Question

1. all the internal structures are suspended (floating) in what substance?
2. one of the bacteria in model 1 has a tail - like structure.

a. what is this structure called?
b. what might be the purpose of this structure?
c. based on your answer to the previous question, what might you infer about the absence of this structure in the other two bacteria cells?
model 2 - animal and plant cells
animal cell
plant cell
cell membrane
temporary vacuole
nuclear membrane
dna
nucleolus
nucleus
chloroplast
cytoplasm
endoplasmic reticulum
ribosomes (free or attached)
lysosome
mitochondria
vesicle
golgi apparatus
large permanent vacuole
cell wall

1. looking at model 2, list at least three structural differences (other than shape) between an animal and a plant cell.
2. where do you find the dna in each cell in model 2?
3. do both cells in model 2 have a nucleus?

Explanation:

Step1: Answer question 5

All internal structures of a cell are suspended in cytoplasm.

Step2: Answer question 6a

The tail - like structure in bacteria is called a flagellum.

Step3: Answer question 6b

The purpose of the flagellum is for locomotion, allowing the bacterium to move towards or away from certain stimuli.

Step4: Answer question 6c

The absence of the flagellum in the other two bacteria cells might infer that these bacteria do not need to move actively, or they have other means of movement or are sessile.

Step5: Answer question 7

1. Plant cells have a cell wall, animal cells do not.
2. Plant cells have chloroplasts, animal cells do not.
3. Plant cells have a large permanent vacuole, animal cells have temporary vacuoles.

Step6: Answer question 8

In both the animal and plant cells in Model 2, the DNA is found in the nucleus.

Step7: Answer question 9

Yes, both the animal and plant cells in Model 2 have a nucleus.

Answer:

1. Cytoplasm

6a. Flagellum
6b. For locomotion
6c. They may not need to move actively or have other movement means or are sessile

1. Plant cells have a cell wall, animal cells do not; Plant cells have chloroplasts, animal cells do not; Plant cells have a large permanent vacuole, animal cells have temporary vacuoles
2. In the nucleus
3. Yes