Which molecule carries genetic information in almost all living organisms and is commonly double-stranded?

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Prepare for the ECPI Anatomy and Physiology AandP Exam 1. Utilize multiple choice questions and flashcards with detailed explanations. Enhance your knowledge and be exam-ready!

Multiple Choice

Which molecule carries genetic information in almost all living organisms and is commonly double-stranded?

Explanation:
DNA stores genetic information in almost all living organisms and is typically double-stranded. The double-helix structure with two complementary strands enables accurate replication and repair, preserving the genetic code across generations. While RNA can carry genetic information in some viruses and often acts as a messenger in gene expression, it is usually single-stranded in living organisms and does not serve as the primary hereditary material. Proteins are products of gene expression, not the storage medium for genetic information, and lipids are not used to store genetic data. Thus, DNA is the molecule that most universally carries genetic information and is commonly double-stranded.

DNA stores genetic information in almost all living organisms and is typically double-stranded. The double-helix structure with two complementary strands enables accurate replication and repair, preserving the genetic code across generations. While RNA can carry genetic information in some viruses and often acts as a messenger in gene expression, it is usually single-stranded in living organisms and does not serve as the primary hereditary material. Proteins are products of gene expression, not the storage medium for genetic information, and lipids are not used to store genetic data. Thus, DNA is the molecule that most universally carries genetic information and is commonly double-stranded.

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