Tag: chemistry

Questions Related to chemistry

A nucleotide consists of

biochemical polymers polymerisation chemistry

  1. carbon sugar

  2. nitrogen containing base

  3. phosphoric acid

  4. All of the above

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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.

The sequence between nucleotide triplets and the amino acids is called

biochemical polymers polymerisation chemistry

  1. transcription

  2. duplication

  3. genetic code

  4. gene

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Correct Option: C
Explanation:

Genetic code is the sequence between nucleotide triplets and the amino acids. The whole phenomenon is called as Central Dogma. It's a really important phenomenon and a lot of cell organelles are involved : DNA, mRNA, Ribosomes, etc.

The genetic language of nucleotides translates into language of:

biochemical polymers polymerisation chemistry

  1. carboxylic acids

  2. amino acids

  3. ketones

  4. aldehydes

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Correct Option: B
Explanation:

During protein synthesis, the following process occurs:
The information stored in DNA is coded in the form of RNA in a process called transcription.
Next, the RNA code is processed in ribosomes and ultimately proteins (made of amino acids) are made. So, B is correct.

The sugar unit present in the nucleotides of RNA is :

biochemical polymers polymerisation chemistry

  1. D - ribulose.

  2. L - ribose.

  3. D - ribose.

  4. L - ribulose.

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Correct Option: C

Which of the following is not present in nucleotide?

biochemical polymers polymerisation chemistry

  1. guanine

  2. cytosine

  3. adenine

  4. tyroxine

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Correct Option: D
Explanation:

Tyroxine is not present in nucleotide. Nucleotide consists of adenine, guanine, cytosine, thymine, uracil, molecule of sugar and one of phosphoric acid.

The relationship between the nucleotide triplets and the amino acids is called:

biochemical polymers polymerisation chemistry

  1. translation

  2. transcription

  3. replication

  4. a genetic code

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Correct Option: D
Explanation:

The relationship between the nucleotide triplets and the amino acids is called a genetic code.
This determines the sequence of amino acids in the proteins that are synthesized.