Which base is found in RNA but not in DNA? MCQ with Answer and Explanation

Explanation:
The Munch hypothesis, or mass flow hypothesis, explains the translocation of organic solutes (primarily sucrose) through the phloem. It proposes that the movement is driven by a turgor pressure gradient between the source (where sugars are loaded into the phloem, increasing osmotic pressure) and the sink (where sugars are unloaded, decreasing osmotic pressure). Water flows from xylem to phloem and back, driving the bulk flow.

Explanation:
Chlorophyll a is the primary photosynthetic pigment found in all algae and is essential for the light reactions of photosynthesis. Different groups of algae also contain other accessory pigments like chlorophyll b, c, phycobilins (phycocyanin, phycoerythrin), and carotenoids (fucoxanthin), which give them their characteristic colors (green, red, brown) and help in capturing light energy.

Explanation:
Macrophages phagocytose; B cells make antibodies. T cells are part of adaptive immunity, not innate. So 3 is incorrect.