B1 Cells Flashcards
This test is on Microscopy, scale diagrams, cells and cell contents. You need to be familiar with page 1-2 of 'Ard Facts.
In a plant cell, what is the function of the chloroplasts?
Chloroplasts make food for the plant (by photosynthesis).
The part of an animal cell that controls which chemicals enter and leave the cell is the…
Cell surface membrane
Suggest two ways of improving the visibility of a specimen being viewed under a microscope.
Make the specimen as thin as possible. Use a stain. Use plenty of light. Use a high power objective lens.
In a plant cell, what is the function of the vacuole?
The vacuole is a permanent fluid-filled section (in plant cells only).
In a plant cell, what is the function of the cell wall?
It provides strength and structure for the cell (in plant cells only).
Methylene blue stain is used to observe…
Nuclei show up blue when stained with methylene blue. (nuclei is plural for nucleus)
Explain how genes enable human characteristics to be passed on from generation to generation.
Cells contain genes from both parents. These genes provide the characteristics so a human has a mix of characteristics from each parent (or grandparent, etc).
In an animal several tissues may be combined to form…
Organs
For example, the heart is made of special muscle tissue.
If the eyepiece of a microscope has a magnification of x5 and the objective lens has a magnification of x10, the total magnification is…
x50
(x5 times x10 is x50)
In a cell, what is the function of the nucleus?
It stores the genes which control the production of protein.
Name two parts of a plant cell that you would not expect to find in an animal cell.
Animal cells do not have chloroplasts, a vacuole or a cell wall.
Name two things you would expect to find in every living cell.
Every cell has a nucleus, cytoplasm and cell membrane. (red blood cells don’t have a nucleus)
The nucleus of a cell contains…
Genes
Genes are made of DNA
In a cell, what is the function of the cell surface membrane?
It surrounds the cytoplasm and controls what goes in and out of the cell.
Human eggs (ova) are the largest cells in the body because they have a lot of…
Cytoplasm.
The part of a cell which controls the actions of the cell and contains the genes is called the…
Nucleus
The genes control the cell by making proteins.
Specialised cells join together in living things to form…
Tissues.
For example, muscle tissue is made from muscle cells.
