Stomata in grass leaf are
(1) Dumb-bell shaped
(2) Kidney shaped
(3) Rectangular
(4) Barrel shaped

Match the items given in Column I with those in
Column II and select the correct option given
below:
Column I Column II
a. Tricuspid valve i. Between left atrium
and left ventricle
b. Bicuspid valve ii. Between right
ventricle and
pulmonary artery
c. Semilunar valve iii. Between right
atrium and right
ventricle
a b c
(1) iii i ii
(2) i iii ii
(3) i ii iii
(4) ii i iii

Calcium is important in skeletal muscle contraction
because it :-
(1) binds to troponin to remove the masking of
active sites on actin for myosin.
(2) activates the myosin ATPase by binding to it.
(3) detaches the myosin head from the actin
filament.
(4) prevents the formation of bonds between the
myosin cross bridges and the actin filament.

Identify the wrong statement with reference to
the gene ‘I’ that controls ABO blood groups.
(1) The gene (I) has three alleles.
(2) A person will have only two of the three
alleles.
(3) When IA and IB are present together, they
express same type of sugar.
(4) Allele ‘i’ does not produce any sugar.

The process responsible for facilitating loss of water
in liquid form from the tip of grass blades at night
and in early morning is :
(1) Transpiration
(2) Root pressure
(3) Imbibition
(4) Plasmolysis