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WorksheetsBiology and Cellular Processes Quiz
Total questions: 49
Worksheet time: 25mins
The surface of a peripheral membrane protein would be best described as:
hydrophobic
hydrophilic
amphipathic
completely covered by the phospholipids
Identify which of these is not a product of cellular respiration:
C6H12O6
ATP
H2O
CO2
Approximately how many molecules of ATP are produced from the complete oxidation of two molecules of glucose (C6H12O6) in cellular respiration?
2
4
38
76
How does a non-competitive inhibitor decrease the rate of an enzyme reaction?
by binding at the active site of the enzyme
by changing the structure of the enzyme
by acting as a coenzyme for the reaction
by decreasing the activation energy of the reaction
During oxidative phosphorylation, H2O is formed. Where does the oxygen for the synthesis of the water come from?
molecular oxygen, O2
glucose, C6H12O6
carbon dioxide, CO2
pyruvate, C3H3O3-
Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as the reaction's:
enthalpy
activation energy
heat content
endothermic level
What kinds of molecules pass through a cell membrane most easily?
large and hydrophobic
small and hydrophilic
very polar
monosaccharides (such as glucose)
A cell whose cytoplasm has a concentration of 0.02 molar glucose is placed in a test tube of water containing 0.02 molar glucose. Assuming that glucose is not actively transported into the cell, which of the following terms describes the tonicity of the external solution relative to the cytoplasm of the cell?
isotonic
hypertonic
hypotonic
turgor pressure
Which of the following is most similar in structure to ATP?
an anabolic steroid
an amino acid
a phospholipid
an RNA nucleotide
According to the second law of thermodynamics, which of the following statements is correct?
Earth is an open system.
A living cell can never function as a closed system.
Every chemical reaction in a cell results in a loss of available energy.
The synthesis of large molecules from small molecules is endergonic.
The Calvin cycle goes through all the following phases except what?
electron transport
CO2 fixation
sugar creation
RuBP regeneration
Which of the following is true for all endergonic reactions?
The products have more total energy than the reactants.
A net output of energy to the surroundings will occur.
The reactions are spontaneous.
The reaction causes a release of free energy.
What is the effect from fermentation when it occurs in humans?
a little ATP is produced, along with lactic acid
ethanol is produced as a byproduct
pyruvate moves to the prep reaction
oxygen is used to remove carbons from a glucose molecule
Where does the Calvin cycle take place?
stroma of the chloroplast
in the thylakoid membrane
in the cell's cytoplasm
within a chlorophyll molecule
Where does glycolysis take place?
(a)
ATP generally energizes a cellular process by....
acting as a catalyst.
releasing heat upon hydrolysis.
binding directly to the substrate(s) of the enzyme.
breaking a high-energy bond
What is the final main product of glycolysis?
pyruvate
ATP
NADH
an acetyl group
What is the primary function of fermentation?
getting work done quickly
anaerobic breakdown of glucose
rapid bursts of energy
all of the above
Which of the following forms of energy is not a form of kinetic energy?
chemical
light
mechanical
heat
Plants appear green because they reflect which color:
green
red
blue
violet
A series of enzyme catalyze the reaction X-> Y -> Z -> A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme.
A coenzyme
A non competitive inhibitor
A substrate
A competitive inhibitor
The first law of thermodynamics states that energy can be neither created nor destroyed. For living organisms, which of the following is an importance of the first law?
The energy content of an organism is a constant
The organism ultimately must obtain all of the necessary energy for life from its environment
The entropy of an organism decreases with time as the organism grows in complexity
Organisms are unable to transform energy
Which of the following types of molecules is not a major structural component of the cell membrane?
phospholipids
proteins
cellulose
cholesterol
Carbon fixation involves the addition of carbon dioxide to
rubisco
RuBP
G3P
NADPH
What is the final electron acceptor in the aerobic respiration process?
oxygen from respiration
pyruvate from glycolysis
carbon from carbon dioxide
carbon from the glucose
What is one of the main objectives of the electron transport chain in photosynthesis?
make a hydrogen ion gradient
create protein-based enzymes
have pyuravate accept electrons
recreate the beginning carbon chain
What is the primary function of the Calvin cycle?
synthesize simple sugars from carbon dioxide
use ATP to release carbon dioxide
use NADPH to release carbon dioxide
split water and release oxygen
The range of all light found in the universe is known as
The electromagnetic spectrum
light
photons
wavelength
In mitochondria, chemeimosis translocates protons from the matrix into the inter membrane space, whereas in chloroplasts, chemiosomosis translocates protons from…
the stroma to the photosystem ll
the matrix to the stroma
the stroma to the thylakoid space
the inter membrane space to the matrix
Name the final product from the light reaction
NADPH
ATP
O2
these are all products
An orderly sequence of reactions with specific enzyme mediated reactions occuring at each step is the definition of:
metabolic pathyways
energy carriers
the induced-fit model
Intermediary compunds
What is known as the “magic molecule” since all necessary plant molecules can be derived from it?
G3P
BPG
glucose
cellulose
How much times must the citric acid cycle repeat for every glucose used?
1
2
3
more than 3 times
What is NADPH?
A coenzyme
A factor
A cofactor
an enzyme
Where are the proteins of the electron transport chain located?
cytosol
mitochondrial outer membrane
mitochondrial inner membrane
mitochondrial inner membrane space
What is the primary function of fermentation?
getting work done quickly
anerobic breakdown of glucose
rapid bursts of energy
all of the above
A series of enzyme catalyze the reactions X -> Y -> Z -> A. Product A binds to the enzyme that converts X to Y decreases the activity of the enzyme. This process describes…
how coenzymes work
feedback inhibitation
a substrate cycle
A competitive product
“The capacity to do work” defines…
energy
diffusion
entropy
electron flow
Approximately how much ATP molecules are generated from cellular respiration?
2
26
30
38
Knowing what you know about cell membranes, what is one way that the membranes of winter wheat are able to remain fluid when it is extremely cold?
by increasing the percentage of unsaturated phospholipids in the membrane
by increasing the percentage of unsaturated cholesterol molecules in the membrane
by increasing the number of hydrophobic proteins in the membrane
by including water within the membrane
When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the inner membrane space, the result is the….
creation of protein gradient
formation of ATP
reduction of NAD+
Lowering of ph in the mitochondrial matrix
Most ATP in cell respiration is created during what process?
the citric acid cycle
electron transport
the prep reaction
fermentation
All of the following processes take material into cells except:
pinocytosis
receptor-meditated cytosis
exocytosis
phagocytosis
Which term most precisely describes the cellular process of breaking down large molecules into smaller ones.
catalysis
dehydration
anabolic reading
catabolic reaction
CAM plants keep stomata in daytime, thus reducing loss of water. They can do this because…
They fix CO2 into organic acids during the night
They fix CO2 into sugars in the bundle-shealth cells
They fix CO2 into pyruvate in the mesophyll cells
They use the enzyme phosphofructokinase, which outcompetes rubisco for CO2
Which of the following is not true about an enzyme
its a carbohydrate
its a catalyst
its shape determines its speciality
It lowers the activation energy
Potential energy can be defined as…
the energy of motion
the energy of rest
the energy of change
none of the above
The movement of a substance across a biological membrance against its concentration gradient with the help of energy input is:
facilitated diffusion
active transport
osmosis
exocytosis
The vast majority of the ATP molecules from cellular metabolism are produced when?
the citric acid cycle
the electron transport chain
fermentation
glycosis
