Match the following:
Column-$I$Column-$II$
$1$. $97\%$ of $O_2$ is transported$p$. Bicarbonate
$2$. $70\%$ of $CO_2$ is transported$q$. $RBC$
$3$. $100$ $ml$ of oxygenated blood$r$. $4$ $ml$
$4$. $100$ $ml$ of deoxygenated blood$s$. $5$ $ml$

  • A
    $(1-p), (2-q), (3-r), (4-s)$
  • B
    $(1-q), (2-p), (3-s), (4-r)$
  • C
    $(1-r), (2-p), (3-q), (4-s)$
  • D
    $(1-s), (2-q), (3-p), (4-r)$

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Which two of the following changes $((i)$ to $(iv))$ usually occur in plain dwellers when they move to high altitudes ($3500 \ m$ or more)?
$(i)$ Increase in red blood cell size
$(ii)$ Increase in red blood cell production
$(iii)$ Increased breathing rate
$(iv)$ Increase in thrombocyte count

Analogy type question:
$(1)$ Inspiratory Reserve Volume $(IRV)$: $2500$ to $3000 \ mL$ :: Inspiratory Capacity $(IC = TV + IRV)$: ........
$(2)$ $CO_2$ by hemoglobin: Carbamino-hemoglobin form :: Oxygen binds with hemoglobin: ........

Match the partial pressure of carbon dioxide in different parts involved in diffusion in comparison to the atmosphere.
Column-$I$Column-$II$ ($mm\, Hg$ pressure)
$P$. Atmospheric air$I$. $40$
$Q$. Tissues$II$. $45$
$R$. Oxygenated blood$III$. $0.3$

Which of the following plants is able to show rolling of leaf during the middle of the day?

Which of the following statement$(s)$ is/are correct?
$(a)$ High concentration of carbonic anhydrase in RBCs.
$(b)$ High concentration of carbonic anhydrase in blood plasma.
$(c)$ Every $100 \ ml$ of deoxygenated blood delivers approximately $4 \ ml$ of $CO_2$ to the alveoli.
$(d)$ $20-25\%$ of $CO_2$ is carried by hemoglobin as oxyhemoglobin.

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