NEET Exam  >  NEET Questions  >  Which of the following is True about purine a... Start Learning for Free
 Which of the following is True about purine and pyrimidine bases?

  • a)
    They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cell

  • b)
    At acidic or alkaline pH the bases become charged and their solubility in water decreases

  • c)
    Purines have two rings in their structure, but pyrimidine bases have only one ring

  • d)
    At acidic or alkaline pH the bases become charged and their solubility in water increases

Correct answer is option 'A,C,D'. Can you explain this answer?
Verified Answer
Which of the following is True about purine and pyrimidine bases?a)The...
The purine and pyrimidine bases are hydrophobic and relatively insoluble in water at the near-neutral pH of the cell. At acidic or alkaline pH the bases become charged and their solubility in water increases.
View all questions of this test
Most Upvoted Answer
Which of the following is True about purine and pyrimidine bases?a)The...
Purine and Pyrimidine Bases

Introduction:
Purine and pyrimidine bases are two types of nitrogenous bases that are essential components of nucleotides, the building blocks of nucleic acids (DNA and RNA). These bases play a crucial role in the formation of DNA and RNA strands.

Distinguishing Characteristics:
Purine and pyrimidine bases have distinct characteristics that differentiate them from each other.

Purine Bases:
- Purine bases include adenine (A) and guanine (G).
- They have a double-ring structure consisting of a six-membered ring fused to a five-membered ring.
- The six-membered ring is derived from pyrimidine, while the five-membered ring contains nitrogen atoms.
- Purine bases are hydrophobic, meaning they are relatively insoluble in water at the near-neutral pH of the cell.

Pyrimidine Bases:
- Pyrimidine bases include cytosine (C), thymine (T), and uracil (U).
- They have a single-ring structure composed of a six-membered ring.
- Pyrimidine bases are also hydrophobic and relatively insoluble in water at the near-neutral pH of the cell.

pH Effect:
The pH of the surrounding environment can influence the solubility and charge of purine and pyrimidine bases.

At Near-Neutral pH:
- At the near-neutral pH of the cell, both purine and pyrimidine bases are hydrophobic and relatively insoluble in water.
- This property is crucial for their function in DNA and RNA, as it allows them to stack within the double helix structure and form hydrogen bonds with complementary bases.

At Acidic or Alkaline pH:
- When the pH becomes acidic or alkaline, the bases can become charged due to the presence of functional groups on their structures.
- The charged bases have increased solubility in water compared to their neutral forms.
- Therefore, at acidic or alkaline pH, the solubility of both purine and pyrimidine bases increases.

Summary:
In summary, purine and pyrimidine bases are hydrophobic and relatively insoluble in water at the near-neutral pH of the cell. Purines have two rings in their structure, while pyrimidine bases have only one ring. However, at acidic or alkaline pH, the bases become charged, leading to increased solubility in water.
Free Test
Community Answer
Which of the following is True about purine and pyrimidine bases?a)The...
How is option c wrong???
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Top Courses for NEET

Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer?
Question Description
Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer?.
Solutions for Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer?, a detailed solution for Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer? has been provided alongside types of Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Which of the following is True about purine and pyrimidine bases?a)They are hydrophobic and relatively insoluble in water at the near-neutral pH of the cellb)At acidic or alkaline pH the bases become charged and their solubility in waterdecreasesc)Purines have two rings in their structure, but pyrimidine bases have only one ringd)At acidic or alkaline pH the bases become charged and their solubility in water increasesCorrect answer is option 'A,C,D'. Can you explain this answer? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev