Denaturation of a Protein

Q. Restriction enzymes belong to a larger class of the enzymes called

1. Chitinase
2. Cellulase
3. Nuclease
4. Polymerase

Q. Which is not involved in protein synthesis?

1. 
   Termination
2. 
   Initiation
3. 
   Transcription
4. 
   Elongation

Q.

What happens during the assimilation of protein into a man?

Q.

Lysosome is also called ______________.

Q. Denaturation of proteins can occur by the activity of

1. high temperature
2. water at room temperature
3. salts of heavy metals
4. both (b) and (c)

Q.

What is the first product of protein catabolism?

Q.

Which of the following is a simple protein?

1. Protamine

2. Peptone

3. Lipoprotein

4. Phosphoprotein

Q. Application of heat causes _____ of proteins.

1. Thermodynamics

2. Stoichiometry

3. Thermometry

4. Thermal Denaturation

Q.

Name the following:

A macromolecule is formed by the linkage of thousands of amino acids.

Q. Nucleic acid is fragmented by enzyme

1. polymerases
2. ligases
3. nucleases
4. proteases

Q.

Write a brief remark on protein main structure.

Q.

Lysosomes keep the cells clean by digesting foreign materials.

1. True
2. False

Q. a) What is denaturation of proteins?
b) What are essential Amino Acids? Give one example.

Q. What is function and work of gastroesophageal sphincter??

Q. Explain denaturation of proteins.

Q. Differentiate between denaturation and renaturation of proteins.

Q. During denaturation of proteins, only .......... structure of protein is retained

Q. Which of the statements about 'Denaturation' given below are correct?
Statements:
(i) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
(ii) Denaturation leads to the conversion of double strand of DNA into single strand.
(iii) Denaturation affects primary structure which gets destroyed.

1. (i) and (ii)
2. (i), (ii) and (iii)
3. (ii) and (iii)
4. (i) and (iii)

Q. Application of heat causes _____ of proteins.

1. Thermometry
2. Stoichiometry
3. Thermal Denaturation
4. Thermodynamics

Q. What do you understand by denaturation of Protein?

Q. The proteolytic enzyme rennin is found in:

1. Pancreatic juice
2. Gastric juice
3. Bile juice
4. Intestinal juice

Q. The structure of a protein can be denatured by heat.

1. True
2. False

Q. Read the given paragraph and write answers of the following questions.
Protein is very essential for the growth, development and maintenance of living systems. Proteins are natural polymer of $\alpha -$amino acids. A definite sequence of amino acids form a specific protein. Two or more than two amino acids bind to give peptide bond. Proteins are polypeptide, which loses its biological activity by physical or chemical changes.
(A) Explain essential and non-essential amino acid with example.
(B) Explain denaturation of protein.

Q. How can billions of proteins form from just twenty amino acids as the building blocks?

Q. Application of heat causes _____ of proteins.

1. Thermometry
2. Stoichiometry
3. Thermal Denaturation
4. Thermodynamics

Q. Identify the correct statement with reference to human digestive system.

1. IIeum is a highly coiled part
2. Vermiform appendix arises from duodenum
3. Ileum opens into small intestine
4. Serosa is the innermost layer of the alimentary canal

Q. Protein denaturation is caused by disruption of

1. Peptide bonds
2. Three-dimensional configuration
3. Tertiary and secondary structure
4. Both B and C

Q. Which of the following element is used up in phosphorylation ?

1. Magnesium and phosphate
2. Iron and phosphorous
3. Calcium and sulphur
4. Chlorine and manganese

Q. What does a protein lose when it denatures?

1. Its three-dimensional shape
2. Its peptide bonds
3. Its primary structure
4. Its sequence of amino acids