Biomolecules

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What is the role of vitamin K in the body?

Essential for the breakdown of carbohydrates
Essential for synthesis of insulin in the liver
Essential for synthesis of prothrombin in the liver (correct)
Essential for the breakdown of immune defense system

What is the primary function of Vitamin B in the human body?

Regulating oxidative metabolism
Providing energy for carbohydrate metabolism
Required for amino acid metabolism (correct)
Essential for protein synthesis

What is the characteristic of phospholipids in cell walls?

They are major constituents of cell walls (correct)
They are not found in plant cell walls
They are only found in animal tissues
They are minor constituents of cell walls

Which of the following vitamins is NOT a fat-soluble vitamin?

Vitamin C (D) Signup and view all the answers

What is the relationship between the nucleotide triplet and the amino acids?

Genetic code (D) Signup and view all the answers

What is the primary component of co-enzyme FAD?

Phosphoric acid (C) Signup and view all the answers

What is the function of insulin in the body?

It is a protein hormone (D) Signup and view all the answers

What is the primary function of Vitamin B in preventing diseases?

Preventing Beri-beri (D) Signup and view all the answers

What is the characteristic of monosaccharides?

They differ in configuration at C and C (B) Signup and view all the answers

What is the primary source of Vitamin B?

All of the above (D) Signup and view all the answers

What is the role of Vitamin B in the body?

Important component of Co-A required for oxidative metabolism (D) Signup and view all the answers

What is the deficiency disease of Vitamin B?

Pellagra (B) Signup and view all the answers

Which of the following is a rich source of Vitamin B?

Yeast, liver, kidneys, eggs, meat, milk, sugarcane, groundnut, tomatoes (B) Signup and view all the answers

What is the role of Vitamin H in the body?

Essential for fat synthesis and energy production (A) Signup and view all the answers

What is the deficiency disease of Vitamin H?

Skin lesions, loss of appetite, weakness, hairfall, paralysis (B) Signup and view all the answers

What is the primary function of collagen in the living system?

To hold living systems together (D) Signup and view all the answers

What type of bond is responsible for stabilizing the secondary structure of proteins?

Hydrogen bond (A) Signup and view all the answers

What is the function of haemoglobin in the living system?

To carry ions or molecules from one place to another (C) Signup and view all the answers

What is the characteristic of proteins with an alpha-helix structure?

They are elastic and can be stretched (B) Signup and view all the answers

What is the function of enzymes in the living system?

To catalyze biochemical reactions (A) Signup and view all the answers

What is unique about the structure of silk?

It has a beta-pleated sheet structure (D) Signup and view all the answers

What is a characteristic of globular proteins?

They are tightly folded into a compact spherical form (D) Signup and view all the answers

What is a characteristic of proteins in general?

They are nonvolatile and do not have a sharp melting point (C) Signup and view all the answers

What happens when proteins containing -SH group react with sodium nitroprusside solution?

A violet colour is developed (C) Signup and view all the answers

What is a characteristic of proteins at their isoelectric point?

Their ionization is minimum (C) Signup and view all the answers

What type of proteins have a compact structure with α-helices held together by weak attractive forces?

Globular proteins (D) Signup and view all the answers

What is the type of protein that contains a prosthetic group or cofactor, and yields amino acids and non-protein material on hydrolysis?

Conjugated protein (B) Signup and view all the answers

What is the term for the end of a polypeptide chain that has a free amino group?

N-terminal end (A) Signup and view all the answers

What type of bond holds the polypeptide chains together in fibrous proteins?