الامتحان الثاني للعلوم الحياتية 1||اللجان الطلابية
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رقم السؤال: 1           درجة السؤال: 1
hydrolysis of  ATP result in a release of free energy of ......kcal /mole
 7.3
 1.2
 20.5
 180
 168
رقم السؤال: 2           درجة السؤال: 1
all of the following are function of membrane protein except of 
 enzymatic activity
 RNA production
 facilitated diffusion
 hormonal receptors
 intracellular joining
رقم السؤال: 3           درجة السؤال: 1
which of the following best describes the phospholipids  of plasma membrane 
 amphipathic
 sandwished between two layers of proteins
 hold togather by ester bond
 rarely move leterally
 both A and C
رقم السؤال: 4           درجة السؤال: 1
the region of the enzymes which bind to substrate is called 
 allosteric side
 N-terminus
 C-terminus
 active site
 none
رقم السؤال: 5           درجة السؤال: 1
LDL-cholesterol complex in blood is transported into body cell by 
 receptor mediated endocytosis
 simple diffusion
 active transport
 facilitated diffusion
 cotransport with Na
رقم السؤال: 6           درجة السؤال: 1
which of the following can freely diffuse across phospholipids
 glucose and oxgeyn
 glucose and water
 carbon dioxide and O2
 hydrocarbon and k ions
 both c and D
رقم السؤال: 7           درجة السؤال: 1
red blood cell shrink and plant cell plasmolysis when both are placed in ....... solution 
 hypertonic
 isotonic
 hypotonic
 any of the above
رقم السؤال: 8           درجة السؤال: 1
in certain type of cell passege of large amount of water is facilitated by :

 membrane lipids bilayer
 membrane aquaporin
 active transport system
 cotransport Na ions
 cotransport H+
رقم السؤال: 9           درجة السؤال: 1
the process of enculfing solid substance by cell is called 
 plasmolysis
 receptor mediated endocytosis
 exocytosis
 pinocytosis
 phagocytosis
رقم السؤال: 10           درجة السؤال: 1
a cell take  a droplet of liquid containing dissolved  materials by
 facilitated diffusion
 exocytosis
 endocytosis
 pinocytosis
 sodium potassium pump
رقم السؤال: 11           درجة السؤال: 1
Na and K pump
 transport Na down their concentration gradient
 transport K down their concentration gradient
 an electrogenic pump
 transport Na and k through protein channel
 all of the above
رقم السؤال: 12           درجة السؤال: 1
which of the following not a part of cell membrane
 lipids
 nucleic acid
 proteins
 glycolipids
 all of them
رقم السؤال: 13           درجة السؤال: 1
contractile vacuole in paramecuim
 pump excess water outside the cell
 help paramecium live in fresh water
 involved in phagocytosis
 involved in pinocytosis
 only A and B
رقم السؤال: 14           درجة السؤال: 1
glucose is taken  up by red blood cell by mechanisem called 
 simple diffusion
 faciliated diffusion
 active transport
 cotransport
 pinocytosis
رقم السؤال: 15           درجة السؤال: 1
if an enzyme require Fe+2 for its activity in reaction .the Fe+2 is best identified by
 coenzyme
 cofactor
 substrate
 product
 inhibitor
رقم السؤال: 16           درجة السؤال: 1
which of the following is true about the enzyme
 decrease rate of the reaction
 lowering the activation of energy
 change the direction of chemical reaction
 permanently alter their structure by the reaction their catalyze
 provide activation energy for the reaction they catalyze
رقم السؤال: 17           درجة السؤال: 1
B-oxidation is
 is the second step in the oxidation of glucose
 is processed used to oxidase fatty acid
 is a process used to delaminate amino acid
 is a process used to digest some polysacaride
 both B and C are true
رقم السؤال: 18           درجة السؤال: 1
compitative inhibitors stop an enzyme from working by
 changing the shape of the enzyme
 binding with the substrate
 blocking the active site of the enzyme
 modifying the product of reaction
رقم السؤال: 19           درجة السؤال: 1
which of the following pairs are mismatched 
 enzyme and substrate
 ATP and mechanical work
 enderogonic and spontaneous
 none of the above
رقم السؤال: 20           درجة السؤال: 1
the sodium potassium pump is example of 
 active transport
 endocytosis
 exocytosis
 facilitated diffusion
رقم السؤال: 21           درجة السؤال: 1
the substrate of ATP used in metabolism is most closely related to 
 DNA nucliotide
 an amino acid with 3 phosphate groups
 RNA nucleotide
 phospholipids
رقم السؤال: 22           درجة السؤال: 1
the minimum amount of energy required fora reaction to occur is called
 activiation energy
 kinetec energy
 thermal energy
 heat
 none of the following
رقم السؤال: 23           درجة السؤال: 1
in plasma membrane in animal cell which substance work as a temperature buffers 
 glygolipids
 saturated fatty acid
 cholestrol
 triglysarol
رقم السؤال: 24           درجة السؤال: 1
in which solution plant cell turgid
 isotonis
 hypotonic
 hypertonic
 dead sea warter
رقم السؤال: 25           درجة السؤال: 1
which process does not directly need ATP
 cell movement
 Na an K pump
 glycolysis
 active transport
 diffusion
رقم السؤال: 26           درجة السؤال: 1
the process of engulfing a solid substance by cell called 
 plasmolysis
 receptor mediated endocytosis
 exocytosis
 pinocytosis
 phagocytosis
رقم السؤال: 27           درجة السؤال: 1
facilitated diffusion 
 require energy
 is highly specific for a particular molecule
 move molecule down their gradient only
 only B and c correct
 all of they are correct
رقم السؤال: 28           درجة السؤال: 1
a cell takes a  droplet of liquid containing dissolved meterial by
 facilitated diffusion
 exocytosis
 phagocytosis
 pinocytosis
 sodium potassium pamp
رقم السؤال: 29           درجة السؤال: 1
enzymes catalyze reaction by 
 (lowering activation of energy (EA
 increasing the amount of heat required to begin
 allowing reactant to reach transition state faster
 all of the above
 A and C are true
رقم السؤال: 30           درجة السؤال: 1
ATP power celluler work when 
 hydrolysis
 synthesized
 loses phosphate groups
 A AND C
 None of the above


   



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