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IB DP Biology Semester 1 Exam Review
Test Description: Topics 1.1 - 1.5 Topics 2.1 - 2.7
Instructions: Answer all questions to get your test result.
1) Which organelle is responisble for energy production in a cell?
A
Endoplasmic Reticulum
B
Mitochondria
C
Golgi Apparatus
D
Nucleus
2) What is the function of the Golgi apparatus in a cell?
A
packing and modifiying proteins
B
cell division
C
storage of genetic material
D
protein synthesis
3) Which organelle is involved in the synthesis of lipids and detoxification of drugs in a cell?
A
lysosome
B
peroxisome
C
vacuole
D
ribosome
4) Which organelle contains enzymes responsible for breaking down waste materials and cellular debris?
A
lysosome
B
rER
C
chloroplast
D
nucleus
5) What is the function of the vacuole in a plant cell?
A
storage of water, ions and nutrients
B
protein synthesis
C
regulation of cell growth
D
cellular respiration
6) Which of the following best describes the structure of the plasma membrane?
A
d) A network of microtubules and microfilaments
B
c) A rigid structure made of cellulose
C
b) A double layer of phospholipids with embedded proteins
D
a) A single layer of phospholipids
7) What is the function of cholesterol in the plasma membrane?
A
d) To break down waste materials in the cell
B
c) To act as recognition markers for cell-cell communication
C
a) To provide structural support and maintain membrane fluidity
D
b) To facilitate transport of molecules across the membrane
8) Which of the following structures is responsible for the selective permeability of the plasma membrane?
A
b) Cholesterol molecules
B
a) Phospholipid bilayer
C
d) Glycolipids
D
c) Integral proteins
9) When a cell is placed in an isotonic solution, what happens to the cell?
A
remains the same shape and size
B
undergoes rapid division
C
shrinks and shrivels
D
swells and burst
10) Which statement accurately describes a hypertonic solution?
A
c) The solute concentration outside the cell is higher than inside, causing water to move out of the cell.
B
d) The solute concentration outside the cell is lower than inside, causing water to move out of the cell.
C
a) The solute concentration outside the cell is higher than inside, causing water to move into the cell.
D
b) The solute concentration outside the cell is lower than inside, causing water to move into the cell.
11) Which of the following statements is NOT a part of the cell theory?
A
cells comes from pre existing cells
B
all living organisms are composed of cells
C
all cells have a nucleus
D
cells are the basic units of structure and function in living organisms
12) Which theory proposes that eukaryotic cells evolved through the engulfment and integration of smaller prokaryotic cells?
A
endosymbiotic
B
cell differentiation
C
lamarckian
D
spontaneous generation
13) According to the endosymbiotic theory, which of the following organelles is thought to have originated from an ancient symbiotic relationship between a eukaryotic host cell and an engulfed prokaryotic cell?
A
mitochrondria
B
nucleus
C
vacuole
D
golgi apparatus
14) The synthesis of urea in a laboratory setting played a crucial role in challenging which scientific concept?
A
germ theory
B
vitalism
C
cell theory
D
evolution
15) What type of bond holds the hydrogen atoms to the oxygen atom within a water molecule?
A
ionic
B
van der waals forces
C
covalent
D
hydrogen
16) What property of water allows it to moderate temperature changes and maintain a stable environment?
A
high heat capacity
B
low surface tension
C
low density
D
high vapor pressure
17) How does water's polarity contribute to its ability to dissolve many substances?
A
b) The hydrogen atoms attract electrons more than oxygen, creating partial positive and negative charges.
B
d) The oxygen atom loses electrons to the hydrogen atoms, creating a positive charge.
C
c) The oxygen atom and hydrogen atoms share electrons equally, resulting in a neutral charge.
D
a) The oxygen atom attracts electrons more than hydrogen, creating partial positive and negative charges.
18) What happens during the condensation of sugar molecules?
A
a) Sugar molecules are broken down into simpler units.
B
c) Sugar molecules react with oxygen to produce energy.
C
b) Sugar molecules combine to form a larger molecule and release water.
D
d) Sugar molecules dissolve in water to form a solution.
19) What process is involved when disaccharides are broken down into monosaccharides?
A
oxidation
B
hydrolysis
C
dehydration
D
fermentation
20) How does hydrolysis differ from condensation in terms of the sugar molecules involved?
A
a) Hydrolysis involves the combination of sugar molecules, while condensation involves their breakdown.
B
d) Hydrolysis breaks down larger sugar molecules into smaller ones, while condensation forms larger sugar molecules from smal
C
c) Hydrolysis occurs in the absence of enzymes, while condensation requires specific enzymes.
D
b) Hydrolysis releases water, while condensation consumes water.
*select an answer for all questions
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