How do enzymes speed up chemical reactions?

they lower the activation energies of reactions.

they react with substrates to form new compounds.

they raise the activation energies of reactions.

they react with products to form new compounds.

-They lower the activation energies of reactions.

Explanation:

Enzymes can be defined as biocatalysts that enhances rate of reactions, without being changing themselves in overall process.

They show enormous catalytic power and increase reaction rate by decreasing the activation energy required for the reaction. The energy required to lower the activation energy comes from the binding energy, released due to the interactions between substrate and enzyme.

Thus, the correct answer is 'first option.'

explanation:

1 rosales   order

2 eurarya   domain

3 rosaceae   family

4 cania - genus

5 plantae - kingdom

6 magnoliopsida - class

7 rosa - species

8 magnoliophyta - phylum

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: