Bio Chemistry Interview Questions
Questions Answers Views Company eMail

What factors contribute to the enthalpy change when a denatured protein folds up?

1 1768

What role does proline play in tertiary structures?

1 2117

What types of changes can be used to effect fractional precipitation of proteins?

3 2747




What reaction is catalyzed by proteases? What steps are involved in determining the primary structure of a protein?

2 19185

What are the differences and respective advantages to electrophoresis, SDS PAGE, and isoelectric focusing?

6 18766

What features do the helix and the sheet have in common?

4 2706

What are the structures of ATP, ADP, PPi and Pi?

2 16593

Describe the classification of all amino acids .

4 5914




What reagents can be used to break disulfide bonds?

10 20960

What is the major advantage of Edman’s reagent?

4 11203

Where does ATP rank on a scale of phosphate transfer potential? What is the significance of this location?

3 4795

How do you measure the pollution in water

4 3735

How to measure average peptide chain length

2 16999

I have given the protocol for the cyclodextrin glygosyl transferase assay: One ml of appropriately diluted enzyme sample was incubated at 60 °C for 15 min with 5 ml of 1% (w/v) gelatinized soluble starch in 50 mM, 7.0-pH Tris–HCl buffer. Reaction was terminated by boiling the reaction mixture for 3 min and reaction volume was made to 10 ml with distilled water. Two ml of above reaction mixture was withdrawn and mixed with 3 ml of Tris–HCl buffer, 5 ml of 125 mM Na2CO3, and 0.5 ml of phenolphthalein (25 mg phenolphthalein/100 ml absolute alcohol). Absorbance was measured at 550 nm. The percent decrease of sample was calculated with respect to control containing 5 ml of buffer, 5 ml of sodium carbonate and 0.5 ml of phenolphthalein. where Acontrol = absorbance of control and Atest = absorbance of sample. The amount of β-cyclodextrin (β-CD) produced was estimated from the standard graph of 0–500 μg/ml β-CD concentration against % decrease in absorbance. One unit of CGTase was defined as the amount of enzyme required to produce 1 μm of β-CD/min. Please can you suggest me the formula for the defination given in the last line

867

bane the by products when crude oil is refined by distillation

917


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Un-Answered Questions { Bio Chemistry }

How does a random coil differ from an irregularly structured region?

925


What are hydrophobicity scales, and how are they used?

709


what are the steps involved in the calibration of HPLC

1384


What is the structural formula of molybdenum blue?

2168


bane the by products when crude oil is refined by distillation

917






what is QC and why is impotent in pathology lab

1461


Describe the structure of a peptide giving the sequence.

670


i have done M.SC. in biochemistry from india. as i have experience of pharmaceuticals in quality assurance department of 4 year.now i come to know that my degree is valid in uk.i got my comparision letter of degree from uknaric. but i m confuse that what is the next step to do for getiing job in lab? am i eligible to get directly job or as trainee than job ? or to register in ibms or what? pls tell me

2083


The elution volume of an enzyme on a gel filtration column can be predicted from a) its enzyme activity b) its protein absorbance at 280 nm c) subunit composition and monomer molecular mass(es) d) Choices a) and b) are both correct.

1861


How are free energy changes related to LeChatelier's Principle?

739


Which organ and subcellular site are most important for fatty acid biosynthesis?

949


What are the drawbacks of tissue slices technique?

976


How are coupled reactions used in biochemistry?

1072


what is your passion?

806


What is the difference between Phospholipids and phosphosphingosides?

1869