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

Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present?

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प्रश्न

Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present?

विकल्प

  • 5′ and 3'

  • 1′ and 5′

  • 5′ and 5′

  • 3′ and 3′

MCQ
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उत्तर

5′ and 3'

Explanation:

Nucleotides are joined together by phosphodiester linkage between 5' and 3' carbon atoms of the pentose sugar.

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अध्याय 14: Biomolecules - Multiple Choice Questions (Type - I) [पृष्ठ २०४]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 14 Biomolecules
Multiple Choice Questions (Type - I) | Q 8 | पृष्ठ २०४

संबंधित प्रश्न

Discuss the optical activity of lactic acid.


What are the common types of secondary structure of proteins?


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 functional group participates in disulphide bond formation in proteins?


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.


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.


Peptide linkage is:


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:


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


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


An α-helix is a structural feature of ______.


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.


β-pleated sheet structure in proteins refers to ______.


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:


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