Dessication - Study guides, Class notes & Summaries

portion that anchors LPS molecule in lipid bilayer, can act as endotoxin when organism is killed & it is released into circulation (stimulate immune system to attack itself) - Lipid A Basic structure of peptidoglycan - Alternating NAG and NAM forming a glycan chain held together by terapeptide chain a thin layer of peptidoglycan surrounded by an outer membrane containing lipopolysaccharides - Gram-negative A type of dormant cell that is generally resistant to heat, dessication, UV light an...

What method is used to stabilize proteins making it resistant to further damage? CORRECT ANSWER-Fixation Name two methods of fixation? CORRECT ANSWER-Chemical reaction (formaldehyde) and physical (heat or dessication) What are two causes of Post mortem putrefaction if the tissue is not fixed? ***** CORRECT ANSWER-bacteria or mold What factor causes autolysis if tissue is not fixed? **** CORRECT ANSWER-enzyme attack What are four functions of fixatives? CORRECT ANSWER-1. kills tissue ...

Hershey and Chase performed an experiment in order to determine how bacteriophages infect bacteria. What did they find? The bacteriophage injects DNA into the host cell. This was found because, after centrifugation, the pellet was radioactive The largest difference between a Gram + and Gram - bacterial cell is: The gram + cell has a much thicker peptidoglycan layer Why does a Gram + cell stain blue/purple in a gram stain? The Gram + cell stains blue/purple because crystal violet rem...

What are the 2 fluid compartments of the body? What 2 sub-types of the second compartment is there? - ANSWER-1. intracellular fluids 2. extracellular fluids (interstitial fluid, blood plasma) Describe the composition of body fluid (3). (point 2 has 3 sub-points) - ANSWER-- water - large molecules -> carbohydrates: sugars -> proteins: enzymes -> fats: fatty acids - electrolytes: inorganic ions and salts What are the 3 types of regulation of blood plasma? - ANSWER-- osmotic re...

PCA Exam Defoliants Set Test Questions And Correct Answers Updated Defoliation - ANSWER : Leaf loss or leaf absicisson. In cotton production, it usually refers to leaf loss associated with application of a chemical that injures the leaf. Defoliation can also occur through natural leaf maturation and senessence, particularly with cooling weather after boll development Desiccation - ANSWER : acclereated drying of plant tissue Harvest Aid Chemical - ANSWER : chemicals with va...

Brucellosis def correct answers Brucellosis is a contagious, costly infectious disease of livestock animals caused by the bacteria of the genus Brucella. It is transmitted to humans from animals such as cattle, swine, and goats. It is characterized in humans by producing severe intermittent fever. Important cause of abortion in livestock. Produces necrotizing placentitis (inflammation and then no flow of nutrients from mother to fetus) Brucellosis: Etiology correct answers Genus: Brucella...

Virulence: mycolic acid in cell wall causes slow growth, protection from lysis once bacteria are phagocytized, capacity for intracellular growth, resistance to Gram-staining, detergents, many antimicrobial drugs, and dessication - Mycobacterium Tuberculosis Unique properties: grows very slowly, can live within macrophages, tuberculin skin test--positive when red swelling appears, BCG vaccine is used in countries w/ lots of TB cases, effective on 80% of children and 20-50% of adults, cord fact...

BRANCH 2 EXAM Questions With 100% Correct Answers 2024 Answer the following as true or false: Acute exposure is a one-time contact or over a very short time. - answerA. True B. False Answer the following as true or false: Both female and male mosquitoes bite. - answerA. True B. False botanical insecticides include which of the following? - answerA. Pyrethrum B. Permethrin C. Fipronil D. A & B E. All of the above In the documentation that must be left for the customer, which of the f...

Virology Lecture 12: Infection BasicsWest Nile Virus - correct answer Example that not all infections have consequences - by 2004 a million people infected with WNV -only 20% showed symptoms (febrile illness) -only 1% suffered neuroinvasive illness Viral Pathogenesis - correct answer Pathogenesis: the process of producing a disease Two components of viral disease - correct answer 1. effects of the viral replication on the host 2. effects of the host response on virus and host - many...

Histotechnology - Fixation Question and answers already passed 2023/2024 What are the steps tissue must go through before it is viewed under a microscope? - correct answers 1. Fixation 2. Processing 3. Embedding 4. Microtomy 5. Staining 6. Coverslipping Define fixation. - correct answers The preservation of cells and tissue in as life-like a way as possible by stabilizing the protein so that it is resistant to further changes. What are the functions of fixation? - correct answers 1. ...