HSST Zoology Questions and Answers
1. The term “molecular stitcher” refers to
A) DNA polymerases B) DNA ligase C) DNA glycosylases D) DNA methylation
Ans: B) DNA ligase
2. A DNA strand having the base sequences
ATTGCCAATAC is mutated to ATTGCCAAGAC, the mutation that occurs is termed as
A) Transduction B) Translocation C) Transition D) Transversion
Ans: D) Transversion
3. When the temperature and pressure
remains constant the rate of diffusion of a gas will
be inversely proportional to the square
root of the density states is the
A) Graham’s Law of diffusion
B) Max Planck theory
C) Bohr theory
D) Avagadro’s law
Ans: A) Graham’s Law of diffusion
4. Glutamate is the precursor of
aminoacids
A) Proline and arginine
B) Proline and cysteine
C) Glycine and cysteine
D) Arginine and glycine
Ans: A) Proline and arginine
5. Sensory hair cells in the cristae
ampullaries contact
A) Striavascularis
B) Gelatinous cupola
C) Basilar membrane
D) Associated hairs
Ans: B) Gelatinous cupola
6. The fight, flight and fright hormone is
A) Adrenalin B) Pituitary C) FSH D) Aldosterone
Ans: A) Adrenalin
7. Severe combined immune deficiency is a
genetic defect due to deficiency of
A) Adenosine triphosphatase
B) Maleyl acetoacetic acid
C) Transaminase
D) Adenosine deaminase
Ans: D) Adenosine deaminase
8. An inborn error in the metabolism of the
amino acid tyrosine is associated with
A) Alkaptonuria B) Phenylketonuria C) Albinism D) Cretinism
Ans: C) Albinism
9. Which one of the following is notan
extraembryonic membrane ?
A) Amnion B) Albumin C) Chorion D) Allantois
Ans: B) Albumin
10. Egg of petromyzoneis
A) Isolecithal B) Macrolecithal C) Mesolecithal D) Microlecithal
Ans: C) Mesolecithal
11. Galactosaemia is a congenital disease
when normal metabolism of galactose is lacking
an enzyme
A) Galactose-1-phosphate uridyltransferase
B) Galactose-1-phosphatase
C) Galactose-1-2-phosphatase
D) Galactose-1-phosphate transferase
Ans: A) Galactose-1-phosphate uridyltransferase
12. The physiologically active form of
pantothenic acid essential for metabolism
A) Acetylcholine B) Choline C) Coenzyme A D) None of the above
Ans: C) Coenzyme
13. Bitot’s spots is caused by the
deficiency of
A) Vitamin A B) Vitamin D C) Vitamin K D) Vitamin B
Ans: A) Vitamin A
14. Erythrocytes do not transport the
enzyme
A) Choline esterase
B) Carbonic anhydrase
C) Permease
D) Methaemoglobin reductase
Ans: A) Choline esterase
15. Composite molecule of DNA in which a
foreign DNA has been inserted into a vector
molecule are called
A) Foreign DNA
B) DNA chimaeras
C) Target DNA
D) Passenger DNA
Ans: B) DNA chimaeras
16. In 1970, an enzyme for cutting the DNA
was discovered from the bacterium
A) Haemophilous influenzae
B) Escherichia coli
C) Methanosarcina
D) Helicobacter pylori
Ans: A) Haemophilous influenzae
17. Bidder’s canal is present in kidney of
A) Frog B) Crocodile C) Tortoise D) Snake
Ans: A) Frog
18. First test tube baby of the world was
born on
A) 26th July 1978
B) 26th May 1987
C) 25th July 1978
D) 25th May 1987
Ans: C) 25th July 1978
19. An instrument used to scan a patients
body, by a narrow X-ray beams guided by
computer and thin sections of organs are
photographed from several angles
A) CTS B) CAT C) NMR D) CET
Ans: B) CAT
20. Deficiency of an enzyme
beta-D-N-acetyl-hexosaminidase causes
A) Beta-thalassemia
B) Tay Sachs disease
C) Galactosemia
D) Alkaptonuria
Ans: B) Tay Sachs disease
21. 45 + XX in human indicates
A) Patau’s syndrome B) Jacob’s syndrome C) Klinefelter’s syndrome D) Down’s syndrome
Ans: D) Down’s syndrome
22. Warm blooded animals are larger in size
in the colder region when compared to
hotterreagions
A) Bergman’s law B) Cope’s law C) Allen’s law D) Dollow’s law
Ans: A) Bergman’s law
23. During glycolysis glucose is
phosphorylated into
A) Glucose 6 phosphate
B) Glucose 1-6-diphosphate
C) Fructose 1, 6-diphosphate
D) Fructose 6 phosphate
Ans: A) Glucose 6 phosphate
24. A method used for sequencing whole
genomes by breaking the DNA is
A) Shotgun sequencing
B) Western blotting
C) Southern blotting
D) Northern blotting
Ans: A) Shotgun sequencing
25. Chemical degradation of DNA protocol was
developed by
A) Sanger B) Miller C) Gilbert D) Maxam-Gilbert
Ans: D) Maxam-Gilbert
26. Bioinformatics as a tool in biological
science is the contribution of
A) Richard Stallman
B) Margaret Oakley Dayhoff
C) Stephen Hawking
D) Pearson
Ans: B) Margaret Oakley Dayhoff
27. Most widely used program for comparing the
amino acid sequences of different proteins or nucleotide sequences of DNA.
A) BLAST B) FASTA C) ORF Finder D) STAG
Ans: A) BLAST
28. The most suitable and efficient
language used in bioinformatics
A) HTML
B) Perl and Python
C) JAVA
D) MAGE
Ans: B) Perl and Python
29. The active swimming organisms living in
surface and deeper waters
A) Zooplankton B) Benthos C) Nektons D) Neuston
Ans: C) Nektons
30. The true and complete metamorphosis
occurs in
A) Silver fishes
B) Moths and mosquitos
C) Bed bugs
D) Cockroach
Ans: B) Moths and mosquitos
31. Wrinkles in old age is due to
A) Collagen fibres B) Actin fibres C) Myosin fibres D) Mucin
Ans: A) Collagen fibres
32. Muscle glycogen cannot be converted
into glucose due to the absence of an enzyme
A) Arginase
B) Glucose-6-phosphatase
C) Glucose phosphatase
D) Fructase
Ans: B) Glucose-6-phosphatase
33. Minimum turnover number of an enzyme
is, for
A) Lysozyme B) Carbonic anhydrase C) DNA polymerase D) Sucrase
Ans: A) Lysozyme
34. The direct cleavage of covalent bonds
and removal of groups without addition of H2O
is a characteristic of
A) Lyases B) Ligases C) Amylase D) Lactase
Ans: Lyases
35. The technique used for opening
partially blocked coronary vessels before they become
totally occluded
A) Angiogram B) EEG C) Angioplasty D) ECG
Ans: C) Angioplasty
36. Thrombosis in which coronary artery is
related most frequently in myocardial infraction
A) Left coronary artery
B) Right coronary artery
C) Left pulmonary artery
D) Right pulmonary artery
Ans: A) Left coronary artery
37. Glands of swammerdams is associated
with
A) Reproductive system
B) Nervous system
C) