototrophs
(D) Phototrophs
Chemotrophs
Chemotrophs require _________ and produce _________ while phototrophs require _________ and produce _________.
(A) Water, carbon dioxide, nitrogen, oxygen.
(B) Oxygen, carbon dioxide, carbon dioxide, oxygen.
(C) Oxygen, carbon dioxide, nitrogen, water.
(D) Oxygen, water, phosphate, nitrogen
o2 co2 co2 o2
In which protein complex in the inner mitochondrial membrane is ATP synthesized?
(A) I
(B) II
(C) IV
(D) V
V
Metabolic reactions that synthesize molecules are classified as _________ while metabolic reactions that degrade molecules are classified as _________.
(A) Chemotrophic
(B) Phototrophic
(C) Anabolic
(D) Catabolic
anaebolic
What type of metabolic reaction involves a loss of electrons from the molecule involved?
(A) Oxidation
(B) Reduction
(C) Phosphorylation
(D) Isomerization
oxidation
What molecule is produced when oxygen is reduced by the electrons in the electron transport chain?
(A) Hydrogen
(B) Water
(C) NADH
(D) FADH2
water
What type of metabolic reaction involves a gain of electrons by the molecule involved?
(A) Oxidation
(B) Reduction
(C) Phosphorylation
(D) Isomerization
reduction
How many molecules of carbon dioxide are generated during the Kreb cycle?
(A) 1
(B) 2
(C) 3
(D) 4
2
What type of metabolic reaction does not change the atomic make-up of the molecule involved?
(A) Oxidation
(B) Reduction
(C) Phosphorylation
(D) Isomerization
isomerization
What type of metabolic reaction involves the transfer of a phosphate group?
(A) Oxidation
(B) Reduction
(C) Phosphorylation
(D) Isomerization
phosopholyration
Which of the following is not a component of the chemotrophic respiratory pathway?
(A) Glycolysis
(B) The citric acid cycle
(C) Photosynthesis
(D) Oxidative phosphorylation
photosynthesis
What is the name of the molecule generated in the final step of the Kreb cycle and is also used in the first step?
(A) Oxaloacetate
(B) Pyruvate
(C) Acetyl-CoA
(D) NADH
oxalocetate
Respiration that occurs without oxygen is classified as which of the following
(A) Chemotrophic
(B) Phototrophic
(C) Aerobic
(D) Anaerobic
anerorbic
What is the main cellular structure involved in respiration?
(A) Nucleus
(B) Golgi apparatus
(C) Mitochondria
(D) ER
mitochondria
Which of the following does not accurately describe the glycolytic pathway?
(A) Anabolic
(B) Catabolic
(C) Chemotrophic
(D) Metabolic
anabolic
How many carbon atoms are found in one molecule of glucose?
(A) 1
(B) 3
(C) 6
(D) 9
6
What is the end product of aerobic glycolysis?
(A) Citrate
(B) Pyruvate
(C) ATP
(D) NADH
pyruvate
In what part of the cell does glycolysis take place?
(A) Cytosol
(B) Mitochondria
(C) Golgi apparatus
(D) ER
cytosol
An enzyme that catalyzes a reaction that adds a phosphate group to a molecule is called which of the following?
(A) Aldolase
(B) Enolase
(C) Kinase
(D) Phosphorylase
kinase
Which of the following molecules is not either oxidized or reduced during electron flow through the electron transport chain?
(A) NADH
(B) FADH2
(C) Coenzyme A
(D) Oxygen
Coenzyme A
How many molecules of ATP are produced during glycolysis (the net gain of ATP molecules)?
(A) 2
(B) 4
(C) 12
(D) 24
2
Which of the following atoms is involved in glycolytic reactions to shield negative charges?
(A) Sodium
(B) Oxygen
(C) Magnesium
(D) Phosphorous
magnesium
Which of the following metabolic processes generates the most ATP?
(A) Glycolysis
(B) The citric acid cycle
(C) The electron transport chain
(D) Oxidative phosphorylation
oxydative phospholoration
Where in an aerobic cell is NADH oxidized?
