MCQ
Which substances when present in high level can activate the chemosensitive area present adjacent to rhythm centre?
- A$CO_2$ and $O_2$
- B$HCO _{3}^{-}$ions and $O _{2}$
- ✓$CO _{2}$ and $H ^{+}$ions
- D$H ^{+}$and $HCO _{3}^{-}$ions
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$R-$ The proteins would be degraded by proteases and the individual amino acids (after deamination) depending on their structure would enter the pathway at some stage within the Kreb's cycle or even as pyruvate or acetyl $Co\,A. $
$I.$ Pre and postsynaptic membrane neurons are in very close proximity at electric synapse
$II.$ Electric current are involved in the transmission of impulses
$III.$ Transmission of an impulse across electrical synapses is very similar to impulse conduction along a single axon
$IV.$ Impulse transmission is always faster in electric synapse than that across a chemical synapse
$V.$ Electrical synapses are rare in our system
The correct option is
$R-$ Tropomyosin is a rod - shaped fibrous protein. Tropomyosin forms two helical strands, which are wrapped around the $G-$ actin.