Biology
Assertion Thrombin is the inactive form of prothrombin which is produced during blood coagulation.
Reason Vitamin K, a fat-soluble vitamin, is essential for the production of prothrombin.
- Both A and R are True
- Both A and R are False
- A is True and R is False
- A is False and R is True
Related Questions
Assertion. The respiratory pigment haemoglobin (Hb) is formed of RBCs and albumin.
Reason. Haemoglobin contains an iron-containing part called haemin. It is richly found in erythrocytes.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Lymphocytes produce antibodies and are the smallest of WBCs with a single large nucleus.
Reason. Lymphocytes contain granules in the cytoplasm. Lymphocytes release histamine.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Blood group 'AB' does not contain any antibody but contains both the antigens 'A' and 'B'.
Reason. In humans, WBCs have specific proteins on their surfaces. These proteins are called antibodies.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Kidneys eliminate urea and water only during excretion.
Reason. Urea is the most poisonous, nitrogenous waste of the body, so it must be excreted out as early as possible.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.