What is the basic unit of life?

A) Atom
B) Cell
C) Organ
D) Tissue

Which of the following organelles is responsible for energy production in the cell?

A) Nucleus
B) Ribosome
C) Mitochondrion
D) Endoplasmic reticulum

Which of the following is NOT a part of the cell theory?

A) All living organisms are composed of cells.
B) The cell is the basic unit of structure and function in living organisms.
C) All cells arise from pre-existing cells.
D) Cells can form from non-living matter.

Which of the following is a characteristic of a catalyst?

a) It is consumed during the reaction.
b) It increases the activation energy.
c) It speeds up the reaction without being consumed.
d) It slows down the reaction.

Which of the following is the correct electron configuration for a sodium (Na) atom?

a) 1s² 2s² 2p⁶ 3s²
b) 1s² 2s² 2p⁶ 3s¹
c) 1s² 2s² 2p⁶ 3p¹
d) 1s² 2s² 2p⁶ 3s² 3p⁶

What is the molar mass of water (H₂O)?

a) 18.02 g/mol
b) 28.02 g/mol
c) 36.04 g/mol
d) 44.01 g/mol

Which of the following is a strong acid?

a) H₂CO₃
b) HCl
c) H₂SO₄
d) CH₃COOH

What is the pH of a neutral solution at 25°C?

a) 0
b) 7
c) 14
d) 1

Which of the following is an example of an ionic bond?

a) H₂O
b) NaCl
c) CO₂
d) O₂

What is the time complexity of binary search in a sorted array?

a) O(n)

b) O(log n)

c) O(n^2)

d) O(1)