The statements about nucleic acids are as follows:

(i) Synthesis of nucleic acid is from 5' end to 3' end during replication or transcription. - This statement is correct. The synthesis of nucleic acids indeed occurs from the 5' end to the 3' end during replication or transcription.

(ii) DNA contains adenine, thymine, guanine and cytosine nitrogenous base and ribose pentose sugar. - This statement is incorrect. DNA does contain adenine, thymine, guanine, and cytosine as nitrogenous bases, but it contains deoxyribose, not ribose, as the pentose sugar.

(iii) RNA contains adenine uracil, guanine and cytosine nitrogenous base and ribose pentose sugar. - This statement is correct. RNA contains adenine, uracil, guanine, and cytosine as nitrogenous bases and ribose as the pentose sugar.

(iv) Secondary structure of DNA is double Helix structure which has hydrogen bonds. - This statement is correct. The secondary structure of DNA is indeed a double helix, and the two strands are held together by hydrogen bonds.

(v) RNA exist as single strand. - This statement is correct. RNA typically exists as a single strand, although there are exceptions.

(vi) r-RNA is the structural part of ribosome. - This statement is correct. Ribosomal RNA (rRNA) is indeed a structural component of the ribosome.

(vii) α-helix and β-pleated sheet are secondary structure of DNA. - This statement is incorrect. The α-helix and β-pleated sheet are secondary structures of proteins, not DNA.

So, out of the seven statements, five are correct.

Question

The statements about nucleic acids are as follows:

(i) Synthesis of nucleic acid is from 5' end to 3' end during replication or transcription. - This statement is correct. The synthesis of nucleic acids indeed occurs from the 5' end to the 3' end during replication or transcription.

(ii) DNA contains adenine, thymine, guanine and cytosine nitrogenous base and ribose pentose sugar. - This statement is incorrect. DNA does contain adenine, thymine, guanine, and cytosine as nitrogenous bases, but it contains deoxyribose, not ribose, as the pentose sugar.

(iii) RNA contains adenine uracil, guanine and cytosine nitrogenous base and ribose pentose sugar. - This statement is correct. RNA contains adenine, uracil, guanine, and cytosine as nitrogenous bases and ribose as the pentose sugar.

(iv) Secondary structure of DNA is double Helix structure which has hydrogen bonds. - This statement is correct. The secondary structure of DNA is indeed a double helix, and the two strands are held together by hydrogen bonds.

(v) RNA exist as single strand. - This statement is correct. RNA typically exists as a single strand, although there are exceptions.

(vi) r-RNA is the structural part of ribosome. - This statement is correct. Ribosomal RNA (rRNA) is indeed a structural component of the ribosome.

(vii) α-helix and β-pleated sheet are secondary structure of DNA. - This statement is incorrect. The α-helix and β-pleated sheet are secondary structures of proteins, not DNA.

So, out of the seven statements, five are correct.

Knowee AI · Accepted Answer

The statements about nucleic acids are as follows:

(i) Synthesis of nucleic acid is from 5' end to 3' end during replication or transcription. - This statement is correct. The synthesis of nucleic acids indeed occurs from the 5' end to the 3' end during replication or transcription.

(ii) DNA contains adenine, thymine, guanine and cytosine nitrogenous base and ribose pentose sugar. - This statement is incorrect. DNA does contain adenine, thymine, guanine, and cytosine as nitrogenous bases, but it contains deoxyribose, not ribose, as the pentose sugar.

(iii) RNA contains adenine uracil, guanine and cytosine nitrogenous base and ribose pentose sugar. - This statement is correct. RNA contains adenine, uracil, guanine, and cytosine as nitrogenous bases and ribose as the pentose sugar.

(iv) Secondary structure of DNA is double Helix structure which has hydrogen bonds. - This statement is correct. The secondary structure of DNA is indeed a double helix, and the two strands are held together by hydrogen bonds.

(v) RNA exist as single strand. - This statement is correct. RNA typically exists as a single strand, although there are exceptions.

(vi) r-RNA is the structural part of ribosome. - This statement is correct. Ribosomal RNA (rRNA) is indeed a structural component of the ribosome.

(vii) α-helix and β-pleated sheet are secondary structure of DNA. - This statement is incorrect. The α-helix and β-pleated sheet are secondary structures of proteins, not DNA.

So, out of the seven statements, five are correct.

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