Choose the wrong statement - Vidyadip

MCQ

Choose the wrong statement

A
Respiratory pigments are coloured pigments
B
Respiratory pigments have special affinity for respiratory gases
C
Respiratory pigments are the coloured proteins which contain a metallic ion
✓
None of the above

✓

Answer

Correct option: D.

None of the above

d
It’s obvious.

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(i) Sickle-cell anaemia is caused by the substitution of A by B at 6th position of the C globin chain of Haemoglobin.
(ii) In phenylketonuria, the individual lacks an enzyme that converts the amino acid phenylalanine into D.
(iii) Failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome called E.
(iv) In F, there is an increase in a whole set of chromosome in an organism.
(v) Down's syndrome is genetic disorder because of presence of an additional copy of chromosome number G.
(vi) In H syndrome, there is an additional copy of X-chromosome resulting into a karyotype of 47, XXY.
(vii) In I syndrome, there is an absence of one of the X-chromosome, i.e. 45 with XO.
(viii) The traits that are generally controlled by 3 or more genes are called J traits.
(ix) When single gene exhibit multiple phenotypic expression, it is called K gene.
(x) In honey bee, females are L having M chromosome and males are N having 16 chromosome. This is called O sex-determination system.
(xi) Colour blindness is P - linked Q disorder. This defect is due to mutation in certain genes present in R chromosome.
(xii) Thalassemia is S-linked T disease. It is controlled by two closely linked genes U and Von chromosome W of each parent.
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$(I)$ $RBCs$ are formed in the white bone marrow in adults.

$(II)$ $RBCs$ have red colour because presence of protein called haemoglobin.

$(III)$ Nucleus is present in $RBC$ in most of the mammals and are biconcave in shape.

$(IV)$ A healthy individual has $12 -16\, gms$ of haemoglobin in every $1000\, ml$ of blood.

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What percentage of homozygous $R h^{-i i}$ will be born amongst four children of a couple where the husband is heterozygous for $R h^{+i i}$ and wife is homozygous for $R h^{-i i}$ gene?