The functional group which is found in amino acid is- (a)-COOH (b) -\(NH_2\) (c) -\(CH_3\) (d) both (a) and (b)

Which base is present in RNA but not in DNA? (a) Uracil (b) Cytosine (c) Guanine (d) Thymine

The anomeric carbon in D(+) glucose is – (a) C-1 carbon (b) C-2 carbon (c) C-5 carbon (d) C-6 carbon

Each polypeptide in protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be- (a) primary structure of proteins. (b) secondary structure of proteins. (c) tertiary structure of proteins. (d) quaternary structure of proteins.

Which statement is incorrect about peptide bond? (a) C-N bond length in proteins is longer than usual bond length of C-N bond. (b) Spectroscopic analysis shows planar structure of -CO-NH- group (c) C-N bond length in proteins is smaller than usual bond length of C-N bond (d) None of the above

The reason for double helical structure of DNA is operation of- (a) electrostatic attractions (b) dipole-dipole interaction (c) van der Waal’s forces (d) hydrogen bonding

Which of the following factors is not responsible for the denaturation of proteins? (a) Heat (b) Charge (c) pH change (d) Organic solvents

Fructose contains functional group- (a) Aldehyde (b) Ketone (c) Carboxylic acid (d) primary amine

The letter ‘D’ in carbohydrates signifies- (a) dextrorotatory (b) configuration (c) diamagnetic nature (d) mode of synthesis

RNA and DNA are chiral molecules. Their chirality is due to : (a) Chiral bases (b) Chiral phosphate ester units (c) D-sugar component (d) L-sugar component.

Assertion: D (+) -Glucose is dextrorotatory in nature. Reason: D represents its dextrorotary nature. A. Assertion and reason both are correct statements and reason is correct explanation for assertion. B. Assertion and reason both are correct statements but reason is not correct explanation for assertion. C. Assertion is correct statement but reason is wrong statement. D. Assertion is wrong statement but reason is correct statement.

Assertion: The bond between adenine and thymine is stronger than the bond between Cytocine and guanine. Reason: Cytosine and guanine have a triple hydrogen bond while adenine and thymine have a double hydrogen bond A. Assertion and reason both are correct statements and reason is correct explanation for assertion. B. Assertion and reason both are correct statements but reason is not correct explanation for assertion. C. Assertion is correct statement but reason is wrong statement. D. Assertion is wrong statement but reason is correct statement.

Assertion: Glycine must be taken through diet. Reason: It is essential amino acid. A. Assertion and reason both are correct statements and reason is correct explanation for assertion. B. Assertion and reason both are correct statements but reason is not correct explanation for assertion. C. Assertion is correct statement but reason is wrong statement. D. Assertion is wrong statement but reason is correct statement.

Assertion: The two strands of DNA are complementary to each other. Reason: The hydrogen bonds are formed between specific pairs of bases. A. Assertion and reason both are correct statements and reason is correct explanation for assertion. B. Assertion and reason both are correct statements but reason is not correct explanation for assertion. C. Assertion is correct statement but reason is wrong statement. D. Assertion is wrong statement but reason is correct statement.

Assertion: Amino acids in protein remain intact even when it is denatured. Reason: The primary structure of protein is broken to give individual aminoacids on denaturation. A. Assertion and reason both are correct statements and reason is correct explanation for assertion. B. Assertion and reason both are correct statements but reason is not correct explanation for assertion. C. Assertion is correct statement but reason is wrong statement. D. Assertion is wrong statement but reason is correct statement.