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Cell Structure

Cell theory and the Microscope

Choose one theory-spontaneous generation theory or cell theory-and select one statement that corresponds to the theory you want to refute or support: Spontaneous generation theory 1. Frogs come from muddy soil because they always appear in that environment. 2. Flies come from rotten meat because they always appear where

Plant Cells vs Animal Cells: Differences and Similarities

Plant Cells vs Animal Cells Provide a list describing at least five similarities and three differences between plant and animal cells. In addition, choose five internal structures of plant or animal cells (organelles) and describe their functions in your own words.

DNA Ribosomes in Cells

If you wanted to get DNA from a cell, which one of the following structures would provide the largest concentration? a ribosome b nucleus c mitochondria d lyosome

Examination and processing of the crime scene

I need help getting started. Any help will be appreciated. Thank you. SCENE Joe stopped for a beer at the Turn-a-Round Lounge in Smalltown on his way home from work. He ran into his ex-girlfriend, Michelle, and her new boyfriend, Sam. Joe and Sam got involved in a heated confrontation, and bottles and fists started to fly

Cell Adhesion and Cadherins

How do cadherins plays an important role in cell to cell junctions? How do experimental techniques prove it, and what they conclude?

Literature Review: Cadherin-Mediated Cell-Cell Adhesion

See the attached file. Review of the article titled "Transmembrane control of cadherin-mediated cell adhesion: a 94 kDa protein functionally associated with a specific region of the cytoplasmic domain of E-cadherin." The review includes a short description of what cadherins are, what they do, and how they function with the acti

Cells and their Components ~ Essay Help

I need help with getting started with my essay, titled "Why We study the Cell and Its Components." It has to have correct grammar, etc. and it has to utilize vocabulary from the chapter, and demonstrate understanding of key concepts.

There are two main types of cells: prokaryotic and eukaryotic

There are two main types of cells: prokaryotic and eukaryotic. 1. Bacterial cells are prokaryotic. Choose two structures of bacterial cells and explain how these structures allow bacteria to function as unicellular organisms. 2. There are many examples of eurkaryotic cells. Algae, Fungi, Plants, and Animals are a

Protein translation and the ER

1. Describe what type of ER targeting signal sequences each of the following proteins would need for proper translation and localization: A) A protein that functions in the lumen of the ER B) An integral membrane protein with 3 membrane spanning domains with SS at its N terminus C) An integral membrane protein where the fir

Membrane Fluidity

I need help this this problem. Please explain what happen in each case. 9) A bacterium is suddenly expelled from a warm human intestine into the cold world outside. Predict what kind of adjustments the bacterium might make to maintain the same level of membrane fluidity? A. decrease the amount of glycolipids in the membrane

Artificial Cell

Society influences the work that scientists do and society is does not permit stem cell. If you are a scientist how could you build an artificial cell that can take the place of living stem cells. This cell needs the structures and the functions of a typical cell (reproduce, metabolize, etc.), and it should include all seven cha

Plasmid mapping: Example problem

A plasmid digest with BamHI produced 2 kb and 4 kb fragments. Digest of a plasmid with HindIII produced 6 kb fragment. Double digest with both enzymes produced 1 kb, 2 kb and 3 kb fragments. Draw a plasmid map.

Loss of Mitochondria by a Cell

In Madeleine L'Engle's children's novel A Wrinkle in Time, the mitochondria in one of the characters starts to die. Describe what would happen to people who lost their mitochondria, and explain why it would happen.

DNP & Photosynthesis in plants

Please help with the following problem. Dinitrophenol (DNP) is an "uncoupler" that causes membranes to become permeable to H+. Explain what would happen if DNP was added to plants that were carrying out photosynthesis. Would the light and dark reactions still proceed? Include in your answer whether or not O2, glucose, ATP,

What is endosymbiosis?

Explain the relationship between ancient bacteria and cyanobacteria which lead to the formation of chloroplasts and mitochondria.

Cell Biology Multiple Choice questions

1. Protein insertion into the mammalian ER membrane is typically a. cotranslational c. pretranslational b. post-translational d. quasitranslational 2. In N-glycosylation of proteins in the ER lumen, sugar(s) are added to the nascent chain at

Cell membrane structure and function

1. The structure of the plasma membrane is best described as a. a single layer of phospholipids, in which the phosphate groups face the interior of the cell b. a single layer of phospholipids, in which the phosphate groups face the extracellular space c. lipid bilayer, in which the phosphate groups on the phos

differences between the patient's and control mitochondria

A 26 years old patient initially presented with a history of fatigability dating back to early childhood. Even very mild exercise resulted in a rapid exhaustion. After 4 minutes on a bicycle ergometer, the patient's blood lactate concentration rose from 0.8mM to 10mM;it dropped slowly after the end of the exercise but was still

Isolating Con A receptor

Most membrane proteins including the Con-A receptor can be solubilized by treating cell membranes with a non-ionic detergent such as Triton X 100. You are given such a soluble preparation of erythrocyte proteins. Describe a single procedure that could be used to isolate the Con A Receptor from this preparation? Please explain.

Analysis of a Cell-Surface Receptor

Questions: 1. For Part A, please explain in detail the results in Data Analysis and why they turned out as they did? 2. For Part B, please explain in detail the results in Data Analysis and why they turned out as they did? 3. One of the simple sugars (galactose or mannose) used in this exercise should have inhibited Con

Cells, cell biology & microscopes

1. In an inherited condition called glycogen cardiomyopthy teenagers develop muscle weakness which affects heart as well as other muscles. Samples of the affected muscle cells contain huge lysosomes, swollen with the carbohydrate glycogen. How might this condition arise? 2. Why does a muscle cell conatin many mitochondrion

Draw and label an in vitro cellular aging curve-Phase

G. Draw and label an in vitro cellular aging curve-Phase I, II, and III. H. What are the typical conditions for growing human cells outside the body? Compare use of serum vs. defined medium. I. Define a population doubling-in vitro. How many can you expect from a human, chicken, and mouse? J. Explain pulse-labeled

Photosynthesis and Cellular Respiration

1. Create a table comparing anc contrasting the two processes. Include in your comparison variables such as organism type, energy source, cellular location, substrates/reactants/products, full and balanced chemical reation, carrier molecules, and any other parameter you find relevant. 2. The mitochondrion contains its own

Nuclear Transplantation Techniques

Several species of mammals have been cloned by nuclear transplantation using an adult cell as the source of the nucleus. Is there any contribution to the genotype of the cloned offspring from the oocyte into which the nucleus is tranplanted? Briefly explain. Name a technique that can be used to simulataneously detect the tran