Question

The macromolecule RNA is common to all living beings, and DNA, which is found in all organisms except some bacteria, is almost as ............... 

• A. comprehensive
• B. fundamental
• C. inclusive
• D. universal
• E. significant
• F. ubiquitous

Hint:

When discussing something that is present everywhere, "universal" or "ubiquitous" are often the best choices.

Answer 1

The Correct Option is D

Step 1: Understand the context. 
The passage compares RNA, which is common to all living organisms, with DNA, which is also almost universal, excluding a few exceptions. 
Step 2: Analyze the options. 
- (A): “Comprehensive” is not fitting because it implies coverage of all aspects, which is not the intended meaning. 
- (B): “Fundamental” doesn’t capture the idea of being universally present. 
- (C): “Inclusive” is too weak to express universal presence. 
- (D): “Universal” fits perfectly, meaning present everywhere. 
- (E): “Significant” doesn’t work because it refers to importance, not presence. 
- (F): “Ubiquitous” also fits as it implies being everywhere. 
Step 3: Conclusion. 
Both “universal” and “ubiquitous” fit well.