BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Double-stranded DNA and RNA, and DNA/RNA hybrids form naturally in cells between two nucleic acid strands containing complementary sequences.

Detailed explanation-2: -Human cells contain natural double-stranded RNAs with potential regulatory functions.

Detailed explanation-3: -The DNA in humans is double-stranded. The two DNA strands are in opposition to one another. Hydrogen bonds bind the nitrogenous bases of the two strands together. Guanine pairs with cytosine, while adenine pairs with thymine.

Detailed explanation-4: -DNA uses thymine and deoxyribose sugar, while RNA uses uracil and ribose sugar. While DNA is usually molded into a double-stranded helix, RNA is usually single-stranded, which allows for the binding of anticodons during translation.

Detailed explanation-5: -Unlike DNA, however, RNA is most often single-stranded. An RNA molecule has a backbone made of alternating phosphate groups and the sugar ribose, rather than the deoxyribose found in DNA.