I29-32

Question

DNA (Deoxyribonucleic Acid) is a molecule that contains the genetic instructions necessary for the growth, development, functioning, and reproduction of all known living organisms. DNA is a long, double-stranded molecule composed of four nucleotide building blocks: adenine (A), cytosine (C), guanine (G), and thymine (T). The structure of DNA is often referred to as a double helix, where two strands of DNA are wound together in a spiral shape, with the nucleotide bases forming pairs and connecting the two strands. Adenine pairs with thymine (A-T), and cytosine pairs with guanine (C-G), held together by hydrogen bonds. This base-pairing arrangement allows DNA to carry and store genetic information in the sequence of its nucleotide bases, which form a genetic code. DNA carries the genetic information that determines an organism's inherited traits from one generation to the next through a process called DNA replication and cell division.RNA (Ribonucleic Acid) is a molecule that plays a crucial role in the synthesis of proteins in living organisms. Like DNA, RNA is a nucleic acid made up of a chain of nucleotide building blocks, but it has some important differences in structure and function compared to DNA. The structure of RNA is typically single-stranded. The four nucleotide bases in RNA are adenine (A), cytosine (C), guanine (G), and uracil (U), which replaces thymine (T) found in DNA.The table below compares RNA and DNA across key biological features.
      Feature   RNA   DNA       Structure   Single-stranded   Double-stranded       Sugar   Ribose   Deoxyribose       Bases   Adenine (A), Uracil (U), Cytosine (C), Guanine (G)   Adenine (A), Thymine (T), Cytosine (C), Guanine (G)       Function   Translates genetic information from DNA into proteins   Stores genetic information and carries instructions for protein synthesis       Location   Found in nucleus and cytoplasm of cells   Found primarily in the nucleus of cells, with a small amount in mitochondria       Stability   Less stable, prone to degradation   More stable, less prone to degradation       Role in Genetic Code   Intermediary between DNA and proteins   Carries the genetic information       Genetic Material   Found in some viruses and also in cells of all living organisms   Found in the nucleus of cells in most living organisms

Bunuel · Answer

Official Solution:

The four nucleotide bases in RNA are adenine (A), cytosine (C), guanine (G), and uracil (U), which replaces thymine (T) found in DNA. 
 
• Tab 2 states that RNA contains uracil, which replaces thymine found in DNA. Thus, this statement is correct.
 
 DNA and RNA are typically double-stranded molecules. 
 
• Tab 2 states that RNA is typically single-stranded, while Tab 1 states that DNA is double-stranded. Thus, this statement is incorrect.
 
 DNA is less stable than RNA. 
 
• Tab 3 states that DNA is more stable and RNA is less stable. Thus, this statement is incorrect.

Correct answer:

The four nucleotide bases in RNA are adenine (A), cytosine (C), guanine (G), and uracil (U), which replaces thymine (T) found in DNA.  "Correct"

DNA and RNA are typically double-stranded molecules.  "Incorrect"

DNA is less stable than RNA.  "Incorrect"

I29-32

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

Feature	RNA	DNA
Structure	Single-stranded	Double-stranded
Sugar	Ribose	Deoxyribose
Bases	Adenine (A), Uracil (U), Cytosine (C), Guanine (G)	Adenine (A), Thymine (T), Cytosine (C), Guanine (G)
Function	Translates genetic information from DNA into proteins	Stores genetic information and carries instructions for protein synthesis
Location	Found in nucleus and cytoplasm of cells	Found primarily in the nucleus of cells, with a small amount in mitochondria
Stability	Less stable, prone to degradation	More stable, less prone to degradation
Role in Genetic Code	Intermediary between DNA and proteins	Carries the genetic information
Genetic Material	Found in some viruses and also in cells of all living organisms	Found in the nucleus of cells in most living organisms

Correct	Incorrect
		The four nucleotide bases in RNA are adenine (A), cytosine (C), guanine (G), and uracil (U), which replaces thymine (T) found in DNA.
		DNA and RNA are typically double-stranded molecules.
		DNA is less stable than RNA.