Total Biomolecules

Peptide bonds in proteins can be broken down by the enzyme peptidase. Adrian orders a hamburger and French fries for lunch. He adds cheese and mayonnaise to his hamburger and then sits down to eat lunch with his friends. Which structure would most likely result from the action of peptidase in Adrian’s stomach?

• Lipids

• Glucose

• Nucleic Acid

• Amino Acid

Assertion (A) - In solutions of different pH, the structure of amino acids changes

Reason (R) - Presence of ionizable nature of –NH2 and –COOH groups in amino acids

• Both (A) and (R) are true and (R) is the correct explanation of (A)

• Both (A) and (R) are true and (R) is not the correct explanation of (A)

• (A) is correct but (R) is incorrect

• (A) is incorrect and (R) is correct

Statement 1 - Arachidonic acid has 20 carbon atoms excluding the carboxyl carbon.

Statement 2 - Neural tissues have lipids with more simpler structures.

• Statement 1 and Statement 2 both are correct

• Statement 1 and Statement 2 both are incorrect

• Statement 1 is correct only

• Statement 2 is correct only

P- At each step of ascent, the strand of DNA turns 360°.

Q- Pitch of DNA is 3.4 nm.

• P and Q both are correct

• Q is correct only

• P is correct only

• P and Q both are incorrect

S 1 - All enzymes are proteins without any exception.

S 2 - Rate of a physical or chemical process refers to the amount of substrate formed per unit time

• S 1 and S2 both are incorrect

• S 1 and S2 both are correct

• S 1 is correct only

• S 2 is correct only

Assertion (A) - The Cellulose -I₂ is blue in colour

Reason(R) - Cellulose does not contain complex helices and hence cannot hold I₂.

• Both (A) and (R) are true and (R) is the correct explanation of (A)

• Both (A) and (R) are true and (R) is not the correct explanation of (A)

• A is correct only

• R is correct only

Amino acids are not-

• Substituted methanes

• organic compounds

• Inorganic compounds

• Structural unit of proteins

identify X and Y in the given protein structure.

• X -N-terminal amino acid,

  Y- C-terminal amino acid

• X -N-terminal amino acid,

  Y- N-terminal amino acid

• X -C-terminal amino acid,

  Y- N-terminal amino acid

• X -C-terminal amino acid,

  Y- C-terminal amino acid

Q. Match the following polymer with its monomer -

p. Cellulose 1. fructose

q. Chitin 2. amino acid

r. Insulin 3. glucose

s. Inulin 4. NAG

• p. 3

  q. 4

  r. 1

  s. 2

• p. 4

  q. 3

  r. 1

  s. 2

• p. 3

  q. 4

  r. 2

  s. 1

• p. 4

  q. 3

  r. 2

  s. 1

Assertion - Amino acids are called alpha amino acids.

Reason -Amino acids contains an amino group and an acidic group as substituents on two different carbon

• Assertion and Reason are correct and Reason is the correct explanation of Assertion

• Assertion and Reason are correct and Reason is not the correct explanation of Assertion

• Both Assertion and Reason are incorrect

• Only one is correct