How many polypeptide chains are there in 1 Hb molecule-A- 2 alpha - 2 betaB- 4 alphaC- 4 betaD- 1 alpha - 3 beta

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Standard XII

Biology

Quaternary Structure of Protein

How many poly...

Question

How many polypeptide chains are there in 1 Hb molecule?

2 alpha & 2 beta

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4 alpha

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4 beta

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1 alpha & 3 beta

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Solution

The correct option is A 2 alpha & 2 beta
The hemoglobin molecule is made up of four polypeptide chains: two alpha chains of 141 amino acid residues each and two beta chains of 146 amino acid residues each.

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a x^{2} + b x + c = 0; a, b, c \in I^{+}

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Δ = ∣ ∣ ∣ ∣ ∣ \begin{matrix} 3 & 1 + α + β & 1 + α^{2} + β^{2} 1 + α + β & 1 + α^{2} + β^{2} & 1 + α^{3} + β^{3} 1 + α^{2} + β^{2} & 1 + α^{3} + β^{3} & 1 + α^{4} + β^{4} \end{matrix} ∣ ∣ ∣ ∣ ∣

, then

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Q. If

α, β

are the roots of the equation

a x^{2} + b x + c

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(1)

\frac{1}{α^{2}} + \frac{1}{β^{2}}

(2)

α^{4} β^{7} + α^{7} β^{4}

(3)

{(\frac{α}{β} - \frac{β}{α})}^{2}

Q. If

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2 x^{2} - 3 x - 1 = 0

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α^{2} + β^{2}

(ii)

\frac{α}{β} + \frac{β}{α}

(iii)

α - β

α > β

(iv)

(\frac{α^{2}}{β} + \frac{β^{2}}{α})

(v)

(α + \frac{1}{β}) (\frac{1}{α} + β)

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Q. If α and β are the zeroes of the quadratic polynomial f(x) = ax² + bx + c, then evaluate :

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\frac{1}{α} - \frac{1}{β}

(iii)

\frac{1}{α} + \frac{1}{β} - 2 αβ

(iv) α²β − αβ²
(v) α⁴ + β⁴
(vi)

\frac{1}{a α + b} + \frac{1}{a β + b}

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\frac{β}{a α + b} + \frac{α}{a β + b}

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a (\frac{α^{2}}{β} + \frac{β^{2}}{α}) + b (\frac{α}{β} + \frac{β}{α})

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How many polypeptide chains are there in 1 Hb molecule?

The correct option is A 2 alpha & 2 betaThe hemoglobin molecule is made up of four polypeptide chains: two alpha chains of 141 amino acid residues each and two beta chains of 146 amino acid residues each.

The correct option is A 2 alpha & 2 beta
The hemoglobin molecule is made up of four polypeptide chains: two alpha chains of 141 amino acid residues each and two beta chains of 146 amino acid residues each.