Pick out the correct statement.
I. Haemophilia is a sex-linked recessive disease
II. Down's syndrn=me is due to aneuploidy
III. Phenylketonuria is an autosomal recessive gene disorderIv. Sickle cell anaemia is an X-linked recessive gene disorder
II and IV are correct
I, III and IV are correct
I, II and III are correct
I, II and III are correct
C.
I, II and III are correct
Sickle cell anaemia is an autosomal recessive disorder
Which of the following is not required for any of the techniques of DNA fingerprinting available at present?
Zinc finger analysis
Restriction enzymes
DNA-DNA hybridization
DNA-DNA hybridization
Select the incorrect statement
LH and FSH triggers ovulation in ovary
LH and FSH decrease gradually during the follicular phase
LH triggers secretion of androgens from the Leydig cells
LH triggers secretion of androgens from the Leydig cells
Asthma may be attributed to
allergic reaction of the mast cells in the lungs
inflammation of the trachea
accumulation of fluid in the lungs
accumulation of fluid in the lungs
The two polypeptides of human insulin are linked together by
phosphodiester bonds
covalent bonds
disulphide bridges
disulphide bridges
The coconut water from tender coconut represents
fleshy mesocarp
free-nuclear proembryo
free-nuclear endosperm
free-nuclear endosperm
Which of the following is not a feature of the plasmids?
Circular structure
Transferable
Single stranded
Single stranded
Which is the National Aquatic Animal of India?
River dolphin
Blue whale
Sea-horse
Sea-horse
Which of the following is the most important cause of animals and plants being driven to extinction?
Alien species invasion
Habitat loss and fragmentation
Co-extinctions
Co-extinctions