IIT JAM Exam > IIT JAM Questions > Which of the following statement is truea)RNA...
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Which of the following statement is true
- a)RNA is locally double stranded
- b)DNA on denaturation breaks into nucleotides
- c)DNA is always double stranded
- d)RNA is not the genetic material
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Which of the following statement is truea)RNA is locally double strand...
Option (a) is correct.
In secondary conformation, naturally occurring RNA mostly adopt local pairing of complementary base pairs.
Option (b) is incorrect.
During DNA denaturation, double stranded DNA unwinds and separates into single strands. The temperature at which the DNA strands are half denatured is called the melting temperature (Tm).
In secondary conformation, naturally occurring RNA mostly adopt local pairing of complementary base pairs.
Option (b) is incorrect.
During DNA denaturation, double stranded DNA unwinds and separates into single strands. The temperature at which the DNA strands are half denatured is called the melting temperature (Tm).
Option (c) is incorrect.
The DNA molecules are not always double stranded helical structures. Sometimes they occur in single stranded form also called as single stranded DNA (ssDNA). DNA in ssDNA form is present in very few viruses.
Option (d) is incorrect.
RNA is a genetic material in many viruses. Human diseases caused by RNA viruses [virus that has RNA as genetic material] include rabies, common cold, hepatitis C.
The DNA molecules are not always double stranded helical structures. Sometimes they occur in single stranded form also called as single stranded DNA (ssDNA). DNA in ssDNA form is present in very few viruses.
Option (d) is incorrect.
RNA is a genetic material in many viruses. Human diseases caused by RNA viruses [virus that has RNA as genetic material] include rabies, common cold, hepatitis C.
Most Upvoted Answer
Which of the following statement is truea)RNA is locally double strand...
**Answer:**
**Introduction:**
DNA (Deoxyribonucleic acid) and RNA (Ribonucleic acid) are two types of nucleic acids that are essential for the storage and transfer of genetic information in living organisms. While they have many similarities, they also have some important differences.
**Statement:**
The correct statement is option 'A': RNA is locally double-stranded.
**Explanation:**
**1. DNA Structure:**
- DNA is a double-stranded molecule that forms a double helix structure.
- It consists of two antiparallel strands of nucleotides.
- Each nucleotide is composed of a sugar molecule (deoxyribose), a phosphate group, and one of four nitrogenous bases (adenine, thymine, cytosine, or guanine).
- The two strands of DNA are held together by hydrogen bonds between complementary base pairs: adenine (A) with thymine (T) and cytosine (C) with guanine (G).
**2. RNA Structure:**
- RNA is a single-stranded molecule that does not form a double helix structure.
- It also consists of nucleotides, but the sugar molecule is ribose instead of deoxyribose.
- The nitrogenous bases in RNA are adenine (A), uracil (U) (instead of thymine), cytosine (C), and guanine (G).
**3. Locally Double-Stranded RNA:**
- While RNA is generally single-stranded, it can form short regions of double-stranded structure through complementary base pairing.
- These regions are called hairpin loops or stem-loop structures.
- Hairpin loops occur when a single RNA strand folds back on itself and forms base pairs with complementary nucleotides.
- The bases involved in the base pairing are usually in close proximity to each other within the same RNA molecule.
- The double-stranded regions are stabilized by hydrogen bonds, similar to the ones in DNA.
- These local double-stranded structures in RNA are important for various biological processes, such as gene regulation and protein synthesis.
**Conclusion:**
In conclusion, the correct statement is option 'A': RNA is locally double-stranded. While DNA is always double-stranded, RNA can form short regions of double-stranded structure through hairpin loops or stem-loop structures.
**Introduction:**
DNA (Deoxyribonucleic acid) and RNA (Ribonucleic acid) are two types of nucleic acids that are essential for the storage and transfer of genetic information in living organisms. While they have many similarities, they also have some important differences.
**Statement:**
The correct statement is option 'A': RNA is locally double-stranded.
**Explanation:**
**1. DNA Structure:**
- DNA is a double-stranded molecule that forms a double helix structure.
- It consists of two antiparallel strands of nucleotides.
- Each nucleotide is composed of a sugar molecule (deoxyribose), a phosphate group, and one of four nitrogenous bases (adenine, thymine, cytosine, or guanine).
- The two strands of DNA are held together by hydrogen bonds between complementary base pairs: adenine (A) with thymine (T) and cytosine (C) with guanine (G).
**2. RNA Structure:**
- RNA is a single-stranded molecule that does not form a double helix structure.
- It also consists of nucleotides, but the sugar molecule is ribose instead of deoxyribose.
- The nitrogenous bases in RNA are adenine (A), uracil (U) (instead of thymine), cytosine (C), and guanine (G).
**3. Locally Double-Stranded RNA:**
- While RNA is generally single-stranded, it can form short regions of double-stranded structure through complementary base pairing.
- These regions are called hairpin loops or stem-loop structures.
- Hairpin loops occur when a single RNA strand folds back on itself and forms base pairs with complementary nucleotides.
- The bases involved in the base pairing are usually in close proximity to each other within the same RNA molecule.
- The double-stranded regions are stabilized by hydrogen bonds, similar to the ones in DNA.
- These local double-stranded structures in RNA are important for various biological processes, such as gene regulation and protein synthesis.
**Conclusion:**
In conclusion, the correct statement is option 'A': RNA is locally double-stranded. While DNA is always double-stranded, RNA can form short regions of double-stranded structure through hairpin loops or stem-loop structures.
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Which of the following statement is truea)RNA is locally double strandedb)DNA on denaturation breaks into nucleotidesc)DNA is always double strandedd)RNA is not the genetic materialCorrect answer is option 'A'. Can you explain this answer?
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