(A) Cytosol
(B) Mitochondria
(C) Golgi apparatus
(D) ER
mitochondria
Which of the following events do not take place in the mitochondria?
(A) Glycolysis
(B) The citric acid cycle
(C) The electron transport chain
(D) Oxidative phosphorylation
glycolysis
Which of the following is not a possible anaerobic glycolytic product?
(A) Oxygen
(B) Lactic acid
(C) Ethanol
(D) Carbon dioxide
oxygen
Ethanol is a product of which of the following processes?
(A) The citric acid cycle
(B) Homolactic fermentation
(C) Oxidative phosphorylation
(D) Alcoholic fermentation
alcoholic fermetatio
Which of the following is not a structural component of the mitochondria?
(A) Matrix
(B) Cytosol
(C) Inner membrane
(D) Intermembrane spac
cytosol
What is the starting material of the citric acid cycle?
(A) Acetyl-CoA
(B) Glucose
(C) Pyruvate
(D) NADH
Acetly coA
Which stage in respiration produces the most coenzymes?
(A) Glycolysis
(B) The kreb cycle
(C) The electron transport chain
(D) Oxidative phosphorylation
kreb cycle
The outer mitochondrial membrane is highly _________ while the inner membrane is _________.
(A) Permeable, impermeable
(B) Impermeable, permeable
(C) Charged, uncharged
(D) Uncharged, charged
permiable, impermialbe
Which of the following is not generated during the citric acid cycle?
(A) GTP
(B) NADH
(C) Carbon dioxide
(D) Pyruvate
pyruvate
Which of the following molecules does not freely cross the inner mitochondrial membrane?
(A) Oxygen
(B) Carbon dioxide
(C) Pyruvate
(D) Water
pyruvate
How many molecules of NADH are generated during the citric acid cycle?
(A) 1
(B) 2
(C) 3
(D) 4
3
How many molecules of FADH2 are generated during the citric acid cycle?
(A) 1
(B) 2
(C) 3
(D) 4
1
In which protein complex in the inner mitochondrial membrane is oxygen reduced?
(A) I
(B) II
(C) III
(D) IV
IV
The coenzyme NAD/NADH is involved in which of the following types of reactions?
(A) Elimination
(B) Isomerization
(C) Oxidation/reduction
(D) Phosphorylation
oxidation/reduction
Which of the following is NOT a stage of cellular respiration?
a. fermentation c.glycolysis
b. electron transport d.Krebs cycle
fermentation
What are the reactants in the equation for cellular respiration?
a. oxygen and lactic acid c.glucose and oxygen
b. carbon dioxide and water
d. water and glucose
glucose and oxygen
The starting molecule for glycolysis is
a. ADP. c. citric acid.
b. pyruvic acid. d. glucose.
glucose
One cause of muscle soreness is
a. alcoholic fermentation. c. lactic acid fermentation.
b. glycolysis. d. the Krebs cycle.
lactic acud
Which process is used to produce beer and wine?
a. lactic acid fermentation
c.alcoholic fermentation
b. glycolysis d. the Krebs cycle
alcoholic fermentation
The conversion of pyruvic acid into lactic acid requires
a. alcohol. c. ATP.
b. oxygen. d. NADH.
NADH
Which organism is NOT likely to carry out cellular respiration?
a. tree c. anaerobic bacterium
b. mushroom d. tiger
anerobic bacterium
During one turn, the Krebs cycle produces
a. oxygen. c. electron carriers.
b. lactic acid. d. glucose.
electron carriers
Which of the following passes high-energy electrons into the electron transport chain?
a. NADH and FADH2 c. citric acid
b. ATP and ADP d. acetyl-CoA
NADH and FADH2
Cellular respiration uses one molecule of glucose to produce
a. 2 ATP molecules. c. 36 ATP molecules.
b. 34 ATP molecules. d. 38 ATP molecules.
