The hormone that stimulates the secretion of gastric acid is:
A. CCK
B. Gastrin
C. Secretin
D. GIP
Answer: Option B
Solution (By JKExamLibrary)
Gastrin, released by G cells in the stomach antrum, stimulates parietal cells to secrete HCl. Secretin stimulates bicarbonate, CCK stimulates enzyme secretion and gallbladder contraction, GIP inhibits gastric secretion.
Explanation:
Phycoerythrin is a red pigment found in red algae (Rhodophyta), masking the green chlorophyll. Fucoxanthin is brown (brown algae), chlorophyll is green, carotene is orange/yellow. Phycoerythrin absorbs blue light, allowing red algae to live in deeper waters.
Explanation:
Mitochondria are double-membrane organelles with circular DNA (like prokaryotes) and 70S ribosomes, supporting the endosymbiotic origin. They are absent in prokaryotes. They are the site of aerobic respiration. The matrix contains enzymes for Krebs cycle. The inner membrane forms cristae, housing electron transport chain and ATP synthase.
Explanation:
The term 'biology' was independently coined by Jean-Baptiste Lamarck (France) and Gottfried Reinhold Treviranus (Germany) around 1802. Aristotle is father of biology, Linnaeus taxonomy, Darwin evolution.
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