Question

1. Using the letter “e” slide and the 4x (scanning) objective lens:

1. Using the circle on the right, draw the letter “e”
   exactly as it appears under the 4x objective lens.

Note that you can snap a photo with a smartphone
or take a screenshot of your computer screen of
the 4x image instead of drawing it here. Label the
photograph as “3a” and include it with your submitted
work if you choose to use this method.

2. What is the total magnification of the image?

3. How is the orientation of the letter “e” as seen through the microscope different from the way an “e” normally appears?

4. If the letter “e” is not lighted brightly enough or is too bright, what part of the microscope would it be best to adjust?

5. In what direction does the image appear to move when the stage is moved to your left?

6. In what direction does the image appear to move when the stage is moved away from you?

2. Using the letter “e” slide and the low power (10X) objective lens:

1. How has the image of the letter “e” changed when you switched from the 4X to the 10X objective lens? Could you still see the full letter “e”?

3. Using the letter “e” slide and the high power (40X) objective lens:

1. Could you see the entire letter “e” with the 40X objective lens in place?

2. Is your field of view on high power larger or smaller than the field of view on low power?

4. Using a cheek cell slide:

1. In the circle on the right, draw a picture of
   one cheek cell viewed under high power (40X) and
   label the nucleus, cell membrane, and cytoplasm.

Note that you can snap a photo with a smartphone or
take a screenshot of your computer screen of the 40x
image. Label the photograph as “7a” and include it
with your submitted work if you choose to use this method.

5. Using the onion root tip slide

1. In the circle on the right, draw the cells of
   the onion root tip as you see them under the
   microscope at 40x. Label all the organelles and
   cell structures you can identify.

Note that you can snap a photo with a smartphone
or take a screenshot of your computer screen of
the 40x image. Label the photograph as “7a” and
include this with your submitted work if you choose
to use this method.

6. Using the bacterial cell slide

1. In the circle on the right, draw the cells of
   the bacteria as you see them under the
   microscope at 100x. Label all the organelles and
   cell structures you can identify.

Note that you can snap a photo with a smartphone
or take a screenshot of your computer screen of
the 100x image. Label the photograph as “15a” and
include this with your submitted work if you choose
to use this method.

7. What do prokaryotic cells have instead of a nucleus?

8. Fill in the blanks with one (or more) of these choices: plant cell, animal cell, or bacterial cell. Questions may have more than one answer and answers can be used more than once.

1. You observed some cells through a microscope. You did not see any organelles in these cells.
   

These cells are ____________________________________

2. You saw a cell with a flagellum, but it wasn’t a sperm cell.

The cell observed is a _______________________________

3. You saw a cell with a cell wall. Which type(s) of cells would not be a correct identification?

The cell is not a(n) __________________________________

9. Fill in the blanks:

1. Three organelles and/or cell structures that are found in plant cells, but not in animal cells are: ___________________, __________________, and _____________________.

2. The structure where proteins are manufactured is a: ____________________.

3. An infertile man has a sperm sample tested and discovered the sperm have low motility (don’t swim normally). The malfunctioning cell structure in these sperm is a: ______________________________.

4. Two structures that a material would have to cross to enter the cytoplasm of a plant cell are the ___________________ and the ________________________.

5. ______________________ would be more numerous in muscle cells than skin cells, due to the higher energy needs muscle cells have.

6. The ___________________________ is responsible for manufacturing fats (lipids) for use and storage in a cell.

7. The location where genetic information is stored is the: ___________________.

8. The location in the cell where most organelles can be found is the: ________________________________.

1. The ____________________________________ allows some materials to enter the cell, but not others.

Answer 1

Prokaryotic cells have their genetic material dispersed in their cytoplasm as they lack membrane bound organelles like a nucleus. They might sometimes also contain plasmids.

fill in the blanks-

1. no organelles in cells- bacterial cells

2. cell with flagellum- bacterial cells

3. animal cells lack a cell wall.

4. three organelles found in plant but not animal cells- chloroplast, cell wall and vacuole.

5. ribosomes are the site of protein synthesis in a cell.

6. the malfunctioning organelle is the flagella which helps sperms to swim.

7. Two structures that a material would have to cross to enter the cytoplasm of a plant cell are the cell membrane and cell wall of the plant cell.

8. Mitochondria ould be more in muscle cells as they require more energy as compared to skin cells. energy is compensated in the form of ATP, which is the currency of the cell and is made at the end of glucose metabolism in the mitochondria (powerhouse of the cell).

9. the endoplasmic reticulum synthesises lipids as well as serves as a site of storage in conjunction with protein bodies.

10. genetic information is stored in the nucleus.

11. Cytoplasm is the location where most organelles are found.

12. the plasma membrane allows some materials to cross and some not. it is selectively permeable.