4. Scientists today can synthesize new genes in the laboratory and insert them into living organisms where they are translated into proteins that change the nature of those organisms. What do these scientists know about the structure of genes that allows them to predict the proteins that the engineered organisms will produce?

the answer is a or when it says crossing over

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lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !