MCQ
The breathing centre initiates the ventilation in response to
- AIncrease of air pressure
- BDecrease of air pressure
- ✓Increase of $CO _{2}$ in arterial blood
- DIncrease of $O_{2}$ in arterial blood
$(i)$ High $CO _{2}$ in arterial blood
$(ii)$ Less $pH$ in arterial blood
$(iii)$ High $H^{+i i}$ concentration in arterial blood
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$R$ : It is native configuration of protein molecules maintained by multiple covalent bonds only.
| Chromosomes | Position of centromere |
| $(A)$ Metacentric | $(1)$ At the tip |
| $(B)$ Submetacentric | $(2)$ Almost near the tip |
| $(C)$ Acrocentric | $(3)$ At the middle |
| $(D)$ Telocentric | $(4)$ Slightly away from the middle |
$I.$ Water ...$A\%$ $II.$ Urea ...$B\%$ $III.$ Uric acid ...$C\%$ $IV.$ Salt ...$D\%$
Choose the right options for $A , B , C$ and $D$ from given options