MCQ
Final electron acceptor in oxidative phosphorylation is:
- ✓Oxygen.
- BHydrogen.
- CCytochrome.
- DNone of these.
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| Column$-I$ | Column$-II$ |
| $a.$ Capillaries | $(i)$ Valves |
| $b.$ Veins | $(ii)$ Smooth muscles |
| $c.$ Aorta | $(iii)$ Narrowest blood vessels |
| $d.$ Tunica media | $(iv)$ Elastic artery |
Select the alternative which shows the correct matching.
$(a)$ secretion of secondary metabolities and their deposition in the lumen of vessels.
$(b)$ deposition of organic compounds like tannins and resins in the central layers of stem.
$(c)$ deposition of suberin and aromatic substances in the outer layer of stem.
$(d)$ deposition of tannins, gum, resin and aromatic substances in the peripheral layers of stem.
$(e)$ presence of parenchyma cells, functionally active xylem elements and essential oils.
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