Why did the gelatin tubes have to be moved to 4Cbefore analysis?O a. If gelatinase was produced the gelatinmedium will remain as a liquid when chilledto 4C.b. If gelatinase was produced the gelatinmedium will return to a solid phase whenchilled to 4C.O c. If the gelatin was hydrolyzed to itsconstituent amino acids the medium willturn red at 4C.d. If the gelatin was not hydrolyzed themedium will remain as a liquid when chilledto 4C.

Gelatin is a protein derivative obtained from animal collagen. A gelatin test is performed in…

Answered: Why did the gelatin tubes have to be…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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GELATIN b.how will you inoculate? c.How will you incubate? d. what are Post- Incubation procedures? e. How will you read the positive and negative results?
Use the following diagram to answers the questions. A. Is this cell Gram + or Gram -? Provide 2 pieces of evidence to support your choice. B. If you are infected by this bacterium can the antibiotic be effective in killing it. Explain. C. NAME and label the structures in the diagram that could be involved in conjugation? Why conjugation is an important process for the bacteria
How do we ensure that gel electrophoresis is functional? a Running buffer, containing electrolytes, allows for electrical current. b The apparatus must be either vertical or upright. c The matrix of the gel must be set to the appropriate percentage. d All proteins need to be denatured and given a unique charge.
After trypsinization of cells in the flask and cell counting, you determined a concentration of 10 million cells/mL. What volume of this cell suspension will you use to prepare a 20 mL cell suspension (200,000 cells/mL) for a 24-well plate? O a. 0.4 ul b.0.4 mL Oc. 40 mL O d.40 µL e. none of the above
Is organism 1 a plant animal or neither explain what procedure would you used to perform test A then explain how the results of test A allow you to determine wether the test was positive or negative for organism 1?
Coloured and white beads were carefully selected for equality of size and shape. Equal quantities of each colour were then placed in a container. Randomly select enough beads to fill the cover of a petri dish. Count the number of beads of each colour and record your data in table 1.6. Then calculate the expected numbers based on the sample size and the known ratio of white to coloured beads. Complete the table and calculate 32. Table 1.6 Chi-Square Calculations for Colored And White Beads Phenotype O E (O-E) (O-E)2 (O-E)2/E Colored White Totals How many degrees of freedom are there? Using table 1.5, what 32 values lie on either side of your calculated 32 value? What are the probability values associated with the 32 values? Briefly interpret the 32 value you have just calculated.

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