a) Diffusion is the movement of molecules from a region of high concentration to a region of low concentration
b) i) The higher the diffusion gradient (difference in concentration between two points/ regions) the higher the rate of diffusion while the lower the diffusion gradient the lower the rate of diffusion
ii) The higher the surface area to volume ratio, the faster is the rate of diffusion, while the lower the ratio, the slower the rate of diffusion.
iii) Increasing temperature increases energy content in a molecule hence faster rate of diffusion.
johnmulu answered the question on April 28, 2017 at 13:40
- Why is oxygen important in the process of active transport in cells? (Solved)
Why is oxygen important in the process of active transport in cells?
Date posted: April 28, 2017. Answers (2)
- Explain what would happen to a red blood cells if they are placed in a concentrated salt solution(Solved)
Explain what would happen to a red blood cells if they are placed in a concentrated salt solution
Date posted: April 28, 2017. Answers (1)
- State the functions of the following parts of a light microscope.
a) Objective lens
b) Diaphragm
(Solved)
State the functions of the following parts of a light microscope.
a) Objective lens
b) Diaphragm
Date posted: April 28, 2017. Answers (1)
- a) State two advantages of using a coverslip when preparing a specimen for observation under a light microscope.
b) How is the low power objective lens manipulated to focus a specimen for observation under a light microscope?
(Solved)
a) State two advantages of using a coverslip when preparing a specimen for observation under a light microscope.
b) How is the low power objective lens manipulated to focus a specimen for observation under a light microscope?
Date posted: April 28, 2017. Answers (1)
- State one function of each of the following cell organelles:
(Solved)
State one function of each of the following cell organelles:
a) Golgi bodies
b) Lysosomes.
Date posted: April 28, 2017. Answers (1)
- A student drew a 6 cm long diagram of a plant flower. If the actual length of the flower was 12 cm, calculate the magnification of the drawing made by the student. Show your working(Solved)
A student drew a 6 cm long diagram of a plant flower. If the actual length of the flower was 12 cm, calculate the magnification of the drawing made by the student. Show your working
Date posted: April 28, 2017. Answers (1)
- State one way in which each of the following is structurally adapted to its function:
a) neurone;
b) Mitochndrion.
(Solved)
State one way in which each of the following is structurally adapted to its function:
a) neurone;
b) Mitochndrion.
Date posted: April 28, 2017. Answers (1)
- Name the organelle that is involved in each of the following(Solved)
Name the organelle that is involved in each of the following
a) Manufacture of lipids
b) Formation of lysosomes
Date posted: April 28, 2017. Answers (1)
- a) Name the part of a light microscope used to bring an image of a specimen into sharp focus.
b) Why is it recommended to keep the stage of the microscope dry?
(Solved)
a) Name the part of a light microscope used to bring an image of a specimen into sharp focus.
b) Why is it recommended to keep the stage of the microscope dry?
Date posted: April 28, 2017. Answers (1)
- The figure below is a fine structure of a generalized animal cell as seen under an electron microscope.(Solved)
The figure below is a fine structure of a generalized animal cell as seen under an electron microscope.
a) Name the parts labeled A and B.
b) How the is structure labeled B adapted to its function?
Date posted: April 28, 2017. Answers (1)
- Give reasons for carrying out the following procedures when preparing temporary wet mounts of plant tissues(Solved)
Give reasons for carrying out the following procedures when preparing temporary wet mounts of plant tissues
a) Making thin plant sections.
b) Adding water on the plant section.
c) Placing a cover slip over the plant section.
Date posted: April 28, 2017. Answers (2)
- State the functions of the following parts of a light microscope.(Solved)
State the functions of the following parts of a light microscope.
Fine adjustment knob
Stage
Date posted: April 27, 2017. Answers (1)
- The diagram below shows a specified plant cell(Solved)
The diagram below shows a specified plant cell
a) i) Name the cell.
ii) Name the parts labeled D and E
b) State the function
Date posted: April 27, 2017. Answers (1)
- State the function of the following cell organelles
(Solved)
State the function of the following cell organelles
a) Ribosome
b) Lysosomes
Date posted: April 27, 2017. Answers (1)
- State two functions of the endoplasmic reticulum(Solved)
State two functions of the endoplasmic reticulum
Date posted: April 27, 2017. Answers (1)
- State three functions of Golgi apparatus.(Solved)
State three functions of Golgi apparatus.
Date posted: April 27, 2017. Answers (1)
- Plant cells do not burst when immersed in distilled water. Explain(Solved)
Plant cells do not burst when immersed in distilled water. Explain
Date posted: April 27, 2017. Answers (1)
- What is the formula for calculating linear magnification of a specimen when using a hand lens(Solved)
a) What is the formula for calculating linear magnification of a specimen when using a hand lens
b) Give a reason why staining is necessary when preparing specimens for observation under the microscope.
Date posted: April 27, 2017. Answers (1)
- State the function of the organelles(Solved)
State the function of the organelles
a) lysosomes
b) Golgi apparatus
Date posted: April 27, 2017. Answers (1)
- Name the organelle in which protein synthesis takes place.(Solved)
Name the organelle in which protein synthesis takes place.
Date posted: April 27, 2017. Answers (1)