NEW
Font size
S
M
L
XL
WorksheetsDP Biology Unit 1 practice (Cells: 2025 syllabus)
Total questions: 25
Worksheet time: 25mins
Name
Class
Date
1.
What process allows cells to develop specialized functions?
a)
Osmosis
b)
Differentiation
c)
Active Transport
d)
Mitosis
2.
What is a primary feature of stem cells?
a)
They can divide indefinitely
b)
They specialize immediately
c)
They cannot divide
d)
They lack DNA
3.
What limits cell size and promotes differentiation?
a)
High surface area to volume ratio
b)
Low energy demand
c)
Excessive mutation rates
d)
High metabolic rates
4.
What term describes an organism made up of multiple specialized cells?
a)
Unicellular
b)
Prokaryotic
c)
Multicellular
d)
Colonial
5.
Which of the following is a key function of stem cells in multicellular organisms?
a)
Transport oxygen
b)
Divide and differentiate into specialized cell types
c)
Fight infections
d)
Store genetic material
6.
What is the main purpose of cell division?
a)
To produce energy
b)
To grow, repair, and reproduce cells
c)
To eliminate waste
d)
To generate proteins
7.
Which stage of the cell cycle involves DNA replication?
a)
Mitosis
b)
Cytokinesis
c)
Interphase
d)
Prophase
8.
What is the correct order of mitosis stages?
a)
Prophase, Metaphase, Anaphase, Telophase
b)
Anaphase, Prophase, Telophase, Metaphase
c)
Metaphase, Telophase, Anaphase, Prophase
d)
Telophase, Anaphase, Metaphase, Prophase
9.
What happens during cytokinesis?
a)
The cell divides its nucleus
b)
The cell divides its cytoplasm
c)
The cell synthesizes DNA
d)
The cell enters G0 phase
10.
What causes cancerous cell growth?
a)
Controlled cell division
b)
Uncontrolled cell division
c)
Increased osmosis
d)
Low ATP production
11.
Which structure forms the basic framework of a cell membrane?
a)
Protein channels
b)
Phospholipid bilayers
c)
Glycoproteins
d)
Carbohydrate chains
12.
What does the fluid mosaic model describe?
a)
Membrane proteins are immobile
b)
Membrane components are flexible and diverse
c)
Membranes have no permeability
d)
Membranes consist only of lipids
13.
What is a key property of the cell membrane's fluidity?
a)
It prevents temperature regulation
b)
It allows movement of lipids and proteins
c)
It limits energy storage
d)
It enhances osmosis only
14.
What is the role of glycoproteins in the cell membrane?
a)
Provide structural support
b)
Act as transport channels
c)
Enable cell-cell recognition
d)
Store energy
15.
What is a characteristic of membrane proteins?
a)
They are immobile
b)
They allow selective permeability
c)
They are made of carbohydrates
d)
They block all transport
16.
What limits cell size in terms of transport efficiency?
a)
Low surface area to volume ratio
b)
High surface area to volume ratio
c)
Selective transport
d)
Passive diffusion
17.
Which process moves molecules down their concentration gradient without energy?
a)
Active transport
b)
Facilitated diffusion
c)
Osmosis
d)
Endocytosis
18.
What is osmosis?
a)
Movement of solutes
b)
Movement of water molecules
c)
Movement of large proteins
d)
Movement of ions
19.
What type of transport requires energy to move molecules?
a)
Simple diffusion
b)
Facilitated diffusion
c)
Osmosis
d)
Active transport
20.
Which of the following is an example of selective transport?
a)
Diffusion through lipid bilayers
b)
Facilitated diffusion through protein channels
c)
Bulk flow
d)
Evaporation
21.
What does water potential measure?
a)
Energy of solutes
b)
Potential energy of water
c)
Diffusion rate
d)
Osmotic balance
22.
What happens when a plant cell is placed in a hypotonic solution?
a)
It shrinks
b)
It becomes turgid
c)
It plasmolyzes
d)
It bursts
23.
Why doesn't a plant cell burst in a hypotonic solution?
a)
It has selective permeability
b)
Its cell wall provides structural support
c)
It regulates osmosis
d)
Its vacuole stores excess water
24.
What is the medical importance of understanding tonicity?
a)
Designing isotonic solutions for IV fluids
b)
Preventing mitosis
c)
Enhancing photosynthesis
d)
Regulating body temperature
25.
What happens to a plant cell in a hypertonic solution?
a)
It becomes turgid
b)
It plasmolyzes
c)
It maintains normal shape
d)
It grows rapidly
Reset
