Read the following and answer the question based on it. Proteins are used by the body for energy, metabolism, gene growth and maintenance, 10 to 35 percent of the daily calorie intake should ideally consist of proteins. They are found in all cells of the body. Hair and nail are trade up of a protein called keratin, having sulphur bonds. Curlier hair has more sulphur links. Too much intake of proteins can sometimes lead to body weight Proteiris____
A. Are not used by the body for any of its functions.
B. Are required by the body in adequate quantities.
C. Makes hair shiny, lengthy and black.
D. Do not cause weight gain.

Options

A. A
B. C
C. D
D. B

Answer

To solve the question based on the provided information about proteins, let's analyze the options one by one.

**Step 1: Understand the role of proteins in the body.**
- According to the passage, proteins are essential for energy, metabolism, gene growth, and maintenance. This indicates that proteins are indeed used by the body for various functions.

**Step 2: Evaluate option A.**
- Option A states that proteins "are not used by the body for any of its functions." This contradicts the information given in the passage, which clearly states that proteins are used for energy, metabolism, and other functions. Therefore, option A is incorrect.

**Step 3: Evaluate option B.**
- Option B states that proteins "are required by the body in adequate quantities." The passage mentions that 10 to 35 percent of daily calorie intake should consist of proteins, indicating that they are indeed required in adequate amounts. Thus, option B is correct.

**Step 4: Evaluate option C.**
- Option C claims that proteins "make hair shiny, lengthy, and black." While the passage mentions that hair is made up of keratin (a protein), it does not state that proteins specifically make hair shiny, lengthy, or black. Therefore, option C is not supported by the passage and is incorrect.

**Step 5: Evaluate option D.**
- Option D states that proteins "do not cause weight gain." The passage mentions that too much intake of proteins can lead to body weight gain, which contradicts this statement. Therefore, option D is incorrect.

**Final Conclusion:**
The only correct statement based on the passage is option B: "Are required by the body in adequate quantities."