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Praxis Middle School Science: Biochemistry 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 the following statements is true?

Question 2 2. What type of reaction causes the formation of sugar molecules larger than monosaccharides?

Question 3 3.

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 4 4. How many basic types of nucleic acids exist?

Question 5 5. Which of the following steps of the electron transport chain directly drives ADP phosphorylation?

Page 2

Question 6 6. How many molecules of ATP does anaerobic respiration provide?

Question 7 7. Which of the following produces the MOST ATP?

Question 8 8. Which set of functional groups is always found in sugars?

Question 9 9. Competitive inhibition involves an inhibitor

Question 10 10. How is oxygen used in cellular respiration?

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Question 11 11.

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

I. Structural support

II. Storage of information

III. Energy storage

Question 12 12. A non-substrate molecule binds to an enzyme. Now the enzyme is unable to bind its substrate. What has likely occurred?

Question 13 13. 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 14 14. Lactose is composed of a glucose molecule and a galactose molecule, therefore, lactose is classified as a _____.

Question 15 15. Which of the following bases are categorized as purines?

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Question 16 16. Why does soap remove grease from pans when we wash dishes?

Question 17 17. Why do DNA strands need to be antiparallel?

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. How are the membrane protein complexes of the electron transport chain arranged?

Question 20 20. What is the functional group that is formed when glycerol reacts with carboxylic acids to form triglycerides?

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Question 21 21. Which of the following roles do lipids NOT play in our bodies?

Question 22 22. Lawrence wants to eat a food that is high in energy before she starts training for her tennis competition. Which of the following types of food will give her the most energy per pound?

Question 23 23. Which of the following forms the backbone of a DNA molecule?

Question 24 24. Which of the following stages/processes releases carbon dioxide?

Question 25 25. An activator could have the following effect on an enzyme:

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Question 26 26.

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 27 27. All of the following statements are true, EXCEPT _____.

Question 28 28. A coenzyme is differentiated from the broader class of cofactors because it is _____.

Question 29 29. All of the following statements are true about lipids, EXCEPT that _____.

Question 30 30. Many coenzymes are derived from _____.

Praxis Middle School Science: Biochemistry 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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