Name the organelles that perform each of the following functions in a cell.
Transport cell secretions
The diagram below represents a cell.
Name the parts labeled x and y
Suggest why the structures labeled x would be more on one side than the other side.
State the function of cristae in mitochondria (1mk)
The diagram below represents a cell organelle
Name the part labeled Y (1mk)
State the function of the part labeled X (2 mks)
What is the formula for calculating linear magnification of a specimen when using a hand lens? (1mk)
Give a reason why staining is necessary when preparing specimens for observation under the microscope. (1mk)
State three functions of Golgi apparatus. (3mks)
Name two structures found in plant cell but are absent in animals cell.
Write the adaptation and role of the following cells.
Root hair cell
Red blood cell
The diameter field of view of a light microscopic is 3.5mm. Plant cells lying of the diameter are 10. Determine the size of one cell microns (1mm = 1000μm)
Define the following
Name the organelles that perform each of the following functions:
Digestion and destruction of worn out organelles.
Explain why the following processes are important during the preparation of temporary slides
Use of a sharp cutting blade
In a class experiment to establish the size of an onion cell, a leaner observed the following on the microscope field of view of 4mm. If the student counted 20 cells across the diameter of this field of view, calculate the size of one cell in micrometers.
State the functions of the following cell organelles:
What is the of nucleus of a cell made up of?
In a laboratory exercise a student observing a drop of pond water under a microscope saw and drew a spirogyra. If the magnification of the eye-piece was x5 and that of the objective lens was x100, what was the magnification of the spirogyra?
If the spirogyra has a length of 5cm at the above magnification, calculate the actual length in micrometers
Identify the organelle shown below:-
How is the organelle you have identified in (a) above suited to its function
Identify the structures of the cells that perform the following functions:-
Regulate exchange of substances in and out of the nucleus
State the roles of enzyme catalase in living cells
Which factor inactivates enzyme?
The figure below represents a certain cell organelle:-
Identify the cell organelle
What is the function of the part labelled A
Name the organelles that perform each of the following functions;
Osmoregulation in amoeba
Carries out digestion and destruction of worn out cell organelles
State three properties of the cell membrane
The diagram below represents a plant cell
Name a carbohydrate which forms part of the structure labelled S
State two functions of the part labelled R
Name two structures present in the diagram but absent in the animal cell
What do you understand by the following terms
State the function of the following parts of a cell
What is the formula for calculating linear magnification of a specimen when using a hand lens
State the function of the following cell structures:-
What is the main structural component of:-
The diagram below represents a cell
Name parts labelled X and Y
Suggest why the structures labelled X would be more on one side than the other
During a practical class, form fours estimated the field of view to be 3.5mm. Using the low power objective, they observed spirogyra cells across the same field of view and counted 8cells. Calculate the size of each cell and give your answer in micrometer.
Distinguish between the following terms :-
Magnification and resolution of a microscope
Mounting and staining of a specimen
Name the organelle that performs each of the following functions in a cell.
Transport of packaged glycoproteins
Destruction of worn out cell organelles
Synthesis of proteins
Why are the following procedures done when preparing sections to be observed under a light microscope?
Making of thin sections
Using a sharp blade to make the sections
What are the functions of the following parts of a light microscope?
Eye piece lens
Given that the diameter of the field of view of a light microscope is 2000um. Calculate the size of a cell in mm if 10 cells occupy the diameter of the field of view
State the importance of the following processes in microscopy:
A cell was found to have the following under a light microscope; cell membrane, irregular in shape, and small vacuoles. Identify the type of the cell above
State the functions of the following organelles;
State the functions of each of the following parts in a microscope.
The eye piece lens
The objective lens
The figure below represents an electron micrograph of an organelle that is found in many cells;
Identify the organelle
State the function of the organelle
What is the importance of infoldings in the inner membrane.
Give two examples of tissues where you would expect many such organelles in animal body.
Destroying old and worn out organelles
Rough endoplasmic reticulum
X- chloroplasts Y - Vacuole
In dim light. They move to the upper part of the cell in order to receive enough sunlight for photosynthesis
Increase surface area for attachment of respiratory enzymes hence increasing rate of respiration.
Absorb sunlight used for light stage of photosynthesis
Drawing Magnification = Length of the drawing/Length of the object
It is adding a dye to the specimen to make the features clearer and distinguishable.
Form vesicles that transport materials to other parts of the cell e.g. proteins
Transport secretions to the cell surface for secretion e.g. enzymes and mucus.
They form lysosomes
Presence of dendrites to receive impulses
Presence of chloroplasts to trap sunlight
Elongated and no cuticles in order to absorb water
Biconcave shape to increase surface area for diffusion of oxygen/haemoglobin.