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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Optical rotations of some compounds along with their structures are given below which of them have D configuration.

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प्रश्न

Optical rotations of some compounds along with their structures are given below which of them have D configuration.

(I)
(II)
(III)

पर्याय

  • I, II, III

  • II, III

  • I, II

  • III

MCQ
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उत्तर

I, II, III

Explanation:

I, II and III structures have D configuration with –OH group on the lowest asymmetric carbon is on the right side which is comparable to (+) glyceraldehyde.

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पाठ 14: Biomolecules - Multiple Choice Questions (Type - I) [पृष्ठ २०६]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 14 Biomolecules
Multiple Choice Questions (Type - I) | Q 17 | पृष्ठ २०६

संबंधित प्रश्‍न

How are proteins classified on the basis of molecular shapes?


What is peptide linkage?


How is tripeptide formed?


Differentiate between  the following:

Fibrous proteins and Globular proteins


Write one difference between α-helix and β-pleated structures of proteins.


Differentiate between the following :

Peptide linkage and Glycosidic linkage 


Which of the following statement is correct:


Proteins are found to have two different types of secondary structures viz. α-helix and β-pleated sheet structure. α-helix structure of protein is stabilised by:


In fibrous proteins, polypeptide chains are held together by:

(i) van der Waals forces

(ii) disulphide linkage

(iii) electrostatic forces of attraction

(iv) hydrogen bonds


Which of the following are purine bases?

(i) Guanine

(ii) Adenine

(iii) Thymine

(iv) Uracil


Protein found in a biological system with a unique three-dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in pH, denaturation of protein takes place. Explain the cause.


The main structural feature of proteins is


Peptide linkage is:


Presence of disulphide link gives rise to which structure of protein?


The total number of negative charge in the tetrapeptide, Gly-Glu-Asp-Tyr at pH 12.5 will be ______. (Integer answers)


Assertion (A): Proteins are polymers of α-amino acids connected by a peptide bond.

Reason (R): A tetrapeptide contains 4 amino acids linked by 4 peptide bonds.


Statement I: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and the right end represented by last amino acid (Nterminal).

Statement II: Adult human haemoglobin, consists of 4 subunits (two subunits of a type and two subunits β type.)

In the light of the above statements, choose the correct answer from the options given below:


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