New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

Biology Lecture 11 A - Exam 3

by: Devin Mart

Biology Lecture 11 A - Exam 3 BIO 121 A

Marketplace > Missouri State University > Biology > BIO 121 A > Biology Lecture 11 A Exam 3
Devin Mart
GPA 3.82

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Tour of the Cell
General Biology
Dr. Durham
Class Notes
BIOLOGY 120, general biology
25 ?




Popular in General Biology

Popular in Biology

This 2 page Class Notes was uploaded by Devin Mart on Friday March 25, 2016. The Class Notes belongs to BIO 121 A at Missouri State University taught by Dr. Durham in Spring 2016. Since its upload, it has received 9 views. For similar materials see General Biology in Biology at Missouri State University.


Reviews for Biology Lecture 11 A - Exam 3


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 03/25/16
  Mart 1  Lecture 11A: Tour of the Cell    ● Microscopes lead to the discovery and early study of cells ­ 17th century.  ○ The ​ light microscope allows visible light to pass through the specimen and then  through glass lenses, the lenses refract light making the image magnified.  ○ Magnification ​ is the ratio of an object’s image to its real size.  ○ Resolving power ​ is the ability of an electronic device to produce images that can  be distinguished, the measure of image clarity.  ■ The minimum distance two points can be separated and still viewed as two  separate points.  ■ Light microscopes can resolve individual cells, but not organelles.  ○ The​  electron microscope allows a beam of electrons focused through specimen or  onto the surface.  ○ The ​ transmission electron microscopes ​are used to study the ultrastructure of  cells.  ■ Images are focused and magnified by electromagnets.  ○ The ​ scanning electron microscopes ​are used to study the surface of structures.  ■ A beam excites electrons found on the surface of a substance providing a  great depth of field, 3­D images.  ■ Limitations: the study of dead cells and processing may introduce  artifacts.  ■ Cytology ​ is the branch of biology concerned with the structure and  function of plant and animal cells.  ● Cell fractionation ​is the process of separating major organelles of the cells.  ● General features of prokaryotic and eukaryotic cells include:  ○ Surrounded by a plasma membrane.  ○ Substance within a membrane ­ ​ cytosol, the aqueous component of the cytoplasm  of a cell, within which various organelles and particles are suspended, and  contains organelles.  ○ Contains chromosomes, genes in the form of DNA.  ○ Ribosomes​ , organelles that code for the production of protein.  ● The major difference:  ○ Eukaryotic cell ­ chromosomes in the membrane bound nucleus.  ■ Cytoplasm ​ is what fills the region between nucleus and the plasma  membrane, this contains membrane­bounded organelles.  ■ Eukaryotic cells are bigger than prokaryotic cells.  ○ Prokaryotic cell ­ DNA is in nucleotides and not membranes.  ● The ​ plasma membrane ​ is a selective barrier that allows the passage o, nutrients, and  waste.    Mart 2  ○ Internal membranes can be found in eukaryotic cells.  ○ This participates in metabolism and facilitates specific metabolic functions.  ○ The general structure of biological membranes includes:  ■ A double layer of phospholipids, lipids, and proteins.  ■ A unique combination of lipids and proteins for its specific functions (i.e.  mitochondria).  ● The nucleus contains a eukaryotic cell’s genetic library.  ○ Some genes can even be found in the mitochondria and the chloroplasts.  ○ Nuclear pores ​ are large proteins that process the diffusion of small molecules.  ○ Chromatin ​ is the material of which the chromosomes of organisms other than  bacteria are composed, consists of protein, RNA, and DNA.  ○ Chromosomes ​ are a threadlike structure of nucleic acids and protein found in the  nucleus of most living cells, carrying genetic information in the form of genes.  ■ Humans contain a total of 46 chromosomes, 23 from each spouse.  ○ The ​ nucleolus ​is a small dense spherical structure in the nucleus of a cell during  interphase.  ■ Ribosomal RNA (rRNA) is synthesized and assembled with proteins to  form ribosomal subunits.  ○ The nucleus directs protein synthesis by synthesizing messenger RNA (mRNA).  ■ mRNA travels to cytoplasm and combines with ribosomes to translate  genetic message into proteins.  ● Ribosomes contain a strand of rRNA and protein.  ○ Free ribosomes ​ make proteins function in cytosol.  ○ Bound ribosomes ​ are attached to the endoplasmic reticulum and synthesize  proteins, membranes or exported from the cell.            


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Amaris Trozzo George Washington University

"I made $350 in just two days after posting my first study guide."

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.