21. Concanavalin A is
(1) an alkaloid (2) an essential oil (3) a lectin
(4) a pigment
Answer (3) a lectin
22. Which one of the
following equipments is essentially required for growing microbes on a large
scale, for industrial production of enzymes?
(1) BOD incubator (2) Sludge digester (3)
Industrial oven (4) Bioreactor
Answer (4) Bioreactor
23. Consider the
following statement :
(A) Coenzyme or metal
ion that is tightly bound to enzyme protein is called prosthetic group.
(B) A complete catalytic active enzyme with its bound
prosthetic group is called apoenzyme.
Select the correct
option:
(1) Both (A) and (B) are true.
(2) (A) is true but (B) is false.
(3) Both (A) and (B) are false.
(4) (A) is false but (B) is true.
Answer (2)
24. Purines found
both in DNA and RNA are
(1) Adenine and thymine
(2) Adenine and guanine
(3) Guanine and cytosine
(4) Cytosine and thymine
Answer (2)
25. Select the
correct sequence for transport of sperm cells in male reproductive system.
(1) Testis -> Epididymis -> Vasa efferentia -> Rete testis -> Inguinal canal->Urethra
(2) Seminiferous
tubules ->Rete testis-> Vasa efferentia ->Epididymis->Vas deferens ->Ejaculatory duct -> Urethra-> Urethra l meatus
(3) Seminiferous tubules-> Vasa
efferentia -> Epididymis -> Inguinal
canal ® Urethra
(4) Testis ->Epididymis->Vasa
efferentia ->Vas deferens-> Ejaculatory duct ®Inguinal canal -> Urethra-> Urethral meatus
Answer: (2)
Seminiferous tubules -> Rete testis->Vasa
efferentia ->Epididymis-> Vas deferens ->Ejaculatory
duct -> Urethra-> Urethral meatus
26. Match the
hominids with their correct brain size :
(a) Homo habilis (i) 900 cc
(b) Homo neanderthalensis (ii) 1350 cc
(c) Homo erectus (iii) 650-800 cc
(d) Homo sapiens (iv) 1400 cc
27.Select the correct
option. (a) (b) (c) (d)
(1) (iii) (i) (iv) (ii)
(2) (iii) (ii) (i) (iv)
(3) (iii) (iv) (i) (ii)
(4) (iv) (iii) (i) (ii)
Answer (3): (3) (iii) (iv) (i) (ii)
28. Variations caused
by mutation, as proposed by Hugo de Vries are
(1) random and directional
(2) random and directionless
(3) small and directional (4) small and directionless
Answer (2) (2) random and directionless
29. Which of the
following pair of organelles does not contain DNA?
(1) Mitochondria and Lysosomes
(2) Chloroplast and
Vacuoles
(3) Lysosomes and Vacuoles
(4) Nuclear envelope
and Mitochondria
Answer (3) Lysosomes and
Vacuoles
30. Due to increasing
air-borne allergens and pollutants, many people in urban areas are suffering
from respiratory disorder causing wheezing due to
(1) benign growth on
mucous lining of nasal cavity
(2) inflammation of bronchi and bronchioles
(3) proliferation of fibrous tissues and damage of the
alveolar walls
(4) reduction in the
secretion of surfactants by pneumocytes.
Answer (2) inflammation of
bronchi and bronchioles