1. Fill in the blanks :- (a) is the first stable compound of the dark reaction. (b) The respiratory organ of cockroach is (c) The major enzyme for digestion of proteins present in the stomach is (d) Blood group AB has no in plasma. (e) Source of nicotine is of tobacco.
Answers
Answer:
A. 3-phosphoglyceric acid
B.Trachea
C.Pepsin
D.The ABO system
E.Nicotine
Explanation:
A.In C3 plants, the first stable product formed during dark reaction is 3-phosphoglyceric acid. Since, it is a 3-carbon compound hence, the pathway is referred as C3 pathway. Oxaloacetic acid (OAA) is the first stable compound in C4 plants.
B . Cockroaches can hold their breath for up to seven minutes. Their respiratory system is highly efficient but there are no lungs. Instead, the insects draw in air through external valves called spiracles and transport the air directly to the cells via tubes called trachea.
C.Pepsin is a stomach enzyme that serves to digest proteins found in ingested food. Gastric chief cells secrete pepsin as an inactive zymogen called pepsinogen.
D.blood group O – has no antigens, but both anti-A and anti-B antibodies in the plasma. blood group AB – has both A and B antigens, but no antibodies.
E.Nicotine is derived from the tobacco plant. The primary products that contain nicotine are tobacco-containing products such as cigarettes, cigars, pipe tobacco, and chewing tobacco. There are some nicotine containing smoking cessation products such as patches and gums.
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