19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which one of the following statements is true for protein synthesis (translation) ?
The pair in which both species have iron is
Which statement is incorrect about peptide bond?
Which functional group participates in disulphide bond formation in proteins ?
During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process are respectively
The human body does not produce
Which one of the following vitamins is water soluble?
The cell membranes are mainly composed of
Which one of the following is a peptide hormone ?
The hormone which controls the processes like burning of fats, proteins and carbohydrates to liberate energy in the body is
Assertion: Sucrose is a non-reducing sugar. Reason: It has glycosidic linkage.
Assertion: Maltose is a reducing sugar which gives two moles of D-glucose on hydrolysis. Reason: Maltose has a 1,4’- -glycosidic linkage.
Assertion: Hydrolysis of sucrose is known as inversion of cane sugar. Reason: Sucrose is a disaccharide.
Assertion: Glucose does not give 2, 4- DNP test. Reason: Glucose exists in cyclic hemiacetal form.
Assertion: In sucrose two sugar units are joined by 1, 2-glycosidic bond Reason: It joins C1 of -glucose and C2 of -fructose by glycosidic bond.
Assertion (A) Glucose gives reddish brown precipitate with Fehling solution. Reason (R) Reaction of glucose with Fehling solution gives CuO and gluconic acid.
Assertion (A) Deoxyribose, C5H10O4 is not a carbohydrate. Reason: (R) Carbohydrates are hydrates of carbon so compounds which follow Cx(H2O)y formula are carbohydrates.
Assertion: Proteins on hydrolysis produce amino acids. Reason: Amino acids contain –NH2 and –COOH groups.
Assertion: Alpha -amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity. Reason: H ion given by carboxylic group (– COOH) is captured by amino group (–NH2) havin…
Assertion: DNA molecules and all RNA molecules are found in the nucleus of a cell. Reason: On heating, the enzymes do not lose their specific activity.
Assertion: Activity of an enzyme is pH-dependent. Reason: Change in pH affects the solubility of the enzyme in water.
The pair in which both species have iron is
Which one of the following statements is true for protein synthesis (translation) ?
Methyl –D-glucoside and methyl –D- glucoside are
The beta and alpha glucose have different specific rotations. When either is dissolved in water, their rotation changes until the same fixed value results. This is called.