After centrifugation - Study guides, Class notes & Summaries

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...

describe the duplex of an E. coli duplex? circular + molecules of about 4636kb describe DNA within an E. coli? compact describe the 2 ways DNA is compacted? looping loops are attached a the base in an unknown way. Supercoiling how large is our haploid genome? 3.2 Gap what is the spacing between base pairs? 0.34 nm thus what is the total length of of DNA in all somatic cells? 2.2m what is the diameter of our nucleus? 6 um how long is...

BIO110 PRACTICE EXAM 4|165 Questions with Verified Answers TRNA has a few loops in its structure, what loops connects to the mRNA codon? a. codon domain b. anticodon c. acodon d. amino acid - CORRECT ANSWER b. anticodon Catabolite activator protein: a. increases the affinity of the promoter region for RNA polymerase b. decreases RNA polymerase activity c. becomes nonfunctional when it binds to AMP d. binds and activates RNA polymerase e. blocks RNA polymerase access to the DNA tem...

Complete BOC: ASCP Prep 1) Following overnight fasting, hypoglycemia in adults is defined as a glucose of: a. <70 mg/dL (<3.9 mmol/L) b. <60 mg/dL (<3.3mmol/L) c. <55 mg/dL (<3.0mmol/L) d. <45mg/dL (<2.5mmol/L) - d (Diagnosis of hypoglycemia in adults.) 3) The preparation of a patient for standard glucose tolerance testing should include: a. a high carbohydrate diet for 3 days b. a low carbohydrate diet for 3 days c. fasting for 48 hrs. prior to testing d. b...

Molecular Cell Biology Final EXAM QUESTIONS AND CORRECT ANSWERS(VERIFIED ANSWERS)|AGRADE Separation of most blood cells is difficult, if not impossible, to achieve because they have similar properties and/or densities. What procedure is used to separate T-cells of the immune system from the many other different types of white blood cells or spleen cells? What feature of the T-cell facilitates the isolation protocol? Describe how this procedure is performed. - ANSWER- Flow cytometr...

Which one of the following statements about acetaminophen metabolism is false? Choose the single best answer A. It is metabolized in the kidney B. It is largely metabolized in the liver to glucuronide and sulfonate conjugates C. A small amount is metabolized via cytochrome oxidase to a reactive benzoquinoneimine intermediate D. This intermediate becomes toxic to the liver once tissue glutathione becomes depleted - ANSWER-A; The benzoquinoneimine intermediate produced in the liver as a...

When using an electronic cell counter, which of the following results can occur in the presence of a cold agglutination? a) increased MCV and decreased RBC b) increased MCV and normal RBC c) decreased MCV and increased MCHC d) decreased MCV and RBC - a) increased MCV and decreased RBC Cerebrospinal fluid for glucose assay should be: a) refrigerated b) analyzed immediately c) heated to 56 degree C d) stored at room temp after centrifugation - b) analyzed immediately The major crossmatch will...

Artery - ANSWER-Blood vessels that carry blood away from the heart Arterioles - ANSWER-Smallest branches of arteries Atria - ANSWER-Upper chambers of the heart Bacteremia - ANSWER-Presence of bacteria in blood Basilic Vein - ANSWER-Vein on the inner side of the antecubital area - this is the last choice Bleeding time - ANSWER-Test done to asses platelet plug formation in the capillaries - pre-surgical Buffy coat - ANSWER-After centrifugation, the layer that is formed in a speci...

BOC Clinical Chemistry Questions and Answers Already Passed d (Diagnosis of hypoglycemia in adults.) 1) Following overnight fasting, hypoglycemia in adults is defined as a glucose of: a. <70 mg/dL (<3.9 mmol/L) b. <60 mg/dL (<3.3mmol/L) c. <55 mg/dL (<3.0mmol/L) d. <45mg/dL (<2.5mmol/L) a (GTT diet preparation.) 3) The preparation of a patient for standard glucose tolerance testing should include: a. a high carbohydrate diet for 3 days b. a low carbohydrate diet for...

Molecular Cell Biology Final EXAM QUESTIONS AND CORRECT ANSWERS(VERIFIED ANSWERS)|AGRADE Separation of most blood cells is difficult, if not impossible, to achieve because they have similar properties and/or densities. What procedure is used to separate T-cells of the immune system from the many other different types of white blood cells or spleen cells? What feature of the T-cell facilitates the isolation protocol? Describe how this procedure is performed. - ANSWER- Flow cytometr...