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Proteins and amino acids



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Q1. How is the secondary structure of a protein stabilized?

(a) Van der wall forces
(b) Hydrogen bonding
(c) Covalent bond
(d) Hydrophobic bond

Q2. What is the maximum wavelength that Tryptophan and tyrosine absorb?

(a) 280nm
(b) 260nm
(c) 257nm
(d) 230nm

Q3. In which amino acid Imidazole group, an aromatic ring found?

(a) Lysine
(b) Arginine
(c) Histidine
(d) Glutamate

Q4. Which of these are rare amino acid in a protein?

(a) Leucine and serine
(b) Lysine and glutamic acid
(c) Tryptophan and methionine
(d) Leucine and lysine

Q5. Name the amino acid, which exists in two non-superimposable mirror images of each other.

(a) Epimer
(b) Anomer
(c) Enantiomer
(d) Chiral carbon

Q6. A solution of L-alanine (4.0g/50 ml of 6 N HCl) has a rotation of +1.61? in a 2dm polarimeter tube. Calculate the specific rotation of L-alanine in 6 N HCl.

(a) +15.1?
(b) +10.1?
(c) +11.1?
(d) +16.1?

Q7. Which of these are used to measure optical activity?

(a) Polarimeter
(b) Planometer
(c) Psychrometer
(d) Photometer

Q8. Which of these amino acids are not optically active?

(a) Cysteine
(b) Lysine
(c) Arginine
(d) Glycine

Q9. An amino acid is an amphoteric molecule.

(a) True
(b) False
(c)
(d)

Q10. The general structure of all amino acids are same except for ___________

(a) Lysine
(b) Glycine
(c) Proline
(d) Alanine


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In An Alkaline Medium, Glycine Predominantly Exist As/in A/an

Modified 299 Year Ago

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299 Year Ago

In An Alkaline Medium, Glycine Predominantly Exist As/in A/an

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253 views

Which One Of The Following Statements Is Correct?

Modified 299 Year Ago

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299 Year Ago

Which One Of The Following Statements Is Correct?

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241 views

Polysaccharides Have - Linkage.

Modified 299 Year Ago

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299 Year Ago

Polysaccharides Have - Linkage.

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240 views

Hydrolysis Of Proteins Give:

Modified 299 Year Ago

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299 Year Ago

Hydrolysis Of Proteins Give:

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A Carbohydrate Is Treated With A-naphthol And Conc. H2SO4. What Colour Will Be Formed At The Junction Of Two Liquids?

Modified 360 Year Ago

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360 Year Ago

A Carbohydrate Is Treated With A-naphthol And Conc. H2SO4. What Colour Will Be Formed At The Junction Of Two Liquids?

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0 Answer
218 views

Glucose Molecule Reacts With X Number Of Molecules Of Phenyl Hydrazine To Yield Osazone. The Value Of X Is

Modified 360 Year Ago

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360 Year Ago

Glucose Molecule Reacts With X Number Of Molecules Of Phenyl Hydrazine To Yield Osazone. The Value Of X Is

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