Umuc biology 102 / 103 lab 3: cell structure and function answer key

This contains 100% correct material for UMUC Biology 103 LAB03. However, this is an Answer Key, which means, you should put it in your own words. Here is a sample for the Pre lab questions answered:

Don't use plagiarized sources. Get Your Custom Essay on
Umuc biology 102 / 103 lab 3: cell structure and function answer key
Just from $5/Page
Order Essay

Pre-Lab Questions

1. Identify the major similarities and differences between prokaryotic and eukaryotic cells. (2 pts)

Prokaryotes tend to be less complex than eukaryotic cells, with fewer organelles and (generally) fewer requirements for survival. Eukaryotes have a nucleus, while prokaryotes do not. Both eukaryotes and prokaryotes have DNA, a cell membrane, and cytoplasm.

 

2. Where is the DNA housed in a prokaryotic cell? Where is it housed in a eukaryotic cell? (2 pts)

DNA is housed in the nucleus in eukaryotic cells. Prokaryotic cells do not have a nucleus, and thus DNA exists freely in the cytoplasm.

 

3. Identify three structures which provide support and protection in a eukaryotic cell. (2 pts)

The cell membrane, the cytoplasm, and the cytoskeleton (microtubules, microfilaments, etc.).

 

The rest of the questions are answered as well:

 

 
  Onion Root Tip 100X g (Small)

Experiment 1: Cell Structure and Function

Post-Lab Questions

1.    Label each of the arrows in the following slide image:

 

 

2.    What is the difference between the rough and smooth endoplasmic reticulum?

 

 

 

3.    Would an animal cell be able to survive without a mitochondria? Why or why not?

 

 

 

4.    What could you determine about a specimen if you observed a slide image showing the specimen with a cell wall, but no nucleus or mitochondria?

 

 

 

5.    Hypothesize why parts of a plant, such as the leaves, are green, but other parts, such as the roots, are not. Use scientific reasoning to support your hypothesis.

 

 

 

 

 

Experiment 2: Osmosis – Direction and Concentration Gradients

Data Tables and Post-Lab Assessment

Table 3: Sucrose Concentration vs. Tubing Permeability

Band Color

Sucrose %

Initial Volume (mL)

Final Volume (mL)

Net Displacement (mL)

Yellow

 

 

 

 

Red

 

 

 

 

Blue

 

 

 

 

Green

 

 

 

 

 

Hypothesis:

 

 

 

 

Post-Lab Questions

1.    For each of the tubing pieces, identify whether the solution inside was hypotonic, hypertonic, or isotonic in comparison to the beaker solution in which it was placed.

 

2.    Which tubing increased the most in volume? Explain why this happened.

 

 

 

 

3.    What do the results of this experiment this tell you about the relative tonicity between the contents of the tubing and the solution in the beaker?

 

 

 

4.    What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

 

 

 

5.    How are excess salts that accumulate in cells transferred to the blood stream so they can be removed from the body? Be sure to explain how this process works in terms of tonicity.

 

 

 

6.    If you wanted water to flow out of a tubing piece filled with a 50% solution, what would the minimum concentration of the beaker solution need to be? Explain your answer using scientific evidence.

 

 

 

7.    How is this experiment similar to the way a cell membrane works in the body? How is it different? Be specific with your response.

 

Order a unique copy of this paper
(550 words)

Approximate price: $22

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

We are committed to making our customer experience enjoyable and that we are keen on creating conditions where our customers feel secured and respected in their interactions with us.
With our qualified expert team who are available 24/7, we ensure that all our customer needs and concerns are met..

Money Payback-back guarantee

Our refund policy allows you to get your money back when you are eligible for a refund. In such a case, we guarantee that you will be paid back to your credit card. Another alternative we offer you is saving this money with us as a credit. Instead of processing the money back, keeping it with us would be an easier way to pay for next the orders you place

Read more

Zero-plagiarism guarantee

All orders you place on our website are written from scratch. Our expert team ensures that they exercise professionalism, the laid down guidelines and ethical considerations which only allows crediting or acknowledging any information borrowed from scholarly sources by citing. In cases where plagiarism is confirmed, then the costumier to a full refund or a free paper revision depending on the customer’s request..

Read more

Free-revision policy

Quality is all our company is about and we make sure we hire the most qualified writers with outstanding academic qualifications in every field. To receive free revision the Company requires that the Customer provide the request within fourteen (14) days from the first completion date and within a period of thirty (30) days for dissertations.

Read more

Privacy policy

We understand that students are not allowed to seek help on their projects, papers and assignments from online writing services. We therefore strive to uphold the confidentiality that every student is entitled to. We will not share your personal information elsewhere. You are further guaranteed the full rights of originality and ownership for your paper once its finished.

Read more

Fair-cooperation guarantee

By placing an order with us, you agree to the service we provide. We will endear to do all that it takes to deliver a comprehensive paper as per your requirements. We also count on your cooperation to ensure that we deliver on this mandate.

Read more

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency