The enzyme that cuts DNA at specific sequences is: MCQ with Answer and Explanation

Explanation:
Joseph Priestley discovered oxygen, Lavoisier named it and explained combustion and respiration, Ingenhousz showed plants produce oxygen in light. Together, their work elucidated the oxygen cycle. So all contributed.

Explanation:
Photoperiodism is the response of plants to the relative lengths of day and night, influencing flowering. Short-day plants (e.g., poinsettia) flower when day length is less than a critical period; long-day plants (e.g., spinach) flower when days are longer. Phototropism is growth towards light, geotropism to gravity, chemotropism to chemicals.

Explanation:
Insulin acts primarily on liver, muscle, and adipose tissue. The liver is a key target where insulin promotes glycogenesis (glucose to glycogen), glycolysis, and lipogenesis, and inhibits gluconeogenesis, lowering blood glucose. Muscle and adipose tissue also respond. Brain takes up glucose independently of insulin via GLUT1 transporters. Thus liver is a principal target.