Tertiary Structure of Protein

Q.

What is meant by the secondary structure of proteins?

Q.

Write a short note on the denaturing and folding of proteins.

Q. The structure of the protein which gives a functional and the complete three-dimensional view is

1. primary structure
2. $\alpha$-helix
3. $\beta$- pleated sheet
4. tertiary structure

Q.

Why are Beta Sheets Important?

Q.

Hollow woolen ball is _________ structure of protein

1. Primary

2. Secondary

3. Tertiary

4. Quaternary

Q.

Egg albumen is an example of

1. Simple protein

2. Steroid

3. Conjugated protein

4. Derived protein

Q.

What is meant by the tertiary structure of proteins?

Q.

What stabilizes quaternary structure?

Q. Which among the following are least likely to be involved in stabilizing the tertiary structure of proteins?

1. Hydrophobic interaction
2. Electrostatic interactions
3. Ester bonds
4. Hydrogen bonds

Q. Which of these is responsible for the functioning of a protein?

1. amino acid sequence
2. primary structure
3. secondary structure
4. tertiary structure

Q. Which of the following is the least likely to be involved in stabilizing the three dimensional folding of most proteins?

1. Hydrophobic interaction
2. Ester bonds
3. Hydrogen bonds
4. Electrostatic interaction

Q. Match the following conformations of proteins with their specific types of bonds that stabilises them.

1. H-bonds
2. Peptide bonds
3. Disulfide bonds

Q.

The primary structure of a protein is due to

1. $-\mathrm{S}-\mathrm{S}-$ linkages

2. Hydrogen bonds

3. Ionic bonds

4. Peptide bonds

Q.

mention a protein having quaternary structure.also, name its poplypeptide chain

Q. Which of the following is the biologically active form(s) of a protein?

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

Q.

Contractile proteins are found in the_____.

Q. For a protein to have a quaternary structure, it must

1. Consist of two or more polypeptide subunits
2. Consist of four polypeptide subunits
3. Have four domains
4. Exist in several alternative conformational states

Q. The structure of the protein which gives a functional and the complete three-dimensional view is

1. primary structure
2. $\alpha$-helix
3. $\beta$- pleated sheet
4. tertiary structure

Q.

Match the biological molecules listed under column I with their biological functions listed under column II. Choose the answer which gives the correct combinations from the two columns.
$\begin{array}{cc}ColumnI& ColumnII\\ \left(BiologicalMolecule\right)& \left(Function\right)\\ A.Glycogen& 1.Hormone\\ B.Globulin& 2.Biocatalyst\\ C.Steroid& 3.Antibody\\ D.Thrombin& 4.Storageproduct\end{array}$

1. $\begin{array}{ccccc}& A& B& C& D\\ & 3& 2& 4& 1\end{array}$

2. $\begin{array}{ccccc}& A& B& C& D\\ & 2& 4& 3& 1\end{array}$

3. $\begin{array}{ccccc}& A& B& C& D\\ & 4& 3& 1& 2\end{array}$

4. $\begin{array}{ccccc}& A& B& C& D\\ & 4& 2& 1& 3\end{array}$

Q. What holds a protein to its tertiary structure?

1. Glucose + Fructose
2. Glucose + Glucose
3. Glucose + Galactose
4. Glucose + Maltose

Q. Which is least likely to be involved in stabilising the three dimensional folding of most proteins

1. Ester bonds
2. Hydrogen bonds
3. Electrostatic interactions
4. Hydrophobic interactions.

Q. Write a note on the types and structure of proteins.

Q. Cellulose is a protein.

1. True
2. False

Q. Which of the following statement is appropriate with respect to the quarternary structure of protein?

1. Consists of four subunits
2. May be either $\alpha$ or $\beta$
3. Is unrelated to two function of the protein
4. Is dictated by the primary structures of the individual subunits

Q. Assertion :The long protein chain is folded upon itself like a hollow ball giving rise to the tertiary structure. Reason: Tertiary structure gives a 3-dimensional view of a protein.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Which of these is responsible for the functioning of a protein?

1. amino acid sequence
2. primary structure
3. secondary structure
4. tertiary structure

Q. Alpha helixes and beta sheets are the examples of ................... protein organisation.

1. Primary structure
2. Secondary structure
3. Tertiary structure
4. Quaternary structure

Q. Which structure of protein is biologically most active?

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

Q. Choose the correct combination of statements given below related to the cysteine residue in proteins.
i) Cysteine can be linked to tyrosine by $S-O$ bond.
ii) Cysteine can be linked to another cysteine by $S-S$ bond.
iii) Cysteine can complex with $Z{n}^{2+}$.
iv) Cysteine can be linked to methionine by $S-S$ bond.

1. ii) and iii)
2. i) and ii)
3. iii) and iv)
4. i) and iv)

Q. Differentiate between the tertiary and Quaternary structure of a protein