B1 Microscopes and cells Flashcards
The maximum magnification you can get with standard student microscope is…
X 400
If the eyepiece of a microscope has a magnification of X 10 and the objective lens has a magnification of X 20, the total magnification is…
X 200
because you multiply the two magnifications to get the total
To make the specimen (the thing you are viewing) easy to see, you should…
Make sure it is thin
Place it on a glass slide
Use a stain
Flatten it with a coverslip
Use plenty of light
Adjust the focus
To stain the starch inside a cell, use…
Iodine Solution, which turns from yellow to…
black
To stain the nucleus of a cell, use…
Methylene Blue
If a waterflea measuring 4 mm was drawn to fill an A4 sized page, is the scale X 70 or X 0.07?
X 70
because it has been drawn 70 times bigger than normal
If a giraffe measuring 6 m was drawn to fill an A4 sized page, is the scale X 50 or X 0.05?
X 0.05
because it has been drawn much smaller than normal
Name part 1 of this animal cell
Cell surface membrane
Name part 1 of this plant cell
Cell wall
What four cell parts would you find in both plant and animal cells?
Cell surface membrane
Nucleus
Mitochondria
Cytoplasm
What three cell parts are only found in plant cells?
Cell wall
Vacuole
Chloroplasts
What is the function of the nucleus? (labelled 4 in this diagram)
stores the genes which control the production of protein
What is the function of the cytoplasm? (labelled 4 in this diagram)
watery contents of the cell where life processes take place
List these in order of size starting with the smallest: tissue, cell, organ, nucleus
Nucleus Cell Tissue (cells joined together) Organ (tissues joined together)
What is the function of the cell surface membrane? (labelled 1 in this diagram)
surrounds the cytoplasm and controls what goes in and out of the cell
What is the function of the mitochondria? (labelled 5 in this diagram)
release energy from food for the cell
What is the function of the cell wall? (labelled 1 in this diagram)
provides strength and structure for a plant cell
What is the function of the chloroplasts? (labelled 7 in this diagram)
absorb light to make food in plant cells, containing a green pigment called chlorophyll which helps a process called photosynthesis take place
What is the function of the vacuole? (labelled 6 in this diagram)
permanent liquid-filled section of plant cells
List these in order of size starting with the smallest: heart, mitochondria, muscle tissue, muscle cell
Mitochondria
Muscle cell
Muscle tissue (made of many muscle cells)
Heart (an organ made of several types of tissue)
Genes are made of…
DNA
We inherit characteristics from our parents because they pass on their…
genes
Name part 1 of this typical microscope
eye-piece lens
Name part 2 of this typical microscope
focus knob
Name part 3 of this typical microscope
objective lens
Name part 4 of this typical microscope
stage
Name part 5 of this typical microscope
mirror
Name part 2 of this animal cell
Nucleus
Name part 3 of this animal cell
Mitochondria
Name part 4 of this animal cell
Cytoplasm
Name part 2 of this plant cell
Cell surface membrane
Name part 3 of this plant cell
Cytoplasm
Name part 4 of this plant cell
Nucleus
Name part 5 of this plant cell
Mitochondria
Name part 6 of this plant cell
Vacuole
Name part 7 of this plant cell
Chloroplasts
