1) What is the backbone of DNA made of? a) Sugar-phosphate b) Nitrogen bases c) Hydrogen bonds d) Proteins 2) Which bases pair together in DNA? a) A-T, C-G b) A-C, G-T c) A-G, C-T d) A-A, C-C 3) What is the monomer of DNA? a) Nucleotide b) Amino acid c) Protein d) Lipid 4) Why is DNA replication important? a) Cell division b) Energy storage c) Protein synthesis d) Waste removal 5) What shape is DNA? a) Double helix b) Single strand c) Triple helix d) Circular 6) What does antiparallel mean in DNA? a) Opposite directions b) Same direction c) Parallel lines d) Intersecting lines 7) Who discovered the DNA structure? a) Watson & Crick b) Newton & Einstein c) Darwin & Mendel d) Bohr & Curie 8) What did Rosalind Franklin contribute to DNA? a) X-ray images b) DNA sequencing c) Protein synthesis d) Genetic engineering 9) What are genes? a) DNA segments b) Proteins c) Lipids d) Carbohydrates 10) What are chromosomes? a) DNA structures b) RNA strands c) Protein chains d) Lipid layers 11) How are genes and chromosomes related? a) Genes on chromosomes b) Genes in lipids c) Chromosomes in proteins d) Genes in RNA 12) What bonds hold DNA bases together? a) Hydrogen bonds b) Covalent bonds c) Ionic bonds d) Metallic bonds 13) What is the role of DNA? a) Genetic information b) Energy production c) Waste removal d) Structural support 14) What is the significance of the double helix? a) Stability and replication b) Energy storage c) Protein synthesis d) Cell division 15) What is the importance of nitrogenous bases? a) They contain genetic information b) They provide structure to the molecule c) They hold hydrogen bonds d) They are made of nitrogen 16) Why is the DNA after replication considered semiconservative? a) Because it does not allow new information b) Because in each copy one strand is new and the other is old c) Because the two new strands are parent d) Because the two new strands are daughters 17) What is the nitrogen base A? a) Avenine b) Adenine c) Answerine d) Averine 18) What does Adenine pair with in DNA Replication? a) Cytosine b) Guanine c) Thymine d) Adenine 19) What is the name of the nitrogen base C? a) Cytoplasm b) Cytokinesis c) Cyprosin d) Cytosin 20) What does Cytosine pair with? a) Guanine b) Adenine c) Thymine d) Cytosin 21) If a DNA has 22% of Guanine, what is the percentage for Cytosine? a) 78% b) 22% c) 44% d) 56% 22) The complementary strand for 5` ATGGTCCAATC 3` is a) 5` ATGGTCCAATC 3` b) 5` TACCAGGTTAG 3` c) 3` TACCAGGTTAG 5` d) 3` TACGACGATAG 5` 23) What are the steps in DNA replication? a) 1. DNA unwinds 2. The strands unzip 3. New base pairing 4. Sealing of new bases in place b) 1. Preparation of new bases 2. The strands unzip 3. DNA untwists 4. Sealing of new bases in place c) 1. Unzipping 2. Untwisting 3. Base Pairing 4. Sealing

DNA Structure and Function Quiz

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