DNA Structure and Replication Study Guide

What type of macromolecule is DNA? carbohydrate lipid protein nucleic acid DNA is made up of repeating units called amino acids nucleotides lipids Match the complementary base pairs. Adenine Thymine Guanine Cytosine The blue square represents a nucleotide nitrogen base deoxyribose phosphate group X is a sugar. What type of sugar is found in DNA? ribose deoxyribose glucose adenine What nitrogen base would be found at the 'Y'? adenine thymine guanine cytosine True or False: The backbone of the DNA molecule (the outside) is made up of repeating sugar and phosphate groups. True False True or False: Hydrogen bonds are formed between complementary base pairs. True False Match the enzyme with the correct function. DNA helicase Breaks the hydrogen bonds between nitrogen bases. DNA polymerase Adds complementary base pairs to build a new strand and proofreads. Which of the following is a nucleotide found in DNA? ribose + phosphate group + thymine ribose + phosphate group + uracil deoxyribose + phosphate group + uracil deoxyribose + phosphate group + cytosine DNA replication results in two DNA molecules, each with two new strands of DNA. each with two original strands of DNA. each with one new strand and one original strand of DNA. one with two new strands and the other with two original strands of DNA. Match the scientist(s) with their contribution to our understanding of a DNA molecule. Erwin Chargaff Rules of base pairing (A pairs with T and G pairs with C) Rosalind Franklin x-ray photograph that was used to determine that DNA was twisted. James Watson and Francis Crick Figured out that DNA was double stranded and that the two strands run anti-parallel to one another. Click on the blanks to fill in the missing words. Re-read your answers to make sure they make sense when you are done. DNA is double stranded and the two strands run anti-parallel to each other. The nitrogen bases are in the "middle" of the DNA molecule and the sugar groups are on the "sides" of the molecule. The process of copying DNA is known as DNA replication. This occurs during the S phase of the cell cycle. DNA codes for proteins and is found in the nucleus of the eukaryotic cells. Fill in the "complementary strand of DNA" by adding an A, T, C, or G in the blank bases. **Only use A, T, C, or G...do not write it the full name or it will mark it incorrect.** C T G T A