Biochemistry Exam 1 (Multiple Choice + Formulas) Questions with Complete Solutions (Latest 2025) Approximately what percentage of the human genome encodes for protein? - Correct Answers ✅3% What pairs of atoms in bases are involved in hydrogen bonds?
- N-H and O-H
- N-H and S-H
- O-H and P-O
- All of the above
- None of the above - Correct Answers ✅A) N-H and O-H
- a double helix
- the sugar phosphate backbone aligned in the center of the
- the base pairs that are stacked on the inside of the double
- A and B
- A and C - Correct Answers ✅E) A and C
The structure of DNA described by Watson and Crick included
helix
helix
What two properties of water are important for biological interactions? - Correct Answers ✅The polarity of water The cohesive properties of water 1 / 2
Biochemistry Exam 1 (Multiple Choice + Formulas) Questions with Complete Solutions (Latest 2025) How many hydrogen bonds are formed between A and T? - Correct Answers ✅2 What gives proteins a dominant role in biochemistry? - Correct Answers ✅Their ability to spontaneously fold into complex three-dimensional structures Which of the following is considered a noncovalent bond?
- Electrostatic interactions
- Hydrogen bonds
- Van der Waals interactions
- All of the above
- None of the above - Correct Answers ✅D) All of the
- / 2
above The First Law of Thermodynamics states what? - Correct Answers ✅The total energy of a system and its surroundings is constant The Second Law of Thermodynamics states what? - Correct Answers ✅The total entropy of a system and its surroundings always increases for a spontaneous process