heterotrophs also present). They have cellular body
organisation.
- (c)
- (b) Zoochlorellae often colour their hosts
green (e.g., green hydra and green Paramecium
bursaria).
10.(d) The testis of frog does not have interstitial cells.
- (b)
- (c) The correct route for passage of sperm in male
frog is from testes to Vasa- efferentia to kidney,
to Bidder’s canal, Urinogenital duct and later to
cloaca.
- (a)
- (a)
- (d)Joints between humerus and radio-ulna is called
hinge joint. It is a type of synovial joint which
allows movement in one plane only.
- (c)
- (c)
- (c)A= Retina –it contains the photoreceptors i.e.,
rods and cones.
- (d) Hormones like cortisol, testosterone, estradiol,
progesterone are all steroid hormones which take
part in regulationof gene expression. Hence, they
can easily pass through the cell membrane of the
target cell and bind to a receptor inside the nucleus.
- (b) Antibodies also called immunoglobulins
constitute the gamma globulin which are the part
of blood proteins. These are secreted by activated
B-cells or plasma cells.
- (a)
- (c) Lipid is formed when glycerol molecule
combines with fatty acid. Lipid is not a polymer
because it contains any one molecule. Proteins are
formed of units called amino acids. Polysaccharides
contains units of monosaccharides. Nucleic acids
is formed of nucleotides.
- (b)
- (d) X= 12 (ribs in human)
Y=7 ( true ribs)
There are 12 ribs in humans, among which first 7
are true ribs, which is attached to vertebral column
dorsally and ventrally to sternum.
- (c) Mackerel is a marine fish rich in omega-3-fatty
acids.
26.(b) The wall of the capillaries consists of only
tunica internae which is made up of simple
squamous endothelium. The wall of alveoli is also
very thin consisting of squamous epithlium.
27. (b) Blood comes to the kidneys from the abdominal
aorta and inferior vena cava, the large arteries
and veins that are part of the ascending aorta.
Oxygenated blood is brought to the kidneys from
a small branch called the renal artery.
The renal veins carry blood away from the kidneys.
28. (c) MTP or medically terminated pregnancy is done
in the first trimester and requires assistance of a
medical personnel.
29. (c) Transplantation technique is increasingly in use
today. Due to advances made in the field of surgery,
transplant of kidney and heart have become a
reality. But transplanted tissue or organ when its
immune action is triggered. To prevent rejection
of transplants immunosupressants are used.
30. (d) AV valve
31. (a) Blood Group ‘AB’ contains RBCs that have
both antigens ‘A’ and ‘B’ and thus it does not have
reactive antibodies in its plasma to these antigens.
32. (d)
33. (d) Petrovitch Pavlov in 1901 first demonstrated
the famous conditioned reflex”.
34. (c) Follicle stimulating hormone or FSH regulates
the production of sperms.
35. (b) Chlamydiasis is caused by Chlamydia
trachomatis of DEFGHIJK serotypes. Chlamydia
is an obligate intracellular pathogen. It causes
urethritis, epididymitis, mucopurulent, cervictis,
inflammation of fallopian tubes, proctitis (rectal
pain with mucus and occasional bleeding) etc. It
spreads by sexual contact with infected mating
partner.
36. (a) Pyelonephritis is an inflammation of the kidney
tissue, calyces and renal pelvis. It is commonly
caused by bacterial infection that has spread up the
urinary tract or travelled through the bloodstream to
the kidneys. In other words, pyelitis together with
nephritis is collectively known as pyelonephritis.
37. (c) Duodenum secretes hormone secretin.
38. (c) The plasma fluid that filters out from glomerular
capillaries into Bowman’s capsule of nephron is
called glomerular filtrate. A comparison of the
volume of the filtrate formed per day (180 L/day)
with that of the urine released (1.5L), suggests that
nearly 99% of the filtrate has to reabsorbed by the
renal tubules. This process is called reabsorption.
39. (b) The best-known component of gastric juice
is hydrochloric acid, the secretory product of the
parietal, or oxyntic cell.
