Question

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65) The induction of enzymes synthesis is belived to involve the combination of the inducer molecule with the repressor protein; thereby, inactivating the repressor protein so it is unable to bind to the operator gene, thus allowing protein synthetic processes to proceed. O True O False 66) Coenzymes serve as 'carrier' molecules, the coenzyme may be (1 pts) O derived from vitamins metal ions O two of the above are correct O None of the above are correct (1 pts) 67) The rate of an enzyme--mediated reaction depends on substrate concentration up to the enzyme saturation point enzyme concentration as controlled by induction/repression control mechanisms enzyme activity as controlled by allosteric regulation and chemical alteration OTwo of the above are correct. All of the above are correct. 68) The functioning of a chemotroph depends upon its ability to extract and use the chemical potential energy locked within the structure of organic molecules. O True O False

Answer 1

Answer 65:
Option - True

The regulation of a gene is controlled by an operon. The operon works only after the binding of inducer molecule on the repressor protein.  

Answer 66:
Option - Two of the above are correct

Coenzymes are required for the enzyme for their function. These coenzymes can be derived from Vitamins as well as from metal ions.

Answer 67:
Option - All of the above are correct

The rate of enzyme mediated reaction depends upon various factors including the pH and temperature. The substrate concentration, the enzyme concentration and the concentration of the product formed are also factors that effect the rate of enzyme mediated reaction. Allosteric regulation also controls rate of enzyme reaction.

Answer 68:
Option - True

Chemotrophs are organisms that can derive energy from chemical compounds - organic as well as inorganic.