Gene mutation is caused by

MCQ

✓

Answer

Correct option: C.

Change in the sequence of nitrogenous base

c
(c)Gene mutations are sudden stable changes in the structure of gene or cistron due to change in nucleotide type and nucleotide sequence.

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List $I$	List $II$
$A$. Frederick Griffith	$I$. Genetic code
$B$. Francois Jacob and Jacque Monod	$II$. Semi-conservative mode of DNA replication
$C$. Har Gobind Khorana	$III$. Transformation
$D$. Meselson and Stahl	$IV$. Lac operon

Choose the correct answer from the options given below:

$I.$ Haemophilia is a sex-linked recessive disease

$II.$ Down's syndrome is due to aneuploidy

$III.$ Phenylketonuria is an autosomal dominant gene disorder

$IV.$ Phenylketonuria is an autosomal recessive gene disorder

$V.$ Sickle cell anaemia is an $X$-linked recessive gene disorder

Lymphocytes become more active.
Body attacks self cells.
More antibodies are produced in the body.
The ability to differentiate pathogens or foreign molecules from self cells is lost.