5372122IntrotoDNAhomework.pdf

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Question Title: Structure of DNA/Base Pairing(easy)

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Name: Date: Class: Structure of DNA/Base Pairing (Honors: 35 points; Standard: 25 points) Label the diagram below using the following choices (6 pt) Nucleotide, deoxyribose, phosphate group, nitrogen base, hydrogen bonds, base pair Complete each statement. 7. ______________, guanine (G), cytosine (C), and thymine (T) are the four _____________________ in DNA. (2 pt) 8. In DNA, ___________________ always forms ________________________ bonds with guanine (G). (2 pt) 9. The sequence of ________________________ carries the genetic information of an organism. (1 pt) 10. The process of ____________________________ produces a new copy of an organism’s genetic information, which is passed on to a new cell. (1 pt) 11. DNA synthesis occurs during ____________________ of interphase. (1 pt) 12. The double-coiled shape of DNA is called a ____________________ _____________________. (1 pt) Name: Date: Class: Base Pairing 13. Four nucleotides make up DNA: adenine, cytosine, guanine, and thymine. These nucleotides always occur in pairs called base pairs. Write the missing letter to complete each base pair. The first two have been done for you. (4 pt) Use Chargaff’s Rules to predict the bases’ percentage in each of the following DNA situations 14. 36% Adenine , _______% Thymine (1 pt) 15. 22% Cytosine , ______ % Guanine (1 pt) 16. 24% Guanine , _______% Cytosine, _____% Adenine, 26% Thymine (2 pt) 17. _____% Adenine, _______% Cytosine, _____% Thymine, 18% Guanine (3 pt) Name: Date: Class: REQUIRED FOR HONORS; EXTRA CREDIT FOR STANDARD: In each of the following pictures, identify at least one thing that is wrong with each image and describe why the image is incorrect. (2 pts each) 18. 19. 20. 21. 22. Draw and describe what it means for a DNA molecule to be antiparallel. (2 pt)