Nucleic Acids and DNA Structure Class XI

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Questions and Answers

What is the primary function of DNA in most organisms?

Acting as a messenger
Serving as the genetic material (correct)
Catalyzing biochemical reactions
Providing structural support

Which role is NOT typically associated with RNA?

Catalyzing chemical reactions
Serving as a messenger
Acting as a structural molecule
Storing genetic information (correct)

What process involves making RNA from DNA?

Recombination
Transcription (correct)
Replication
Translation

In which type of organism does RNA function primarily as genetic material?

<p>Viruses (B)</p> Signup and view all the answers

Which of the following processes is involved in protein synthesis?

<p>Both transcription and translation (C)</p> Signup and view all the answers

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Flashcards

What is DNA?

Deoxyribonucleic acid (DNA) is a type of nucleic acid that serves as the genetic material in most living organisms.

What is RNA?

Ribonucleic acid (RNA) is another type of nucleic acid that plays a crucial role as a messenger, carrying genetic information from DNA to the protein-making machinery of the cell.

Does RNA ever act as genetic material?

Unlike DNA, RNA also acts as a genetic material in some viruses. This means that for these viruses, RNA contains their genetic code.

What is DNA replication?

DNA replication refers to the process of copying the DNA molecule, ensuring that each new cell receives a complete and accurate copy of the genetic information.

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What is transcription?

Transcription is the process of making RNA from a DNA template. This is the first step in gene expression, where the genetic information encoded in DNA is converted into a form that can be used to make proteins.

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Study Notes

Nucleic Acids

DNA and RNA are two types of nucleic acids in living organisms.
DNA is the genetic material in most organisms.
RNA is the genetic material in some viruses, but mostly acts as a messenger.
RNA also has other roles: adapter, structural, and catalytic.
Nucleotide structures and their linking into nucleic acid polymers were covered in Class XI.