181 Inhibitors which block the enzyme by forming weak bond are called___________? Biology Medium Full question → A Competitive inhibitors. B Non-competitive inhibitors C Irreversible inhibitors. D Both a and b
182 Magnifying power of electron microscope as compared to eye is____________? Biology Medium Full question → A 500 X B 250000X C 500000X D 250X
183 Malonic acid is an example of____________? Biology Medium Full question → A Irreversible inhibitor B Reversible inhibitor C Competitive inhibitor D Non-competitive inhibitor
184 The structure of an enzyme is altered by____________? Biology Medium Full question → A Irreversible inhibitor B Reversible inhibitor C Competitive inhibitor D Non-competitive inhibitor
185 In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon____________? Biology Medium Full question → A Their physical properties like size & weight. B Physical properties of the medium like its density. C Their electrical properties like their charges D Both a and b
186 If enzyme concentration is low than substrate pH and temperature values are equal to requirement then which of the following will increase rate of reaction____________________? Biology Medium Full question → A increase in concentration of enzyme B increase in concentration of substrate C increase in pH D increase in temperature
187 Excessive increase in temperature of medium causes the enzyme molecule to____________? Biology Medium Full question → A Activate B Unaffected C Denatured D None of these
188 Resolution power of a compound microscope is___________? Biology Medium Full question → A 2.0 ?m B 2-4 A C 24 ?m D 24 A
189 Extreme change in pH results in______________? Biology Medium Full question → A Change in ionization of amino acids at the active site of the enzyme B Change in the ionization of the substrate C Denaturation of the enzyme D Increase in the reaction rate
190 Who opposed the idea the cell is an empty space bounded by thick wall? Biology Medium Full question → A Lorenz Oken B Schwann C Robert Brown D Rudolph Virchow
191 If more substrate to already occurring enzymatic reaction is added and there is no effect on the rate of the reaction what is the form given to this situation___________? Biology Medium Full question → A Saturation B Denaturation C Composition D Inhibition
192 Factory of Ribosomal systhesis is__________? Biology Medium Full question → A Cytoplasm B Nucleus C Nucleolus D Endoplasmic reticulum
193 The active site of an enzyme______________? Biology Medium Full question → A Never changes B Forms no chemical bond with substrate C Determined by structure and the specificity of the enzyme D They are non specific in their action
194 If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of____________________? Biology Medium Full question → A Enzymes get denatured at higher substrate conc B Rate of reaction is indirectly proportional to substrate concentration at this point C All the active sites on enzyme molecule are occupied D None of these
195 Which statement is incorrect about Lock and Key Model________________? Biology Medium Full question → A Specific enzyme can transform only a specific substrate B Active site of an enzyme is a non flexible structure C Active site does not change before during or even after the reaction D It explains the mechanism of every chemical reaction
196 The rate of reaction is directly proportional to the concentration of an enzyme which statement is incorrect in this respect_________________? Biology Medium Full question → A Increase in enzyme molecule increases the available active sites. B This relation is for unlimited time period with unlimited enzyme concentration C If the concentration is doubled the rate will become two fold. D None of these.
197 A group of ribosomes attached to mRNA is known as___________? Biology Medium Full question → A Polymer B Polypeptide C Polysomes D Monomer
198 If more substrate to already occurring enzymatic reaction is added more enzyme activity is seen because_____________? Biology Medium Full question → A There is probably more substrate present than there is enzyme. B There is probably more enzayme available than there is substrate . C There is probably more product present than there is either substrate or enzyme. D The enzyme substrate complex is probably failing to form during the reaction
199 Cellular organelles related with H2O2 are___________? Biology Medium Full question → A Glyoxisomes B Lysosomes C Peroxisomes D Ribosomes
200 A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called_________________? Biology Medium Full question → A Active site B Binding site C Catalytic site D Allosteric site