Primary Structure of Protein

Q. In a polysaccharide (like glycogen), the right end and left end are called

1. C terminal and N terminal, respectively
2. reducing end and non reducing end, respectively
3. non reducing end and reducing end, respectively
4. N terminal and C terminal, respectively

Q.

Which of the following statement(s) is false, regarding Proteins ?

I. A protein is a heteropolymer but not a homopolymer.

II. Collagen is the most abundant protein in the animal world.

III. RUBISCO is the most abundant protein in the biosphere.

IV The first amino acid in a polypeptide chain is C- terminal amino acid and the last is N- terminal amino acid.

1. IV

2. I only

3. II only

4. II & III

Q.

Organelle without a cell membrane is :

1. Ribosome

2. Golgi apparatus

3. Chloroplast

4. Nucleus

Q.

Make a brief note about the four levels of protein structure.

Q.

What are structural and functional proteins ?

Q.

A homopolymer has only one type of building block called a monomer repeated n number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers made of amino acids. While nucleic acid-like DNA or RNA is made of only 4 types of nucleotide monomers, proteins are made of how many types of monomers?

Q. Choose the correct option to fill in the blanks: The term Protein is derived from a Greek word called (i)______ which was coined by (ii)______. Every protein has basic units called (iii)_______ and the most abundant protein in the human body is (iv)______.

1. Lipido Bloor Fatty Acids MGDG

2. Nuclein Miescher Nucleotides DNA

3. Proteios Mulder Amino acids Collagen

4. Saccharide Liebig Glucose Cellulose

Q. When we homogenise any tissue in an acid, the acid soluble pool represents

1. Nucleus
2. Cytoplasm
3. Mitochondria
4. Cell membrane

Q.

The primary structure of a protein is due to

1. Hydrogen bonds

2. Peptide bonds

3. –S-S- linkages

4. Ionic bonds

Q.

Schematically represent primary, secondary and tertiary structures of a hypothetical polymer say for example a protein.

Q.

Why are antiparallel beta-sheets more stable?

Q.

Differentiate between Lysosome and Ribosome.

Q.

Proteins have a primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?

Q. A linear arrangement of amino acids linked by peptide bonds, forms the _____ structure of protein.

1. Secondary

2. Tertiary

3. Quaternary

4. Primary

Q.

Skin, hair and nails are ________________ .

Q. Study the image given below and select the correct statement.

1. The left end of the chain is C-terminal
2. The protein contains 15 amino acids
3. The right end of the chain is N-terminal
4. The left end of the chain is N-terminal

Q.

Which of the following statement(s) is false, regarding Proteins ?

I. A protein is a heteropolymer but not a homopolymer.

II. Collagen is the most abundant protein in the animal world.

III. RUBISCO is the most abundant protein in the biosphere.

IV The first amino acid in a polypeptide chain is C- terminal amino acid and the last is N- terminal amino acid.

1. I only

2. II only

3. $ll\&lll$

4. IV

Q.

Which one of the following is linked in long chains to form proteins?

1. Sugars

2. Amino acids

3. Nucleosides

4. Nucleotides

Q.

Define the following as related to proteins:

Primary structure

Q. Which of the following is not a conjugated protein?

1. Peptone
2. Phosphoprotein
3. Lipoprotein
4. Chromoprotein

Q. Which of the following is not a function of cytoskeleton in a cell?

1. Support of the organelle
2. Maintenance of cell shape and structure
3. Cell motility
4. Intracellular transport

Q. The number of peptide bonds present in a polypeptide of 25 amino acids will be

Q.

Plant cells do not show endocytosis because

1. They have a rigid cell wall and internal turgor pressure

2. They have a large vacuole

3. They have a nucleus which is pushed to one side

4. They show plasmolysis

Q.

Write a brief remark on protein ternary structure.

Q. Which structure level enables proteins to function as enzymes?

1. Primary
2. Secondary
3. Tertiary
4. Quarternary

Q. During denaturation of proteins, which of the following structures is not denatured?

1. Primary
2. Secondary
3. Tertiary
4. Quartenary

Q. Arachidonic acid and palmitic acids have how many carbons in each of them.

1. 20, 16
2. 16, 16
3. 16, 20
4. 18, 16

Q.

Proteins have primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?

Q. What is Secondary structure of protein?