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How many of the following statements are...

How many of the following statements are correct
(I) polysaccharides are present in an acid insoluble pool.
(II) protein is a homopolymer.
(III) In a Polynucleotide chain, the last amino acid called the N-terminal amino acid.
(IV) The tertiary structure is absolutely necessary for the many biological activities of Proteins.

A

4

B

3

C

2

D

1

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many of the given statements are correct, let's analyze each statement one by one: ### Step 1: Analyze Statement I **Statement I:** Polysaccharides are present in an acid insoluble pool. - **Analysis:** Polysaccharides are large macromolecules with a molecular weight greater than 800 Daltons. They are indeed part of the acid insoluble pool because they do not dissolve in acid due to their size and structure. - **Conclusion:** This statement is **correct**. ### Step 2: Analyze Statement II **Statement II:** Protein is a homopolymer. - **Analysis:** Proteins are composed of 20 different amino acids, which means they are made up of different types of monomers. Therefore, proteins are classified as heteropolymers, not homopolymers. - **Conclusion:** This statement is **incorrect**. ### Step 3: Analyze Statement III **Statement III:** In a polynucleotide chain, the last amino acid is called the N-terminal amino acid. - **Analysis:** This statement is misleading. A polynucleotide chain refers to nucleic acids (DNA/RNA), which are made up of nucleotides, not amino acids. The term "N-terminal" is used for polypeptides (chains of amino acids), not polynucleotides. Therefore, this statement is incorrect. - **Conclusion:** This statement is **incorrect**. ### Step 4: Analyze Statement IV **Statement IV:** The tertiary structure is absolutely necessary for the many biological activities of proteins. - **Analysis:** The tertiary structure of proteins is crucial for their function. It determines the protein's shape and, consequently, its activity. Changes in the tertiary structure can lead to loss of function. Thus, this statement is accurate. - **Conclusion:** This statement is **correct**. ### Final Conclusion Now, let's summarize the correctness of each statement: - Statement I: Correct - Statement II: Incorrect - Statement III: Incorrect - Statement IV: Correct Thus, out of the four statements, **two statements are correct**. ### Answer: 2 statements are correct. ---
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