Question

breaks: no bathroom breaks will be permitted during the exam. answer sheet: write your name only on the answer sheet at the end of the exa do not write your name on the question pages. part i: multiple choice (2 points each, 40 points total) instructions: choose the best answer for each question and write the corresponding le (a, b, c, or d) on the line provided on the answer sheet. 1. which of the following particles carries a negative charge? a) proton b) neutron c) electron d) positron 2. what process describes the synthesis of large molecules from smaller ones? a) catabolism b) hydrolysis c) anabolism d) digestion 3. which of the following is a direct result of cellular respiration? a) production of glucose b) release of energy c) formation of oxygen d) absorption of sunlight 4. which macromolecule encodes genetic instructions? a) proteins b) lipids c) nucleic acids d) carbohydrates

Explanation:

1. Protons have a positive charge, neutrons are neutral, positrons are the antiparticles of electrons and have a positive charge, while electrons carry a negative charge.
2. Catabolism breaks down large molecules into smaller ones, hydrolysis is a reaction involving water to break bonds, and digestion is the breakdown of food. Anabolism is the synthesis of large molecules from smaller ones.
3. Cellular respiration is the process by which cells break down glucose to release energy. Glucose is consumed, oxygen is used, and sunlight is not involved in cellular respiration directly.
4. Proteins have various functions like catalysis and structural support, lipids are for energy - storage and membrane - formation, carbohydrates are for energy. Nucleic acids (DNA and RNA) encode genetic instructions.

Answer:

1. c) Electron
2. c) Anabolism
3. b) Release of energy
4. c) Nucleic Acids