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Bio exam 3

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Created by: Jasminemarisa

Question	Answer
_______ is lifeâs primary source of energy. Food Water Sunlight ATP	Sunlight
Which of the following statements is not correct? Energy cannot be created or destroyed Energy cannot change from one form to another Energy tends to disperse spontaneously	Energy cannot change from one form to another
Entropy _____ Disperse Is a measure of disorder Always increases, overall Disperse and is a measure of disorder	Disperse and is a measure of disorder
If we liken a chemical reaction to an energy hill, then a(n) ______ reaction is an uphill run. Endergonic Exergonic Catalytic Both endergonic and catalytic	Endergonic
If we liken a chemical reaction to an energy hill, then activation energy is like _______ A burst of speed Coasting downhill A bump at the top of a hill	A bump at the top of a hill
_______ are always changed by participating in a reaction ( choose all that are correct ) Enzymes Cofactors Reactants Coenzymes	Reactants and coenzymes
Name one environmental factor that typically influences enzyme function.	Temperature, pH, pressure, salt
A metabolic pathway may__________ Build or break down molecules Include an electron transfer chain Generate heat All of the above	All of the above
All antioxidants _______ Prevent other molecules from being oxidized Are necessary in the human diet Balance charge Deoxidize free radicals	Deoxidize free radicals
Solutes tend to diffuse from a region where they are _____ (more/less) concentrated to an adjacent region where they are _______(more/less) concentrated.	More, less
______ cannot easily diffuse across a lipid bilateral. Water Grass Ions All of the above	Ions
A transport protein require ATP to pump sodium ions across a membrane. This is a case of ______. Passive transport Active transport Facilitated diffusion Passive transport and facilitated diffusion	Active transport
Immerse a human blood cell in a hypotonic solution and water ______ Diffuses into the cell Diffuses out of the cell Shows no net movement Moves in by endocytosis	Diffuses into the cell
Vesicles form during _____ Endocytosis Exocytosis Phagocytosis Endocytosis and phagocytosis	Endocytosis and phagocytosis
Reactant	Enters a reaction
Phagocytosis	One cell engulfs another
First law of thermodynamics	Energy cannot be created or destroyed
Product	Forms at reactions end
Cofactor	Assists enzymes
Concentration gradient	Basis of diffusion
Passive transport	No energy input required
Active transport	Requires energy input
A cat eats a bird, which ate a caterpillar that chewed on a weed. Which of these organisms are autotrophs? Which ones are heterotrophs?	A: weed H: cat, bird, caterpillar
Which of the following statements is incorrect? Pigments absorb light of certain wavelengths only. Many accessory pigments are multipurpose molecules. Chlorophyll is a green because it absorbs green light.	Chlorophyll is a green because it absorbs green light.
In plants the light dependent reactions proceed at/ in the ______. Thylakoid membrane Plasma membrane Strong Cytoplasm	Thylakoid membrane
When a photosystem absorb light ______. Sugar phosphates are produced Electrons are transferred to ATP RuBP accepts electrons Electrons are ejected from its special pair	Electrons are ejected from its special pair.
In the light dependent reactions, _____ Caribou dioxide is fixed ATP forms Sugars form CO2 accepts electrons ATP forms and sugars form Carbon dioxide is fixed and sugars form	ATP forms
What accumulates inside the thylakoid compartment during the light dependent reactions? Sugars Hydrogen ions O2 CO2	Hydrogen ions
Light independent reactions in plants proceed at/in the _____ of chloroplasts. Thylakoid membrane Plasma membrane Stroma Cytoplasm	Stroma
The atoms in the molecular oxygen released during photosynthesis come from split _____ molecules. Sugar CO2 Water O2	Water
The Calvin Benson cycle starts when ________ Light is available Carbondioxide is attached to RuBP Electrons leave photosystem 2	Carbondioxide is attached to RuBP
Which of the following substance does not participate in the Calvin Benson cycle? ATP O2 NADPH RuBP PGAL CO2	O2
Plants use energy in ______ to drive photosynthesis. Light Hydrogen ions O2 CO2	Light
Most of the carbon dioxide used in photosynthesis comes from _______. Glucose The atmosphere Rainwater Photolysis	The atmosphere
PGAL formation	ATP, NADPH needed
CO2 fixation	Rubisco function
Photolysis	Water molecules split
ATP forms; NADPH does not	Electron cycle back to photosystem 1
Photorepiration	Problem in C3 plants
Photosynthesis	Converts light to chemical energy
Pigment	Absorbs light
Autotroph	Self feeder
Mitochondrial matrix	Inner space
Pyruvate	Product of glycolysis
NAD+	Needed for glycolysis
Mitochondrion	Makes many ATP
NADH	Reduced coenzyme
Anaerobic	No oxygen required
Hydrogen ion flow drives ATP synthesis during _______. Glycolysis The Krebs cycle Aerobic respiration Fermentation Both glycolysis and aerobic respiration	Aerobic respiration
Which of the following is not produced by an animal muscle cell operating under anaerobic conditions? Heat Lactate ATP NAD+ Pyruvate All are produced	All are produced
You body cells can break down _____ as a source of energy to fuel ATP production. Fatty acids Glycerol Amino acids All of the above	All of the above
_____ accepts electrons in alcoholic fermentation. Oxygen Pyruvate Acetaldehyde Ethanol	Ethanol
Most of the energy that is released by the full breakdown of glucose to CO2 and water ends up in _____. NADH ATP Heat Electrons	ATP
In the third stage of aerobic respiration, _____ is the final acceptor of electrons. Water Hydrogen Oxygen NADH	Oxygen
After the Krebs reactions run through _______ cycle, one Glucose has been completely broken down to CO2. One Two Three Six	Two
Which of the following reaction pathways is not part of the second stage of aerobic respiration? ETP Acetyl-CoA formation Krebs cycle Glycolysis ETP and glycolysis	ETP and Glycolysis
In eukaryotes fermentation is completed in the _______. Nucleus Mitochondrion Plasma membrane Cytoplasm	Cytoplasm
In eukaryotes aerobic respiration is completed in the _____. Nucleus Mitochondrion Plasma membrane Cytoplasm	Mitochondrion
Which molecule does not form glycolysis? NADH Pyruvate Oxygen ATP	Oxygen
Which of the following metabolic pathways require molecular oxygen? Aerobic respiration Lactate fermentation Alcoholic fermentation All of the above	Aerobic respiration
Glycolysis starts and ends in the _______. Nucleus Mitochondrion Plasma membrane Cytoplasm	Cytoplasm
True/False. Blume animals which make ATP by aerobic respiration, plants make all of their ATP by photosynthesis.	True