Tag: polymerisation

Questions Related to polymerisation

Which of the following is correxect bonding in nucleotide?

biochemical polymers polymerisation chemistry

  1. $A - T, \ G - C$

  2. $A - G,\ T - C$

  3. $G - T,\ A - C$

  4. $A - A,\ T - T$

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Correct Option: A
Explanation:

The correct bonding pairs in Nucleotide are Adenine- Thymine, Guanine- Cytosine where Adenine, Thymine, Guanine, Cytosine are bases which form in pairs to build up Nucleotides.

A unit in nucleic acid which contains 'base-sugar phosphate' unit is called ?

biochemical polymers polymerisation chemistry

  1. nuleotide

  2. nucleoside

  3. phosphotide

  4. polypeptide

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Correct Option: A
Explanation:
Nucleotides are composed of three sub-unit molecules: a nitrogenous base, a five-carbon sugar (ribose or deoxyribose), and at least one phosphate group.

Which of the following bases is not present in DNA?

biochemical polymers polymerisation chemistry

  1. Adenine

  2. Thymine

  3. Cytosine

  4. Uracil

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Correct Option: D
Explanation:
In DNA, four bases have been found. They are adenine (A), guanine (G), cytosine (C) and thymine (T).
Uracil is present in RNA.

The $AT/GC$ ratio in human beings is: (where $A=$adenine,$T=$thymine,$G=$Guanine,$C=$cytosine)

biochemical polymers polymerisation chemistry

  1. $1$

  2. $1.52$

  3. $9.3$

  4. $2$

Show answer
Correct Option: B
Explanation:

A-T/G-C ratio is human beings is equal to 1.52

where A=Adenine T-Thymine, G-Guanine, C-Cytosine

RNA is ?

biochemical polymers polymerisation chemistry

  1. single helix strand

  2. double helix strand

  3. right hand twisted double helix strand

  4. triple helix strand

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Correct Option: A
Explanation:
RNA is a single-stranded molecule in many of its biological roles and consists of a much shorter chain of nucleotides. 

A nucleotide consists of

biochemical polymers polymerisation chemistry

  1. carbon sugar

  2. nitrogen containing base

  3. phosphoric acid

  4. All of the above

Show answer
Correct Option: D
Explanation:

A nucleotide is made up of the following
Sugar ring, base (adenine, guanine, cytosine, thymine/uracil), phosphate molecule.
The sugar ring is made up of carbon atoms. The bases are nitrogenous. So, all of these are true.

The replication of DNA can be catalyzed by:

biochemical polymers polymerisation chemistry

  1. protein

  2. enzyme

  3. bacteria

  4. metal atom

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Correct Option: B
Explanation:

The replication of $DNA$ can catalyzed by an enzyme. Many enzymes are involved during this process such as DNA helicase, DNA ligase, DNA polymerase etc. Each enzyme has a specific function during replication.

Emperical formula of glucose is 

biochemical polymers polymerisation chemistry

  1. ${C _6}{H _{12}}{O _6}$

  2. $\;{C _3}{H _6}{O _3}\;$

  3. $\;{C _2}{H _4}O\;\;\;\;$

  4. $C{H _2}O$

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Correct Option: D

Which among the following sequence defines Ribonucleotide?

biochemical polymers polymerisation chemistry

  1. Ribose sugar $+$ Nitrogenous base

  2. Ribose sugar $+$ Protein

  3. Ribose sugar $+$ Phosphoric acid

  4. Ribonucleoside $+$ Phosphate group

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Correct Option: A

A nucleotide is made up of:

biochemical polymers polymerisation chemistry

  1. a base and sugar

  2. a base and phosphate unit

  3. a sugar and phosphate unit

  4. a sugar, a base and a phosphate unit

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Correct Option: D
Explanation:

Sugar + Base + a phosphate unit constitute one nucleotide.
This is the definition of a nucleotide.