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The incorrect statement in the following is:
- a)The nucleobase pairs are aligned perpendicular to the helical axis in DNA
- b)RNA contains Uralic and thymine, but DNA contains only thymine
- c)All naturally occurring amino acids with the exception of glycine are chiral
- d)All enzymes are proteins, but all proteins are not necessarily enzymes.
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
The incorrect statement in the following is:a)The nucleobase pairs are...
Incorrect Statement: RNA contains Uralic and thymine, but DNA contains only thymine.
Explanation:
Nucleobases are the building blocks of nucleic acids, which include DNA and RNA. The nucleobases in DNA and RNA are adenine (A), guanine (G), cytosine (C), and either thymine (T) in DNA or uracil (U) in RNA.
The incorrect statement is that RNA contains Uralic and thymine, but DNA contains only thymine. This statement is incorrect because:
- RNA contains uracil, not Uralic. Uralic is a language family spoken by people in Northern Europe and Asia, and has nothing to do with nucleobases.
- DNA contains thymine, not uracil. While uracil is found in RNA, it is not found in DNA. DNA uses thymine instead, which is chemically similar to uracil but has a methyl group added to it.
Correct Statements:
- The nucleobase pairs are aligned perpendicular to the helical axis in DNA: This statement is correct. The two strands of DNA are arranged in a double helix, with the nucleobases on each strand forming pairs with the nucleobases on the opposite strand. These pairs are held together by hydrogen bonds, and they are arranged perpendicular to the helical axis of the DNA molecule.
- All naturally occurring amino acids with the exception of glycine are chiral: This statement is correct. Amino acids are the building blocks of proteins, and they are chiral molecules. This means that they exist in two mirror-image forms, called enantiomers. All naturally occurring amino acids except glycine have a chiral center, which means they can exist in two forms that are non-superimposable mirror images of each other.
- All enzymes are proteins, but all proteins are not necessarily enzymes: This statement is correct. Enzymes are a type of protein that catalyze chemical reactions in biological systems. However, not all proteins are enzymes. Proteins have many other functions in the body besides catalysis, such as structural support, transport, and signaling.
Explanation:
Nucleobases are the building blocks of nucleic acids, which include DNA and RNA. The nucleobases in DNA and RNA are adenine (A), guanine (G), cytosine (C), and either thymine (T) in DNA or uracil (U) in RNA.
The incorrect statement is that RNA contains Uralic and thymine, but DNA contains only thymine. This statement is incorrect because:
- RNA contains uracil, not Uralic. Uralic is a language family spoken by people in Northern Europe and Asia, and has nothing to do with nucleobases.
- DNA contains thymine, not uracil. While uracil is found in RNA, it is not found in DNA. DNA uses thymine instead, which is chemically similar to uracil but has a methyl group added to it.
Correct Statements:
- The nucleobase pairs are aligned perpendicular to the helical axis in DNA: This statement is correct. The two strands of DNA are arranged in a double helix, with the nucleobases on each strand forming pairs with the nucleobases on the opposite strand. These pairs are held together by hydrogen bonds, and they are arranged perpendicular to the helical axis of the DNA molecule.
- All naturally occurring amino acids with the exception of glycine are chiral: This statement is correct. Amino acids are the building blocks of proteins, and they are chiral molecules. This means that they exist in two mirror-image forms, called enantiomers. All naturally occurring amino acids except glycine have a chiral center, which means they can exist in two forms that are non-superimposable mirror images of each other.
- All enzymes are proteins, but all proteins are not necessarily enzymes: This statement is correct. Enzymes are a type of protein that catalyze chemical reactions in biological systems. However, not all proteins are enzymes. Proteins have many other functions in the body besides catalysis, such as structural support, transport, and signaling.
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The incorrect statement in the following is:a)The nucleobase pairs are aligned perpendicular to the helical axis in DNAb)RNA contains Uralic and thymine, but DNA contains only thyminec)All naturally occurring amino acids with the exception of glycine are chirald)All enzymes are proteins, but all proteins are not necessarily enzymes.Correct answer is option 'B'. Can you explain this answer?
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