AP Biology - Biochemistry Exam Latest Update 2024/2025 30 Questions

1. There are 20 different amino acids in the proteins that make up the tissues of living organisms. The primary difference between these amino acids is in their: A. R or variable groups. B. Number of potassium groups C. Number of phosphate groups D. Number of asymmetric carbons. A 2. The nitrogenous base, adenine, is found in which three of the following? A. Proteins, chlorophyll, and vitamin A. B. Protein, ATP, and DNA. C. ATP, DNA, and RNA. D. Chlorophyll, ATP and DNA C 3. A feature of organic compounds NOT found in inorganic compounds is the presence of A. Ionizing chemical groups B. Electrons C. Carbon atoms covalently bonded to each other. D. Oxygen C 4. Which of the following is a correct statement about the relationship between pH and the hydrogen ion concentration of a solution? A. There are no hydrogen ions present in a solution with a basic pH. B. There are no hydrogen ions present in a solution with a neutral pH of 7.0. C. The concentration of hydrogen ions in a solution with a pH of 7.0 is 100 times as great as that in a solution with a pH of 9.0. D. The concentration of hydrogen ions in a solution with a pH of 5.0 is twice as great as that in a solution with a pH of 3.0. C 5. Which of the following pairs of functional groups characterizes the structure of an amino acid? B 6. The bonding of two amino acid molecules to form a larger molecule requires A. the release of a water molecule B. the release of a carbon dioxide molecule C. the addition of a nitrogen atom D. the addition of a water molecule A We have an expert-written solution to this problem! 7. Animals produce most of their nitrogen-containing wastes during A. protein digestion B. carbohydrate digestion C. lipid digestion D. glycogen synthesis A 8. Which of the following is responsible for the cohesive property of water? A. Hydrogen bonds between the oxygen atoms of two adjacent water molecules B. Covalent bonds between the hydrogen atoms of two adjacent water molecules C. Hydrogen bonds between the oxygen atom of one water molecule and a hydrogen atom of another water molecule D. Covalent bonds between the oxygen atom of one water molecule and a hydrogen atom of another water molecule C We have an expert-written solution to this problem! Directions: Each group of questions in this section consists of five lettered choices followed by a list of numbered phrases or sentences. For each numbered phrase or sentence select the one heading that is most closely related to it and fill in your choice in the blank. Each lettered choice may be used once, more than once, or not at all in each group. For Questions 9-12, refer to the following list of biomolecules. A. Proteins B. Carbohydrates C. Nucleic Acids D. Lipids E. Steroids