Spindle fibres attach on to :-
(1) Telomere of the chromosome
(2) Kinetochore of the chromosome
(3) Centromere of the chromosome
(4) Kinet
osome of the chromosome

Which is the National Aquatic Animal of India ?
(1) Gangetic shark
(2) River dolphin
(3) Blue whale
(4) Sea-horse

Which of the following is required as inducer(s) for
the expression of Lac operon ?
(1) Glucose
(2) Galactose
(3) Lactose
(4) Lactose and galactose

Which of the following pairs of hormones are not
antagonistic (having opposite effects) to each other?
(1) Parathormone - Calcitonin
(2) Insulin - Glucagon
(3) Aldosterone - Atrial Natriuretic Factor
(4) Relaxin - Inhibin

Microtubules are the constituents of :-
(1) Cilia, Flagella and Peroxisomes
(2) Spindle fibres, Centrioles and Cilia
(3) Centrioles, Spindle fibres and Chromatin
(4) Centrosome, Nucleosome and Centrioles

A complex of ribosomes attached to a single strand
of RNA is known as :-
(1) Polysome
(2) Polymer
(3) Polypeptide
(4) Okazaki fragment

Fertilization in humans is practically feasible only if:-
(1) the sperms are transported into vagina just after
the release of ovum in fallopian tube
(2) the ovum and sperms are transported
simultaneously to ampullary isthmic junction of
the fallopian tube
(3) the ovum and sperms are transported
simultaneously to ampullary - isthmic junction
of the cervix
(4) the sperms are transported into cervix within
48 hrs of release of ovum in uterus

Asthma may be attributed to :
(1) bacterial infection of the lungs
(2) allergic reaction of the mast cells in the lungs
(3) inflammation of the trachea
(4) accumulation of fluid in the lungs

The Avena curvature is used for bioassay of :
(1) ABA
(2) GA3
(3) IAA
(4) Ethylene

The standard petal of a papilionaceous corolla is
also called :
(1) Carina
(2) Pappus
(3) Vexillum
(4) Corona

Tricarpellary syncarpous gynoecium is found in
flowers of :
(1) Liliaceae
(2) Solanaceae
(3) Fabaceae
(4) Poaceae

One of the major components of cell wall of most
fungi is :-
(1) Chitin
(2) Peptidoglycan
(3) Cellulose
(4) Hemicellulose

Select the incorrect statement :
(1) FSH stimulates the sertoli cells which help in
spermiogenesis
(2) LH triggers ovulation in ovary
(3) LH and FSH decrease gradually during the
follicular phase
(4) LH triggers secretion of androgens from the
Leydig cells

In meiosis crossing over is initiated at :
(1) Pachytene
(2) Leptotene
(3) Zygotene
(4) Diplotene

A tall true breeding garden pea plant is crossed with
a dwarf true breeding garden pea plant. When the
F1 plants were selfed the resulting genotypes were
in the ratio of :
(1) 1 : 2 : 1 :: Tall homozygous : Tall heterozygous
: Dwarf
(2) 1 : 2 : 1 :: Tall heterozygous : Tall homozygous
: Dwarf
(3) 3 : 1 :: Tall : Dwarf
(4) 3 : 1 :: Dwarf : Tall