Pancreas is a mixed gland having both endocrine and exocrine functions. The exocrine portion secretes digestive enzymes into the duodenum via the pancreatic duct. The endocrine portion secretes two hormones, insulin and glucagon, into the blood.

Correct Option: C

Pancreas is a mixed gland having both endocrine and exocrine functions. The exocrine portion secretes digestive enzymes into the duodenum via the pancreatic duct. The endocrine portion secretes two hormones, insulin and glucagon, into the blood.

Red Blood Cells (RBC) take their origin in the bone marrow. The liver also produces RBC, but only during infancy. The average life span of RBC is about 100120 days. The old, worn out and dead RBC are destroyed mainly in an organ called spleen. Hence, bone marrow is commonly called the cradle of RBC' and spleen is commonly called the 'graveyard of RBC'.

Correct Option: B

Red Blood Cells (RBC) take their origin in the bone marrow. The liver also produces RBC, but only during infancy. The average life span of RBC is about 100120 days. The old, worn out and dead RBC are destroyed mainly in an organ called spleen. Hence, bone marrow is commonly called the cradle of RBC' and spleen is commonly called the 'graveyard of RBC'.

If a person belongs to the blood group AB, he has both A and B antigens on the surface of his red blood cells and no A or B antibodies at all in his blood plasma. So he can donate blood to those having AB blood group; but can receive blood from AB, A, B, and O groups.

Correct Option: C

If a person belongs to the blood group AB, he has both A and B antigens on the surface of his red blood cells and no A or B antibodies at all in his blood plasma. So he can donate blood to those having AB blood group; but can receive blood from AB, A, B, and O groups.

Chloro quine prevents the development of malaria parasites in the blood. Doctors use it to both prevent and treat malaria.

Correct Option: C

Chloro quine prevents the development of malaria parasites in the blood. Doctors use it to both prevent and treat malaria.

Mycoplasma refers to a genus of bacteria that lack a cell wall. Several species are pathogenic in humans, including M. pneumoniae, which is an important cause of pneumonia (an inflammatory condition of the lung—affecting primarily the microscopic air sacs known as alveoli) and other respiratory disorders, and M. genitalium, which is believed to be involved in pelvic inflammatory diseases.

Correct Option: A

Mycoplasma refers to a genus of bacteria that lack a cell wall. Several species are pathogenic in humans, including M. pneumoniae, which is an important cause of pneumonia (an inflammatory condition of the lung—affecting primarily the microscopic air sacs known as alveoli) and other respiratory disorders, and M. genitalium, which is believed to be involved in pelvic inflammatory diseases.