Form 1:
The Cell Kcse questions

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1. Which organelle would be abundant in?

Skeletal muscle cell

mitochondrion

Palisade cell

chloroplast

2. State the functions of the following organelles.

Lysosomes

Destroying old and worn out organelles

Golgi apparatus

i) They package and transport glycoproteins.
ii) They are involved in secretion of synthesized proteins and carbohydrates.
iii) They manufacture lysosomes.

3. State the functions of the following organelles;

Golgi apparatus

i) They package and transport glycoproteins.
ii) They are involved in secretion of synthesized proteins and carbohydrates.
iii) They manufacture lysosomes.

Ribosomes cell

They form sites for protein synthesis.

4. Name the organelles that perform each of the following functions in a cell.

Protein synthesis

Ribosomes

Transport cell secretions

Endoplasmic reticulum

5. The diagram below represents a cell.

a) Name the parts labeled x and y

X

Chloroplasts

Y

Vacuole

b) Suggest why the structures labeled x would be more on one side than the other side.

In dim light. They move to the upper part of the cell in order to receive enough sunlight for photosynthesis.

6. a) State the function of cristae in mitochondria (1mk)

Increase surface area for attachment of respiratory enzymes hence increasing rate of respiration.

b) The diagram below represents a cell organelle

(i) Name the part labeled Y (1mk)

Stroma

(ii) State the function of the part labeled X (2 mks)

Absorb sunlight used for light stage of photosynthesis

7 a) What is the formula for calculating linear magnification of a specimen when using a hand lens? (1mk)

Drawing magnification=length of the drawing/length of the actual object.

b) Give a reason why staining is necessary when preparing specimens for observation under the microscope. (1mk)

It is adding a dye to the specimen to make the features clearer and distinguishable

8. State three functions of Golgi apparatus. (3mks)

i) They package and transport glycoproteins.
ii) They are involved in secretion of synthesized proteins and carbohydrates.
iii) They manufacture lysosomes.

9. Name two structures found in plant cell but are absent in animals cell.

i) Cell wall
ii) Large vacuole
iii) Chloroplast
iv) Starch granules

10. Write the role of the following parts of a microscope

i) Mirror

Reflects light through the condenser to the object on the stage

ii) Diaphragm

An aperture that regulates the amount of light passing through the condenser to illuminate the specimen

iii) Fine adjustment knob

Raises or lowers the body tube through smaller distances to bring the image into sharper focus. It is mostly used with the high power objective lens

11. 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)

1 mm = 1000μm
3.5 mm = 3500 μm
10 cells = 3500 μm
1 cell = 3500/10 μm
1 cell = 350 μm

12. Define the following

i) Tissue

Made of several specialized cells grouped together and perform particular function.

ii) Organ

Made of a group of specialized tissues grouped together performing a particular function.

iii) Organ system

It is made of several organs that perform a particular function.
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