What is the primary role of enzymes in metabolism?
Provide energy for reactions
Transport substances across membranes
Catalyze metabolic reactions
Store genetic information
Related Questions
The chemical reactions which liberate energy by enzymatic oxidation of food stuffs to and , in the tissues are referred to as the
Energy metabolism
Respiratory metabolism
None of these
Both (a) and (b)
Anabolism is best described as:
The breakdown of complex molecules into simpler ones.
The synthesis of complex molecules from simpler ones.
The regulation of metabolic pathways.
The transport of substances across membranes.
All the chemical reactions occurring in living organisms are called
Metabolism
Anabolism
Catabolism
Enzymatic
Which of the following is NOT a characteristic of metabolic pathways?
Regulation of the pathway
Catalysis by enzymes
Occurring in a non-sequential manner
Often compartmentalized within cells
Catabolism is best described as:
The synthesis of complex molecules from simpler ones.
The breakdown of complex molecules into simpler ones.
The regulation of metabolic pathways.
The transport of substances across membranes.
Which of the following statements are correct?
I. Acetic acid can form cholesterol
II. Flow of metabolites through metabolic pathway has a definite rate and direction. It is called dynamic state of body constituents
III. Anabolic pathway is endergonic while catabolic pathway is exergonic
IV. All biomolecules have a term over, i.e., they are constantly being changed into some other biomolecules and also made from other biomolecules
The correct options is
All are correct
I and II are correct
Only IV is correct
All are wrong
The free energy of a system, in a spontaneous reaction
Decreases
Increases
Becomes equal to zero
Remains unchanged
A researcher isolates an enzyme from a thermophilic bacterium and finds that its activity dramatically decreases when incubated at 25°C compared to its optimal temperature of 70°C. This decrease in activity is MOST likely due to:
Increased substrate affinity at lower temperatures.
Changes in the enzyme's three-dimensional structure affecting the active site.
A decrease in the activation energy of the catalyzed reaction.
An increase in the concentration of competitive inhibitors at lower temperatures.
Select the false statement I. Living process is a constant effort to prevent falling into equilibrium II. Energy can enter and leave a cell III. Matter can enter and leave a cell IV. Metabolic pathways are interlinked
Only I
Only IV
I and IV
Only II
The regulation of the chemical composition of blood and body fluids and other aspects of its internal environment by an organism to maintain the physiological process is called
Entropy
Enthalpy
Homeostasis
Metabolism
