Biology:
1. Which of the following is NOT a characteristic of prokaryotic cells?
A) They lack a nucleus
B) They have a cell wall
C) They have membrane-bound organelles
D) They have circular DNA
Answer: C) They have membrane-bound organelles
2. Which of the following is the control center of the cell, containing DNA?
A) Mitochondrion
B) Vacuole
C) Nucleus
D) Ribosome
Answer: C) Nucleus
3. Which of the following is the process through which plants produce food?
A) Respiration
B) Photosynthesis
C) Transpiration
D) Excretion
Answer: B) Photosynthesis
Chemistry:
4. Which of the following is NOT an alkali metal?
A) Lithium
B) Potassium
C) Sodium
D) Carbon
Answer: D) Carbon
5. What is the chemical symbol for gold?
A) Ag
B) Au
C) Fe
D) Hg
Answer: B) Au
6. What type of bond is formed between two atoms that share one or more pairs of electrons?
A) Ionic
B) Covalent
C) Hydrogen
D) Metallic
Answer: B) Covalent
Physics:
7. Which of the following is NOT a vector quantity?
A) Acceleration
B) Speed
C) Temperature
D) Force
Answer: C) Temperature
8. What is the SI unit for measuring energy?
A) Kelvin
B) Pascal
C) Joule
D) Newton
Answer: C) Joule
9. Which law states that the force exerted by a gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them?
A) Newton's First Law
B) Newton's Third Law
C) Newton's Second Law
D) Law of Universal Gravitation
Answer: D) Law of Universal Gravitation
General Knowledge:
10. Who authored the famous novel "To Kill a Mockingbird"?
A) J.R.R. Tolkien
B) Harper Lee
C) Ernest Hemingway
D) William Shakespeare
Answer: B) Harper Lee
11. Which country hosted the 2016 Summer Olympics?
A) United States
B) China
C) Brazil
D) Russia
Answer: C) Brazil
12. Who was the first African-American President of the United States?
A) George W. Bush
B) Barack Obama
C) John F. Kennedy
D) Abraham Lincoln
Answer: B) Barack Obama
Please note that these answers are based on the model paper provided. There might be variations or other correct options in the actual MCAT exam.