Where do cells get the chemicals needed to synthesize other molecules?
it is transcribed by the messenger rna
they "borrow" it from the dna
from the food they take in
from h2o

from the food they take in

The chemicals needed to produce molecules comes from the food which an organism eat. A food is a rich source of fats, oils, proteins, carbohydrates and vitamins which are required by the cells to produce functional molecules necessary for building the body and maintaining it's proper functioning.

tube or goog will be great resources to find the answer to the question that you're asking

this means that the temperature of both substances will be equal