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University of Texas, San Antonio BIOLOGY 1404 Lab 2 - Cell Strcuture Post-Lab Assignment
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University of Texas, San Antonio BIOLOGY 1404 Lab 2 - Cell Strcuture Post-Lab Assignment
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Fill in the sizes that you measured and answer the following 17 questions relSize Comparison
Size
Human cheek cell 70u
Human cheek nucleus 10u
Lactobacillus 1u
Elodea cell 100u
Amyloplast none
Onion cell 60u
Penicillium conidia none
What structures are visible in the stained preparation of cheek cells that were invisible in the
Question 1 unstained preparation?
The structures that were visible in the stained preparation of cheek that were not invisible
in the unstained preparation nucleus.
Question 2 What else do you see on this slide preparation other than cheek cells?
My group observed within the cheek cell circular linings and small dots spreaded
throughout.
Question 3 What is the three dimensional shape of Lactobacillus?
The three dimensional shape of Lactobacillus appeared to be sphere-like or circle-like.
, Question 4 How did methylene blue help improve your visualization of Lactobacillus?
The methylene blue helped improve your visualization of Lactobabacillus by providing a
darker contrast of colored to the bacteria, exposing them.
Question 5 What is the three dimensional shape of Elodea?
The three dimensional shape of Elodea appeared to be rectangular prism in nature.
Question 6 Where are the chloroplasts located in the Elodea cell? Why?
The chloroplasts in the Eldoea cell is located in the cytoplasm on the outer layer of the cell
wall, providing support and protection to the organelles.
What is the approximate number of chloroplasts per cell? Remember the microscope shows a
two dimensional view. However the cells are 3 dimensional, so you will need to focus up and
Question 7 down to count the chloroplasts accurately.
The approximated number of chloroplasts per cell was 70.
Question 8 Is cytoplasmic streaming in all of the cells in the same direction?
Yes, the cytoplasmic streaming in all of the cells moved in the same direction.
Question 9 How do the size of a human epithelial cell compare to the bacteria and elodea cells?
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