Question : An enzyme produced by HIV that allows the integration of HIV DNA into the host cell's DNA is:

Option 1: Ligase

Option 2: Integrase

Option 3: Helicase

Option 4: DNA gyrase

Question : Soap bubble attains spherical shape due to _____.

Option 1: inertia

Option 2: pressure

Option 3: surface tension

Option 4: viscosity

Question : Blood does not coagulate inside the body due to the presence of

Option 1: Plasma

Option 2: Haemoglobin

Option 3: Heparin

Option 4: Fibrin

Question : Water flows off the wings of birds and insects due- to the presence of

Option 1: Waxes

Option 2: Sugars

Option 3: Proteins

Option 4: Minerals

Question : Which enzyme digests proteins in the stomach?

Option 1: Trypsin

Option 2: Pepsin

Option 3: Salivary amylase

Option 4: Pancreatic enzyme