Trypsin is an enzyme. The pancreas adds a collection of protein-cutting enzymes, with trypsin playing the central role, that chop the protein chains into pieces just a few amino acids long. Then, enzymes on the surfaces of intestinal cells and inside the cells chop them into amino acids, ready for use throughout the body. Trypsin uses a special serine amino acid in its protein-cutting reaction, and is consequently known as a serine protease.

Correct Option: C

Trypsin is an enzyme. The pancreas adds a collection of protein-cutting enzymes, with trypsin playing the central role, that chop the protein chains into pieces just a few amino acids long. Then, enzymes on the surfaces of intestinal cells and inside the cells chop them into amino acids, ready for use throughout the body. Trypsin uses a special serine amino acid in its protein-cutting reaction, and is consequently known as a serine protease.

Lobsters belong to class Crustacea of phylum Arthropoda. Phylum Arthropoda is the largest phylum.

Correct Option: B

Lobsters belong to class Crustacea of phylum Arthropoda. Phylum Arthropoda is the largest phylum.

In women luteinizing hormone stimulates the last stage of oogenesis, ovulation, development of corpus luteum and secretion of progesterone by the corpus luteum. Ovulation is controlled by the increased level of LH in the blood.

Correct Option: A

In women luteinizing hormone stimulates the last stage of oogenesis, ovulation, development of corpus luteum and secretion of progesterone by the corpus luteum. Ovulation is controlled by the increased level of LH in the blood.

Excretion are the removal of waste products of metabolism from body. The excretory organs in cockroach and other insects are Malpighian tubules. Likwise in man, kidney is a part of excretory system. Excretory system consists of a pair of kidney, a pair of ureter, a urinary bladder and a urethra.

Correct Option: B

Excretion are the removal of waste products of metabolism from body. The excretory organs in cockroach and other insects are Malpighian tubules. Likwise in man, kidney is a part of excretory system. Excretory system consists of a pair of kidney, a pair of ureter, a urinary bladder and a urethra.

Human ribcage consists of 12 pairs of ribs. The upper seven pairs of ribs are attached infront directly to the sternum by hyaline cartilage. These are called true ribs. The next three pairs of ribs attach indirectly to sternum. They are termed false ribs. The ribs protect the heart, large blood vessels and lungs. They bear respiratory muscle.

Correct Option: A

Human ribcage consists of 12 pairs of ribs. The upper seven pairs of ribs are attached infront directly to the sternum by hyaline cartilage. These are called true ribs. The next three pairs of ribs attach indirectly to sternum. They are termed false ribs. The ribs protect the heart, large blood vessels and lungs. They bear respiratory muscle.