36 ATP
Breathing heavily after running a race is your body’s way of
a. making more citric acid.
b. repaying an oxygen debt.
c. restarting glycolysis.
d. recharging the electron transport chain.
repaying an oxygen debt
All of the following are sources of energy during exercise EXCEPT
a. stored ATP. c. lactic acid fermentation.
b. alcoholic fermentation. d. cellular respiration.
alcoholic fermentation
Which process does NOT release energy from glucose?
a. glycolysis c. fermentation
b. photosynthesis d. cellular respiration
photosynthesis
Photosynthesis is to chloroplasts as cellular respiration is to
a. chloroplasts. c. mitochondria.
b. cytoplasm. d. nucleus.
mitochondria
Plants cannot release energy from glucose using
a. glycolysis. c. the Krebs cycle.
b. photosynthesis. d. cellular respiration.
photosynthesis
Which of the following is released during cellular respiration?
a. oxygen c. energy
b. air d. lactic acid
energy
Cellular respiration releases energy by breaking down
a. food molecules. c. carbon dioxide.
b. ATP. d. water.
food molecules
Which of these is a product of cellular respiration?
a. oxygen c. glucose
b. water d. all of the above
water
Which of these processes takes place in the cytoplasm of a cell?
a. glycolysis c. Krebs cycle
b. electron transport d. all of the above
glycolsis
Glycolysis provides a cell with a net gain of
a. 2 ATP molecules. c. 18 ATP molecules.
b. 4 ATP molecules. d. 36 ATP molecules.
2ATP molecule
Lactic acid fermentation occurs in
a. bread dough.
b. any environment containing oxygen.
c. muscle cells.
d. mitochondria.
muscle cells
The two main types of fermentation are called
a. alcoholic and aerobic. c. alcoholic and lactic acid.
b. aerobic and anaerobic. d. lactic acid and anaerobic.
alcholic and lactic
In the presence of oxygen, glycolysis is followed by
a. lactic acid fermentation. c. photosynthesis.
b. alcoholic fermentation. d. the Krebs cycle.
krebs cycle
Cellular respiration is called an aerobic process because it requires
a. light. c. oxygen.
b. exercise. d. glucose.
oxygen
The starting molecule for the Krebs cycle is
a. glucose. c. pyruvic acid.
b. NADH. d. coenzyme A.
pyruvic acid
In eukaryotes, electron transport occurs in the
a. mitochondria. c. cell membrane.
b. chloroplasts. d. cytoplasm.
mitochondria
The energy of the electrons passing along the electron transport chain is used to make
a. lactic acid. c. alcohol.
b. citric acid. d. ATP.
atp
When the body needs to exercise for longer than 90 seconds, it generates ATP by carrying out
a. lactic acid fermentation. c. cellular respiration.
b. alcoholic fermentation. d. glycolysis.
cellular respiration
Unlike photosynthesis, cellular respiration occurs in
a. animal cells only. c. all but plant cells.
b. plant cells only. d. all eukaryotic cells.
all eukaryotic cells
The products of photosynthesis are the
a. products of cellular respiration. c. products of glycolysis.
b. reactants of cellular respiration. d. reactants of fermentation.
reactants of cellular respiration
During aerobic cellular respiration, in which of the following location do ATP molecules form?
a. Cytosol only c. mitochondrial matrix, and outer mitochondrial membrane only
b. Mitochondrial matrix only d. Cytosol, mitochondrial matrix, and outer membrane only
mitochondrial matrix only
The aerobic and anaerobic pathways of cellular respiration require which product of glycolysis?
a. NADH and ATP c. Pyruvate and NADH
b. Pyruvate and ATP d. ATP,pyruvate, and NADH
pyruvate and NADH
Which process generates most of the ATP produced during cellular respiration?
a. Electron transport chain c. Glycolysis
b. Fermentation d. Krebs cycle
electron transport chain
While investigating yeast respiration, a researcher detects ethanol in the yeast culture. Which molecule does the yeast culture also contain?
a. Lactic acid and ATP c. Carbon dioxide and ATP
b. Oxygen and lactic acid d. Oxygen and carbon dioxide
carbon dioxide and ATP
Oxidation
the removal of electrons, or addition of oxygen
Reduction
the addition of electrons