#B-DNA

DNA

Which pentose puckering is found in B-DNA?

C2'-endo is the correct answer as it accurately identifies the biological location, composition, or distribution described in this question. In Nucleic Acid, the spatial organization and localization of molecules are critical to their function. C2'-endo is specifically associated with the structure or compartment mentioned because of its unique biochemical properties and physiological role. The other options (C3'-endo, C2'-exo, and C3'-exo) are primarily associated with different cellular compartments, tissues, or structural contexts.

Ref: Campbell Biology, Urry et al., 12th Ed.

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DNA

Which of the following properties differentiates A-DNA from B-DNA?

All of the above is the scientifically accurate answer to this question. Within the study of DNA, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of All of the above directly address what is being asked. Among the other options, Number of base pairs per turn, Major groove width, and Sugar puckering do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions abou

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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DNA

Which form of DNA has the largest pitch per turn?

Z-DNA is the scientifically accurate answer to this question. Within the study of DNA, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Z-DNA directly address what is being asked. Among the other options, A-DNA, B-DNA, and Triplex DNA do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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DNA

Which of the following interactions plays a major role in stabilizing B-DNA?

Stacking interactions is the accurate answer because it correctly identifies the biological function or role described in this question. In DNA, understanding the specific functions of molecules, enzymes, or structures is fundamental. Stacking interactions fulfills this particular biological role through its specific structural properties, biochemical activity, or physiological mechanism. The other options (Hydrogen bonding, Hydrophobic interactions, and Ionic interactions) serve different biological functions or are associated with other processes, pathways, or structural roles within the cel

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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DNA

What is the diameter of B-DNA?

20Ã… accurately defines or describes the concept asked in this question. Within DNA, precise definitions and terminology are essential for clear scientific communication. The other options (26Ã…, 18Ã…, and 24.6Ã…) either describe related but distinct concepts, use incorrect terminology, or confuse similar-sounding terms that have different scientific meanings. A thorough understanding of exact definitions helps distinguish between closely related biological concepts and is crucial for competitive examinations.

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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DNA

Which DNA form has the highest base pair per turn?

Z-DNA is the scientifically accurate answer to this question. Within the study of DNA, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Z-DNA directly address what is being asked. Among the other options, A-DNA, B-DNA, and H-DNA do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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DNA

In B-DNA, the sugar adopts which conformation?

C2'-endo is the scientifically accurate answer to this question. Within the study of DNA, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of C2'-endo directly address what is being asked. Among the other options, C3'-endo, C5'-exo, and C3'-exo do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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DNA

The B-DNA helix contains how many base pairs per turn?

10.5 accurately describes the structural composition or molecular organization asked about in this question. In DNA, knowledge of molecular structure is directly linked to understanding biological function. The specific arrangement of chemical components in 10.5 determines its physical properties, biological activity, and interactions with other molecules. The other options (9, 11, and 12) describe different structural arrangements, incorrect stoichiometry, or compositions of different biological molecules.

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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DNA

What is the helical pitch of B-DNA?

34 Ã… accurately defines or describes the concept asked in this question. Within DNA, precise definitions and terminology are essential for clear scientific communication. The other options (20 Ã…, 3.4 Ã…, and 24.6 Ã…) either describe related but distinct concepts, use incorrect terminology, or confuse similar-sounding terms that have different scientific meanings. A thorough understanding of exact definitions helps distinguish between closely related biological concepts and is crucial for competitive examinations.

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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DNA

Which type of DNA has the widest major groove?

B-DNA is the accurate classification or categorization for the organism, molecule, or concept described in this question. In DNA, proper classification is based on shared characteristics including morphological, biochemical, genetic, and evolutionary criteria. B-DNA meets the specific diagnostic features and defining criteria that distinguish it from related groups. The other options (A-DNA, Z-DNA, and H-DNA) belong to different taxonomic groups, represent different classification levels, or possess distinct characteristics that exclude them from this category.

Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.

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