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TExES Science 7-12: Nucleic Acids & Enzymes Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. Which of these statements isn't true?

Question 2 2.

Which of the following are ways in which RNA is different than DNA:

I. Single-stranded

II. Ribose

III. Uracil

Question 3 3. Competitive inhibition involves an inhibitor

Question 4 4.

Which of the following is a primary function of a nucleic acid?

I. Structural support

II. Storage of information

III. Energy storage

Question 5 5. Which of the following is NOT true of a noncompetitive inhibitor?

Page 2

Question 6 6.

Which of the following are reasons why RNA is generally less stable than DNA?

I. Fewer hydrogen bonds

II. Prevalence of proteins that can degrade RNA

III. Fewer -OH groups in the sugar of RNA

Question 7 7. Which of the following is NOT one of the nitrogenous bases found in DNA?

Question 8 8. Iron binds tightly to the heme group in the protein hemoglobin. What type(s) of helper molecule would this be considered?

Question 9 9. What type of bond is often formed between prosthetic groups and proteins?

Question 10 10. How many basic types of nucleic acids exist?

Page 3

Question 11 11. Which of the following nitrogenous bases is NOT found in RNA?

Question 12 12. What does DNA stand for?

Question 13 13. A coenzyme is differentiated from the broader class of cofactors because it is _____.

Question 14 14. Which of the following is NOT true of enzyme regulation?

Question 15 15. A non-substrate molecule binds to an enzyme. Now the enzyme is unable to bind its substrate. What has likely occurred?

Page 4

Question 16 16. DNA consists of four different nitrogenous bases, which are:

Question 17 17. Which of the following statements is true?

Question 18 18. The sugar end of the DNA strand is referred to as the _____ end and the phosphate end is referred to as the _____ end.

Question 19 19.

The following concepts led to the hypothesis that DNA has a double helix structure:

I. The ratio of A:T is 1:1.

II. The ratio of G:C is 2:1

III. DNA strands are antiparallel

Question 20 20. Which of the following statements is true?

Page 5

Question 21 21. Which of the following bases are categorized as purines?

Question 22 22. Which of the following scientists are credited with discovering the structure of DNA?

Question 23 23. Why do DNA strands need to be antiparallel?

Question 24 24. An activator could have the following effect on an enzyme:

Question 25 25. A nucleic acid monomer is called:

Page 6

Question 26 26. Many coenzymes are derived from _____.

Question 27 27. Which of the following forms the backbone of a DNA molecule?

Question 28 28. A phosphodiester bond links:

Question 29 29. Cellular respiration includes a step that converts pyruvate into Acetyl coA. Acetyl coA is also known as Coenzyme A. This implies that Acetyl coA _____.

Question 30 30. Which of the following statements is true?

TExES Science 7-12: Nucleic Acids & Enzymes Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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