MCQ
An aminoacid under certain conditions have both positive and negative charges simultaneously in the same molecule. Such a form of aminoacid is called.
- AAcidic form.
- BBasic form.
- CAromatic form.
- ✓Zwitterionic form.
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$(i)$ is released by sympathetic fibers
$(ii)$ is released by parasympathetic fibers
$(iii)$ increases the heart rate
$(iv)$ decreases blood pressure.
Which of the above statements are correct ?
| Column$-I$ | Column$-II$ |
| $(a). Br$ | $(i)$ Corolla |
| $(b). K$ | $(ii)$ Perianth |
| $(c). C$ | $(iii)$ Calyx |
| $(d). P$ | $(iv)$ Bracteate |
$R$ : Echinoderms have secondarily adapted to radial symmetry.