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Read the following and answer any four questions from 2(i) to 2(v) given below: In prokaryotes, DNA is circular and present in the cytoplasm but in eukaryotes, DNA is linear and mainly confined to the nucleus. DNA or deoxyribonucleic acid is a long polymer of nucleotides. In 1953, the first correct double helical structure of DNA was worked out by Watson and Crick. Based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. It is composed of three components, i.e., A phosphate group, a deoxyribose sugar and a nitrogenous base. Different forms of DNA are B-DNA, Z-DNA, A-DNA, C-DNA and D-DNA.
The double chain of B-DNA is coiled in a helical fashion. Ihe spiral twisting of B-DNA duplex produces
  • a)
    right and left part
  • b)
    major and minor grooves
  • c)
    upper and lower sides
  • d)
    linear and circular part.
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Read the following and answer any four questions from 2(i) to 2(v) gi...
Due to spiral twisting, the B-DNA duplex comes to have two types of alternate grooves, Le.t major (length 22 A) and minor (length 12 A).
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Most Upvoted Answer
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Explanation:

Major and Minor Grooves in B-DNA Structure:
- The double helical structure of B-DNA consists of two polynucleotide chains running in opposite directions.
- These chains are held together by hydrogen bonds between complementary nitrogenous bases.
- The helix has a repeating pattern, and as it twists, it forms grooves along its length.

Major Groove:
- The major groove is the larger of the two grooves in the B-DNA structure.
- It is formed when the two strands of the DNA molecule are not perfectly symmetrical.
- Proteins that bind to DNA often interact with the bases through the major groove because it provides more access to the nitrogenous bases.

Minor Groove:
- The minor groove is the smaller of the two grooves in the B-DNA structure.
- It is formed when the two strands of the DNA molecule are closer together.
- Proteins can also interact with the bases through the minor groove, but it provides less access compared to the major groove.

Explanation of the Correct Answer:
- In the context of the question, the correct answer is option 'B' which refers to major and minor grooves.
- The major and minor grooves are essential features of the B-DNA structure that play a crucial role in protein-DNA interactions.
- Understanding the grooves helps in deciphering how proteins recognize specific DNA sequences and regulate gene expression.
- Therefore, the correct answer highlights the significance of major and minor grooves in the structural characteristics of B-DNA.
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Read the following and answer any four questions from 2(i) to 2(v) given below: In prokaryotes, DNA is circular and present in the cytoplasm but in eukaryotes, DNA is linear and mainly confined to the nucleus. DNA or deoxyribonucleic acid is a long polymer of nucleotides. In 1953, the first correct double helical structure of DNA was worked out by Watson and Crick. Based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. It is composed of three components, i.e., A phosphate group, a deoxyribose sugar and a nitrogenous base. Different forms of DNA are B-DNA, Z-DNA, A-DNA, C-DNA and D-DNA.The double chain of B-DNA is coiled in a helical fashion. Ihe spiral twisting of B-DNA duplex producesa)right and left partb)major and minor groovesc)upper and lower sidesd)linear and circular part.Correct answer is option 'B'. Can you explain this answer?
Question Description
Read the following and answer any four questions from 2(i) to 2(v) given below: In prokaryotes, DNA is circular and present in the cytoplasm but in eukaryotes, DNA is linear and mainly confined to the nucleus. DNA or deoxyribonucleic acid is a long polymer of nucleotides. In 1953, the first correct double helical structure of DNA was worked out by Watson and Crick. Based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. It is composed of three components, i.e., A phosphate group, a deoxyribose sugar and a nitrogenous base. Different forms of DNA are B-DNA, Z-DNA, A-DNA, C-DNA and D-DNA.The double chain of B-DNA is coiled in a helical fashion. Ihe spiral twisting of B-DNA duplex producesa)right and left partb)major and minor groovesc)upper and lower sidesd)linear and circular part.Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Read the following and answer any four questions from 2(i) to 2(v) given below: In prokaryotes, DNA is circular and present in the cytoplasm but in eukaryotes, DNA is linear and mainly confined to the nucleus. DNA or deoxyribonucleic acid is a long polymer of nucleotides. In 1953, the first correct double helical structure of DNA was worked out by Watson and Crick. Based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. It is composed of three components, i.e., A phosphate group, a deoxyribose sugar and a nitrogenous base. Different forms of DNA are B-DNA, Z-DNA, A-DNA, C-DNA and D-DNA.The double chain of B-DNA is coiled in a helical fashion. Ihe spiral twisting of B-DNA duplex producesa)right and left partb)major and minor groovesc)upper and lower sidesd)linear and circular part.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the following and answer any four questions from 2(i) to 2(v) given below: In prokaryotes, DNA is circular and present in the cytoplasm but in eukaryotes, DNA is linear and mainly confined to the nucleus. DNA or deoxyribonucleic acid is a long polymer of nucleotides. In 1953, the first correct double helical structure of DNA was worked out by Watson and Crick. Based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. It is composed of three components, i.e., A phosphate group, a deoxyribose sugar and a nitrogenous base. Different forms of DNA are B-DNA, Z-DNA, A-DNA, C-DNA and D-DNA.The double chain of B-DNA is coiled in a helical fashion. Ihe spiral twisting of B-DNA duplex producesa)right and left partb)major and minor groovesc)upper and lower sidesd)linear and circular part.Correct answer is option 'B'. Can you explain this answer?.
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