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Nucleotides are formed by

Question

Easy

Solving time: 1 mins

Nucleotides are formed by

Purine, sugar and phosphate

Purine, pyrimidine and phosphate

Purine or pyrimidine, sugar and phosphate

Pyrimidine, sugar and phosphate

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Text solutionVerified

The nucleotide is formed by the union of a phosphate group with a nucleoside. A nucleoside contains a sugar molecule along with an organic nitrogenous base. Thus, a nucleotide contains a organic nitrogenous base (purine or pyrimidine) along with a sugar molecule and a phosphate group,
Nucleoside=Sugar molecule+Organic nitrogenous base.
Nucleotide=Nucleoside+Phosphate group

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Practice more questions from Biomolecules

Question 1

Hard

Assertion : Enzymes are defined as biological proteins.
Reason : Chemically all enzymes are globular proteins.

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true but Reason is false.
If both Assertion and Reason are false.

Topic:

Biomolecules

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Question 2

Easy

Complete the missing links :
1. Fats are made of ________ and ________
2. ________ and ________ are purine nitrogenous bases.
3. ________ is cofactor in enzyme cytochrome oxidase.
4. A true fat with three molecules of fatty acids is called ________ .
5. Three pyrimidines are thymine, cytosine and ________ .
6. DNA has ________ instead of uracil.
7. rRNA is associated with ________ .
8. Keratin is ________ a protein.
9. Double helical structure is found in ________ .
10. The carbohydrate molecule cellulose is a ________.
11. The double helix model of DNA was proposed by ________ and ________ .
12.________ and ________ are storage polysaccharides.
13. When amino acid chain is arranged like a coil, it is called an

α

________.
14. Chitin is a polysaccharide found in the ...................... of crabs and prawn etc.
15. The kind of protein which can enhance the efficiency of a biochemical reaction is called an ________ .
16. The substances which stop or slow down the reaction are called ........................
17. A protein molecule has at least 200 to 300 ...................... linkages.
18. The enzymes which break down proteins into amino acid molecules are called as ...................... .
19. When the enzymes with slightly different molecular structure can also perform the identical activities, they are called as ..................... .
20. When the production of the cell is inhibited by its own metabolites, this control is termed as ________ .
21. Biochemical reactions are regulated by catalysts called ...................... .
22. A vitamin is often associated as a with ________ an enzyme.
23. The molecules on which enzymes act are known as ________.
24. Enzymes which breakdown compounds without the involvement of water are called ________ .
25. A compound with almost similar structure to the substrate can act as a ________ .
26. The functions of enzymes is to lower the ________ of biochemical reactions.
27. The enzymatic activity stops due ________ to of enzymes at very high temperature.
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29. ________ catalyse covalent bonding between two molecules to form a large molecule.

Topic:

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Book:

Modern ABC Biology Class 11 Part 1 (Modern ABC)

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Question 3

Easy

Enzymes are the polymers of:

Hexose carbon
Fatty acids
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Inorganic phosphate

Topic:

Biomolecules

Book:

Precalculus

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Question 4

Medium

Assertion (A) In the solutions of different pH, structure of amino acids changes.
Reason (R) It is because of the ionisable nature of -NH

_{2}

and -COOH groups.

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true but Reason is false.
If both Assertion and Reason are false.

Topic:

Biomolecules

View solution