The Question is from neet-botany , and it was created by the author Mr. NARESH KUMAR K

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I. Which colour glycogen gives on its reaction with iodine solution?
II. What is satellite DNA?
III. Name three components of a nucleotide molecule
Correct option will all answers is

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Carbohydrate Chemistry, Molecular Biology
	**Related Topics**: Glycogen structure, DNA structure, Nucleotide composition
	**Prerequisites**: Basic knowledge of biomolecules.
## SOLUTION PATHWAY
**Given Information**:
	Three short-answer questions related to biomolecules.
**Method & Steps**:
	1. **Glycogen and Iodine Reaction:**
		Reasoning: Glycogen, a branched polysaccharide, forms a complex with iodine.
		Result: This complex produces a characteristic color change.
	2. **Satellite DNA:**
		Reasoning: Satellite DNA is a type of repetitive DNA sequence.
		Key Point: It differs in density from the bulk of genomic DNA.
	3. **Nucleotide Components:**
		Reasoning: Nucleotides are the building blocks of nucleic acids.
		Result: Each nucleotide consists of a nitrogenous base, a pentose sugar, and a phosphate group.
## OPTION ANALYSIS
[A] ✓: I. Reddish-brown - Correct color change observed when glycogen reacts with iodine. II. Highly repetitive DNA sequence - Accurate description of satellite DNA. III. Nitrogenous base, pentose sugar, phosphate group - Correct components of a nucleotide.
[B] :x: I. Blue-black - This is the color iodine gives with starch, not glycogen. II. Non-repetitive DNA sequence - Incorrect; satellite DNA is highly repetitive. III. Amino acid, hexose sugar, phosphate group - Incorrect components; amino acids are not part of nucleotides, and nucleotides contain pentose sugar, not hexose.
[C] :x: I. Violet - Incorrect color for glycogen-iodine reaction. II. Moderately repetitive DNA sequence - While some satellite DNA can be moderately repetitive, 'highly repetitive' is a more accurate description. III. Nitrogenous base, pentose sugar, sulfate group - Incorrect; nucleotides contain a phosphate group, not a sulfate group.
[D] :x: I. Green - Incorrect color for glycogen-iodine reaction. II. Unique DNA sequence - Incorrect; satellite DNA is repetitive. III. Amino acid, deoxyribose sugar, phosphate group - Incorrect; amino acids are not part of nucleotides, and while deoxyribose is a pentose sugar found in DNA nucleotides, the overall combination with amino acids is incorrect.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the iodine test for glycogen with that of starch: Remember that glycogen gives a reddish-brown color, while starch gives a blue-black color.
		2. Misunderstanding the nature of satellite DNA: Ensure you understand that it's highly repetitive.
	**Quick Tips**:
		1. Remember the acronym 'NBP' for nucleotide components: Nitrogenous base, Pentose sugar, Phosphate group.
		2. Associate 'satellite' DNA with 'repetitive' sequences.

Mr. NARESH KUMAR K · Answer

The correct Option is "I. Reddish-brown
II. Highly repetitive DNA sequence
III. Nitrogenous base, pentose sugar, phosphate group"

Mr. NARESH KUMAR K · Answer

I. Blue-black
II. Non-repetitive DNA sequence
III. Amino acid, hexose sugar, phosphate group

Mr. NARESH KUMAR K · Answer

I. Violet
II. Moderately repetitive DNA sequence
III. Nitrogenous base, pentose sugar, sulfate group

Mr. NARESH KUMAR K · Answer

I. Green
II. Unique DNA sequence
III. Amino acid, deoxyribose sugar, phosphate group

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