Question

6 multiple choice 1 point what are enzymes? the basic building block of nucleic acids like dna and rna a substance which slows down or prevents a particular chemical reaction or other process a chemical reaction where two molecules join together by removing a water molecule proteins that act as biological catalysts to speed up chemical reactions in living organisms 7 fill in the blank 1 point

Explanation:

1. Analyze the first option: The basic building blocks of nucleic acids (DNA/RNA) are nucleotides, not enzymes. So this is incorrect.
2. Analyze the second option: A substance that slows down or prevents a reaction is an inhibitor, not an enzyme. Enzymes speed up reactions. So this is incorrect.
3. Analyze the third option: The process described (two molecules joining by removing water) is dehydration synthesis, not a definition of an enzyme. So this is incorrect.
4. Analyze the fourth option: Enzymes are proteins (or in some cases RNA, but mostly proteins) that act as biological catalysts to increase the rate of chemical reactions in living organisms. This matches the correct definition of enzymes.

Answer:

D. proteins that act as biological catalysts to speed up chemical reactions in living organisms (assuming the last option is labeled D; if the options were labeled differently, adjust the identifier accordingly, but based on the order, the last option is the correct one with the text "proteins that act as biological catalysts to speed up chemical reactions in living organisms")