Most common element present in human body is:

1. Oxygen 2. Carbon
3. Hydrogen 4. Sulfur
Subtopic:  Element Analysis |
 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The molecule shown in the given figure:

1. is a substituted purine found in DNA
2. is a substituted purine found in RNA
3. is a substituted pyrimidine found in DNA
4. is a substituted pyrimidine found in RNA
Subtopic:  Element Analysis |
 76%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

What are thymidine, uridine, and cytidine? 
1. Purines
2. Pyrimidines 
3. Nucleosides 
4. Nucleotides 
Subtopic:  Element Analysis | Nucleic Acid: Nucleotides |
 61%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

The true macromolecular fraction of any living tissue or cell includes all the following except:
1. polynucleotides
2. lipids
3. polysaccharides
4. polypeptides
Subtopic:  Element Analysis |
 88%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

The molecules in the acid insoluble fraction of a cell:
1. have molecular weights ranging from 18 to around 800 daltons (Da) approximately.
2. include lipids.
3. are all polymeric substances.
4. correspond to the cytoplasm of a typical cell.
Subtopic:  Element Analysis |
 72%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

If we represent the chemical composition of living tissue from abundance point of view and arrange them class-wise, the second most abundant chemical in living organisms is:
1. Water
2. Protein
3. Carbohydrate
4. Nucleic acid
Subtopic:  Element Analysis |
 77%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

Consider the given two statements:

I: Lipids come under acid insoluble fraction.
II: Lipids are macromolecules.

1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
Subtopic:  Element Analysis |
 59%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.