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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

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


The protein responsible for blood clotting is ____________.


The correct statement for protein haemoglobin.


Which functional group participates in disulphide bond formation in proteins?


α-Helix is a secondary structure of proteins formed by twisting of polypeptide chain into right-handed screw like structures. Which type of interactions are responsible for making the α-helix structure stable?


Which moieties of nucleosides are involved in the formation of phosphodiester linkages present in dinucleotides? What does the word diester in the name of linkage indicate? Which acid is involved in the formation of this linkage?


Assertion: β-glycosidic linkage is present in maltose,

Reason: Maltose is composed of two glucose units in which C–1 of one glucose unit is linked to C–4 of another glucose unit.


Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be ______.


Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion (A): Proteins are found to have two different types of secondary structures viz alpha-helix and beta-pleated sheet structure.

Reason (R): The secondary structure of proteins is stabilized by hydrogen bonding.

Select the most appropriate answer from the options given below:


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


Out of the following, which type of interaction is responsible for the stabilisation of the α-helix structure of proteins?


Proteins are polymers of ______.


β-pleated sheet structure in proteins refers to ______.


Write a classification of proteins with an example.


Match List I with List II:

List I List II
A. GLUT-4 I. Hormone
B. Insulin II. Enzyme
C. Trypsin III. Intercellular ground substance
D. Collagen IV. Enables glucose transport into cells

Choose the correct answer from the options given below:


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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