Two groups of tomatoes were grown under laboratoryconditions, one with humus added to the soil and one acontrol without humus. The leaves of the plants grownwithout humus were yellowish (less green) compared withthose of the plants grown in humus-enriched soil. The bestexplanation is that(A) the healthy plants used the food in the decomposing leavesof the humus for energy to make chlorophyll.(B) the humus made the soil more loosely packed, so waterpenetrated more easily to the roots.(C) the humus contained minerals such as magnesium andiron needed for the synthesis of chlorophyll.(D) the heat released by the decomposing leaves of the humuscaused more rapid growth and chlorophyll synthesis.
Enzyme kinetics
In biochemistry, enzymes are proteins that act as biological catalysts. Catalysis is the addition of a catalyst to a chemical reaction to speed up the pace of the reaction. Catalysis can be categorized as either homogeneous or heterogeneous, depending on whether the catalysts are distributed in the same phase as that of the reactants. Enzymes are an essential part of the cell because, without them, many organic processes would slow down and thus will affect the processes that are important for cell survival and sustenance.
Regulation of Enzymes
A substance that acts as a catalyst to regulate the reaction rate in the living organism's metabolic pathways without itself getting altered is an enzyme. Most of the biological reactions and metabolic pathways in the living systems are carried out by enzymes. They are specific for their works and work in particular conditions. It maintains the best possible rate of reaction in the most stable state. The enzymes have distinct properties as they can proceed with the reaction in any direction, their particular binding sites, pH specificity, temperature specificity required in very few amounts.
Two groups of tomatoes were grown under laboratory
conditions, one with humus added to the soil and one a
control without humus. The leaves of the plants grown
without humus were yellowish (less green) compared with
those of the plants grown in humus-enriched soil. The best
explanation is that
(A) the healthy plants used the food in the decomposing leaves
of the humus for energy to make chlorophyll.
(B) the humus made the soil more loosely packed, so water
penetrated more easily to the roots.
(C) the humus contained minerals such as magnesium and
iron needed for the synthesis of chlorophyll.
(D) the heat released by the decomposing leaves of the humus
caused more rapid growth and chlorophyll synthesis.
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