Question

dna
where is it found?
structure:
nucleotides consist of:
-
-
-
base pairing:

Explanation:

1. Where is it found?: DNA is located in the nucleus of eukaryotic cells (as nuclear DNA), in mitochondria (as mitochondrial DNA), and in the cytoplasm of prokaryotic cells (since they lack a nucleus).
2. Structure: DNA is a double-stranded helix, with two polynucleotide strands running antiparallel to each other, held together by hydrogen bonds between complementary nitrogenous bases.
3. Nucleotides consist of: Nucleotides, the building blocks of DNA, have three core components: a deoxyribose (5-carbon sugar) molecule, a phosphate group, and a nitrogen-containing base (adenine, thymine, guanine, or cytosine).
4. Base pairing: DNA follows complementary base pairing rules: adenine (A) forms hydrogen bonds only with thymine (T), and guanine (G) forms hydrogen bonds only with cytosine (C).

Answer:

1. Where is it found?

• In the nucleus of eukaryotic cells; in the cytoplasm of prokaryotic cells; also in mitochondria (mitochondrial DNA)

1. Structure:

• Double-stranded antiparallel helix made of polynucleotide chains

1. Nucleotides consist of:

• Deoxyribose (5-carbon sugar)
• Phosphate group
• Nitrogenous base (A, T, G, C)

1. Base pairing:

• Adenine (A) pairs with Thymine (T); Guanine (G) pairs with Cytosine (C)