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DNA & RNA - ORELA Middle Grades General Science 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. A nucleic acid monomer is called:

Question 2 2.

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

I. Structural support

II. Storage of information

III. Energy storage

Question 3 3. Which of the following statements is true?

Question 4 4.

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

I. Single-stranded

II. Ribose

III. Uracil

Question 5 5. Which of these statements isn't true?

Page 2

Question 6 6. DNA consists of four different nitrogenous bases, which are:

Question 7 7. Which of the following forms the backbone of a DNA molecule?

Question 8 8. Which of the following bases are categorized as purines?

Question 9 9. Why do DNA strands need to be antiparallel?

Question 10 10. Which of the following nitrogenous bases is NOT found in RNA?

Page 3

Question 11 11. The sugar end of the DNA strand is referred to as the _____ end and the phosphate end is referred to as the _____ end.

Question 12 12.

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 13 13. What does DNA stand for?

Question 14 14.

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 15 15. A phosphodiester bond links:

Page 4

Question 16 16. Which of the following statements is true?

Question 17 17. How many basic types of nucleic acids exist?

Question 18 18. Which of the following is NOT one of the nitrogenous bases found in DNA?

Question 19 19. Which of the following statements is true?

Question 20 20. Which of the following scientists are credited with discovering the structure of DNA?

DNA & RNA - ORELA Middle Grades General Science 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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