Hydrogen Bond

Q.

Select the correct adverb. He usually cuts my hair ___.

Q. The types of bonds present in $CuS{O}_4.5H_{2}O$ are

1. Electrovalent

2. Covalent , co - ordinate covalent

3. Electrovalent, covalent

4. Electrovalent, covalent, dative and hydrogen bond

Q. Hair straighteners use heated plates to temporarily straighten, flatten hair. This is because they:

1. Denature proteins by changing the pH
2. Denature proteins by disrupting hydrogen bonds and disulphide bonds
3. Disrupt the amino acid sequence of hair protein
4. Convert globular protein into fibrous proteins

Q. Protein structure is stabilized by different types of bonds.
Which of these best describes the types of bonds that stablize each level of protein structure?

1. Primary-peptide bonds, Secondary-hydrogen bonds, Tertiary-disulfide bridges, Van der Waals interactions and ionic bonds.
2. Primary-hydrogen bonds, Secondary-covalent bonds, Tertiary-ionic bonds.
3. Primary-covalent bonds, Secondary-disulfide bridges, Tertiary-hydrogen bonds.
4. Primary-hydrogen bonds, Secondary-peptide bonds, Tertiary-disulfide bridges, Van der Waals interactions and ionic bonds.
5. Primary-peptide bonds, Secondary-covalent bonds. Tertiary-Van der Waals interactions and ionic bonds.

Q.

Why some human hair are golden or brown?

Q. Hair straighteners use heated plates to temporarily straighten, flatten hair. This is because they:

1. Denature proteins by changing the pH
2. Convert globular protein into fibrous proteins
3. Denature proteins by disrupting hydrogen bonds and disulphide bonds
4. Disrupt the amino acid sequence of hair protein

Q. Hair straighteners use heated plates to temporarily straighten, flatten hair. This is because they:

1. Denature proteins by changing the pH
2. Denature proteins by disrupting hydrogen bonds and disulphide bonds
3. Disrupt the amino acid sequence of hair protein
4. Convert globular protein into fibrous proteins

Q. The types of bonds present in $CuS{O}_4.5H_{2}O$ are

1. Electrovalent, covalent

2. Covalent , co - ordinate covalent

3. Electrovalent, covalent, dative and hydrogen bond

4. Electrovalent

Q. Which of the following bonds are mainly required for secondary structure of proteins?

1. H- bonds
2. Covalent bonds
3. Electrostatic bonds
4. All of the above

Q. The types of bonds present in $CuS{O}_4.5H_{2}O$ are

1. Electrovalent, covalent

2. Covalent , co - ordinate covalent

3. Electrovalent, covalent, dative and hydrogen bond

4. Electrovalent

Q. The type of bond which can be seen during adsorption is known as

1. Ionic interaction
2. Hydrogen bonds
3. All of the above
4. Van der Waal forces

Q. Which of the following scientists discovered the triple helical structure of collagen?

1. G.N. Ramachandran
2. Anton von Leeuwenhoek
3. Mathias Schleiden
4. Theoder Schwann
5. Rudolf Virchow

Q. Biological molecules are primarily joined by

1. Peptide bonds
2. Ionic bonds
3. Hydrogen bonds
4. Covalent bonds

Q. Hair straighteners use heated plates to temporarily straighten, flatten hair. This is because they:

1. Denature proteins by changing the pH
2. Denature proteins by disrupting hydrogen bonds and disulphide bonds
3. Disrupt the amino acid sequence of hair protein
4. Convert globular protein into fibrous proteins