The cell - SS1 Biology Past Questions and Answers - page 1
_________ is the basic structural and functional unit of all living organisms
egg
cytoplasm
cell
_________ separates the internal cellular components from the external environment.
lysosomes
cell membrane
vacuoles
__________ is referred to as the control center of the cell.
nucleus
cell wall
mitochondria
Who was the first scientist to coin the term ‘cell’?
Robert Hooke
Rudolf Virchow
Antonie van Leeuwenhoek
Which of the following is a principle of cell theory
Cells are the basic units of structure and function
All living organisms are composed of cells
all the above
A _________ is a scientific instrument used to observe and magnify small objects or structures that are not visible to the naked eye
voltmeter
thermometer
1. telescope
Paramecium exists in what form?
independent single-celled organism
a colony
a filament
1. What is the difference between light and electron microscopes?
Light microscopes use visible light to illuminate the specimen and produce an image whilst electron microscopes use a beam of electrons instead of light to visualize specimens.
1. State the organelles of a cell; indicate if it is unique to plants, animals, or both; and their functions in a tabular form.
|
ORGANELLE |
PLANT CELL/ANIMAL CELL/BOTH |
FUNCTION |
|
Cell wall |
Plant Cell |
Supports the cell |
|
Cell Membrane |
Both |
Controls what comes in and goes out of the cell |
|
Cytoplasm |
Both |
Houses cell organelles |
|
Nucleus |
Both |
Controls cell activities |
|
Mitochondria |
Both |
Breaks down molecules to produce energy |
|
Ribosomes |
Both |
Produces proteins |
|
Golgi Body |
Both |
Distributes materials in the cell |
|
Lysosomes |
Both |
Breaks down large food particles |
|
Vacuoles |
Both |
Cell storage area |
|
Chloroplast |
Plant Cell |
Captures energy from sunlight and produces food for the cell |
|
Endoplasmic Reticulum |
Both |
Moves materials within the cell |