Compounds I, II, and III are in the following biochemical pathway: precursor compound I enzyme A enzyme B compound II ► compound III enzyme Mutation a inactivates enzyme A, mutation b inactivates enzyme B, and mutation c inactivates enzyme C. Mutants, each having one of these defects, were tested on minimal medium to which compound I, II, or III was added. Fill in the results expected of these tests by placing a plus sign (+) for growth or a minus sign (-) for no growth in the table below. Minimal medium to which is added Strain with mutation Compound I Compound II Compound III

Compounds I, II, and III are in the following biochemical pathway: precursor compound I enzyme A enzyme B compound II ► compound III enzyme Mutation a inactivates enzyme A, mutation b inactivates enzyme B, and mutation c inactivates enzyme C. Mutants, each having one of these defects, were tested on minimal medium to which compound I, II, or III was added. Fill in the results expected of these tests by placing a plus sign (+) for growth or a minus sign (-) for no growth in the table below. Minimal medium to which is added Strain with mutation Compound I Compound II Compound III

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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The vaccine for Haemophilus influenzae type b is called a conjugate vaccine. It is composed of the tetanus toxoid protein conjugated to the capsular polysaccharide of the H. influenzae type b bacteria. When used to vaccinate infants, the antibody response generated by this vaccine would include 0 0 0 0 antibodies that bind only to the protein-polysaccharide conjugate in the vaccine. antibodies to the tetanus toxoid only. antibodies to the bacterial polysaccharide and the tetanus toxoid. antibodies to the bacterial polysaccharide only.
If a sample is composed of a mixture of maltose, maltodextrin, and glucose, which of the following is expected? Adding alkaline CuSO4 to the solution will turn the solution into orange with some dark red precipitate. Performing Molisch Test on the sample will give a negative result. Reaction of the sample with phenylhydrazine will give a solution with yellow precipitate. Furthermore, inspection of the precipitate under the microscope will show cotton ball shaped crystals. . The Osazone Test on the sample will give a yellow solution with no visible precipitate.
There are several applications of microorganisms in industries. One of them is in medical and pharmaceuticals. Name a suitable microorganism and demonstrate its application in producing synthetic human insulin.
Nanoparticles were added in a liquid to prompt the medication release, and it was observed that 5 mg of the medication was released in 1 liter of PBS, which accounted for 60% of the total amount of the drug. While producing an equivalent number of nanoparticles, 5 ml of 10 mg ml−1 of the drug was added. What is the efficiency of encapsulation?
Azathioprine is an immunosuppressant drug used in kidney transplants. In vivo, azathioprine is metabolized to the hypoxanthine analog 6- mercaptopurine, which is then converted into 6-mercaptopurine ribose monophosphate, the active form of the drug. 6- Mercaptopurine ribose monophosphate also inhibits de novo purine synthesis, reducing uric acid levels in the blood and urine. However, when administered to Lesch – Nyhan patients, there was no effect on uric acid levels. Explain why this is the case.
Please determine the template sequence used in a pyrosequencing reaction in the following graph. A 4G T 2G C 3T 4G 2T G CA G 2T G 3 2 min AGT CA G T C A G T C A G T C A GT C AG T c A G 0.5 pmol
Table 1. Kinetic parameters of a chosen model wild-type (WT) enzyme and three catalytically-improved mutants (M1 to M3). Enzyme variants k (8¹) WT MI M2 M3 50 500 1000 50 K₁, (μM) 10 100 100 1 k/K (HM¹¹ s¹) 5 The study above was done on a wildtype enzyme and three genetically-engineered mutants. The purpose was to find a mutation to improve the catalytic efficiency of the enzyme for industrial use. Which is the most accurate statement concerning the data? M2 is the optimal choice when substrate concentrations are saturating. The wildtype enzyme is still preferable to M3 when S<
Why do we use standard solutions in protein assays? Explain briefly.
A biotechnology company discovers a bacterium isolated from waste industry that produces protease that can operate at high pH. Such protease is useful in making heavy duty detergent that has high pH catalytic condition. Thus, the company decided to produce the protease at large scale using bioreactors. a) Discuss how this is possible when the bacterium is difficult to grow and produce the protease at low level. Suggest any means to overcome these difficulties. b) Suggest what type of bioreactor and mode of culture that is suitable for the production of protease at large scale. Justify your answer.
The purified OXA-M290 enzyme can now be tested to determine which β-lactamase inhibitor is most effective. This inhibitor could be prescribed in combination with a β-lactam antibiotic to treat the infection caused by the E. coli KGH1 strain. Before testing inhibitors against OXA-M290, the kinetic activity of this enzyme must first be measured. The activity of OXA-M290 is measured using nitrocefin, a chromogenic β-lactam antibiotic. When nitrocefin is hydrolyzed by a β-lactamase, it changes from yellow to red in colour. The nitrocefin hydrolysis product has an extinction coefficient of 20,500 M-1 cm-1 at 486 nm. The hydrolysis of 60 μM nitrocefin by 1 nM OXA-M290 is monitored using a microplate reader. The absorbance of the wells in the plate is measured at 486 nm every 30 seconds. This experiment is carried out with three replicates, generating the following data: Time (min) Absorbance of Replicate 1 Absorbance of Replicate 2 Absorbance of Replicate 3 0.5 0.0984…
List the types of metal that are components of thephotosynthesis mechanism. What functions do theyserve?