- Match the source gland with its respective hormone and
function and select the correct option.
Source Hormone Function
(a) Anterior pituitary Oxytocin Contraction of
uterus muscles
during child birth
(b) Posterior pituitary Vasopressin Stimulates
reabsorption of
water in the distal
tubules of the
nephron
(c) Corpus luteum Estrogen Supports pregnancy
(d) Thyroid Thyroxine Regulates blood
calcium level - In photorespiration, glycine moves from
(a) chloroplast to peroxisome
(b) peroxisome to mitochondrion
(c) mitochondrion to peroxisome
(d) chloroplast to mitochondrion. - Standing crops refers to
(a) all the photosynthetic living forms in an area
(b) all the living forms in an area
(c) the amount of living matter present in a unit area of an
ecosystem at any time
(d) all the crop plants in an area. - In which population interaction one species is harmed
whereas the other is unaffected?
(a) Amensalism (b) Commensalism
(c) Parasitism (d) All of these - If a homozygous dominant red-flowered plant is crossed with
a homozygous recessive white-flowered plant, the offsprings
will be
(a) 50% white flowers (b) 50% red flowers
(c) 100% white flowers (d) 100% red flowers. - Read the following statements and select the correct
options.- Synaptic cleft of neurons secrete adrenaline.
- Myelinated nerve fibres have Schwann cells which form
a myelin sheath around the axon. - In non-myelinated nerve fibres Schwann cells do not
form myelin sheath. - Spinal cord and cranial nerves are made of non-
myelinated nerve fibres.
(a) 1, 2 and 3 are correct while 4 is incorrect
(b) 3 and 4 are correct while 1 and 2 are incorrect
(c) 1 and 4 are correct while 2 and 3 are incorrect
(d) 2 and 3 are correct while 1 and 4 are incorrect.
- The loss or excretion of water in the form of liquid droplets
from the leaves and other parts of an uninjured or intact
plant is called
(a) guttation (b) transpiration
(c) plasmolysis (d) translocation.
73. The order of blood flow from right ventricle to left ventricle
in mammalian heart is
(a) Right ventricle → pulmonary arteries → lungs
→ pulmonary veins → left atrium
(b) Right ventricle → pulmonary veins → lungs
→ pulmonary arteries → left atrium
(c) Right ventricle → right atrium → lungs → pulmonary
veins → left atrium
(d) Right ventricle → systemic aorta → lungs
→ pulmonary veins → left atrium.
74. Choose the correct statement.
(a) Oxygen is vital in respiration to drive the process by
removal of hydrogen.
(b) Pyruvate is formed in the mitochondrial matrix.
(c) There is complete oxidation of glucose in fermentation.
(d) During the oxidation of succinic acid a molecule of ATP
is synthesised.
75. The food chain, in which micro-organisms breakdown the
energy rich compounds synthesised by the producers is
called
(a) grazing food chain (b) detritus food chain
(c) parasitic food chain (d) predator food chain.
76. Find out the mismatched pair.
(a) Primary CO 2 fixation → OAA
product of C 4 plants
(b) Primary CO 2 acceptor → RuBP
of C 3 plants
(c) Calvin pathway of → Bundle sheath
C 4 plants occur in
(d) C 3 plant → Maize
77. Myxoedema occurs due to
(a) hypersecretion of thyroid hormone
(b) hyposecretion of thyroid hormone
(c) hypersecretion of parathormone
(d) hyposecretion of parathormone.
78. Urea synthesis takes place primarily in liver because
(a) NH 3 and CO 2 are present in liver only
(b) hormone ADH is found in liver only
(c) enzyme arginase is present in liver only
(d) kidney is smaller than liver.
79. According to Central Pollution Control Board (CPCB), the
size of particulate matter that is most harmful is
(a) 25 mm (b) 2.5 mm
(c) 0.25 mm (d) 0.025 mm.
80. Hotspots of biodiversity means
(a) areas of the earth that contain many endemic species
(b) species that serve as proxy for entire communities in
particular area
(c) species in particular niche/area
(d) species diversity at particular area.
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