Other
Bio 101 Theory Practice Questions
- Course
- BIO 101
- Institution
- Germanna Community College
Theory Practice Questions for Bio 101
[Show more]
Content preview
1. The chapter Evolution in Action box discusses how viruses infect specific organs.How do viruses use cellular membranes to attack specific organs?
Specific glycoprotein molecules exposed on the surface of the cell membranes of host
cells are exploited by many viruses to infect specific organs. For example, HIV is able to
penetrate the plasma membranes of specific kinds of white blood cells called T-helper
cells and monocytes, as well as some cells of the central nervous system.
2. What is meant by the terms “fluid mosaic” and “selective permeability” when
describing membranes?
Fluid Mosaic is the model used to describe the structure and function of a plasma
membrane and its. structure-diverse protein molecules. Selective permeability is the
property of biological membranes that allows them to regulate the passage of
substances across them.
3. Use the words diffusion and concentration gradient in a sentence.
A diffuser uses diffusion to spread molecules within the scents or oils into the air.The
concentration gradient guarantees that the cell is within equilibrium and evenly
distributes substances such as dye.
4. How does the structure of the membrane relate to its selective permeability? (Think
about the chemical properties of the inner core of the bi-layer.)
The membrane forms a barrier between the inside of the cell and the outside. The
structure only allows necessary molecules to enter and exit.
5. What kinds of molecules can freely cross through passive transport without transport
proteins? (Review and define the words polar and nonpolar if you need to!)
Non Polar
6. What kinds of molecules use facilitated diffusion (a kind of passive transport that
requires transporter proteins)?
Polar molecules and Ions are the molecules that facilitate diffusion.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anyiamgeorge19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now