Problem 54
An \(\alpha\) helix is the example of which type of protein structure? (a) Primary (b) Secondary (c) Tertiary (d) Quaternary
Problem 58
Read the given statement and select the option thatcon:d identifies \(X\) and \(Y\). In a glycogen molecule, successive glucose units are pre together by \(\mathrm{X}\) and branches are linked together by \(\mathrm{Y}\). \(X\) (a) \(1,4-\alpha\)-glycosidic bonds 1, \(4-\alpha\)-glycosidic at (b) \(1,4-\alpha\)-glycosidic bonds 1, \(6-\alpha-\) glycosidic bet 'c) \(1,6-\alpha\)-glycosidic acids 1, \(4-\alpha\)-glycosidic art d) \(1,6-\alpha\)-glycosidic acids 1, \(6-\alpha\)-glycosidic at
Problem 63
Refer the two reactions (i) and (ii) given below and select the correct option. (i) \(A D P+P i \rightarrow\) ATP (i) \(A T P \rightarrow A D P+P i\) (i) (ii) (a) Endergonic Exergonic (b) Exergonic Endergonic (1) Endergonic Endergonic (d) Exergonic Exergonic
Problem 65
ueptidoglycan. Pead the given statements. (i) Fructose is the sweetest sugar. (i) Glycine is the simplest amino acid. (iii) Lactose is a disaccharide composed of one molecule each of glucose and galactose. (iv) Cellulose is an unbranched chain of glucose molecules linked by \(\beta-1,4\)-glycosidic bond, Which of the given statements are correct? (a) (i) and (ii) (b) (iii) and (iv) (c) (i), (ii) and (iii) (d) (i), (ii), (iii) and (iv)
Problem 66
A \(\beta\)-pleated sheet organization in a polypeptide chain is an example of (a) \(1^{\circ}\) structure (b) \(2^{\circ}\) structure (c) \(3^{\circ}\) structure (d) \(4^{\circ}\) structure.
Problem 67
Keratin present in hair shows secondary structure known as (a) parallel \(\beta\)-sheet (b) antiparallel \(\beta\)-sheet (c) \(\alpha\)-helix (d) none of these.
Problem 68
The regulation by an organism of chemical composition of its blood and body fluids and other aspects of its internal environment so that physiological processes can proceed at optimum rates is called (a) metabolism (b) enthalpy (c) entropy (d) homeostasis.
Problem 69
Refer the given reaction. \(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}+\mathrm{H}_{2} \mathrm{O} \stackrel{\text { Enzyme A }}{\longrightarrow} 2 \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\) Maltose \(\quad\) Glucose Enzyme A used in the reaction, belongs to which class of enzymes? (a) Dehydrogenases (b) Transferases (c) Hydrolases (d) Lyases
Problem 72
Enzymes that catalyse removal of groups from substrates by mechanisms other than hydrolysis, and addition of groups to double bonds, are called (a) ligases (b) lyases (c) hydrolases (d) dehydrogenases.
Problem 73
Read the given statements and select the correct option. Statement 1:Ribozymes are RNA moleculeswhich catalyze the synthesis of certain specific RNAs and removal of introns from mRNA. Statement 2: Ribozymes are proteinaceous engymes. (a) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1 . (b) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1 . (c) Statement 1 is corret and statement 2 is incorrect. (d) Both statements 1 and 2 are incorrect.
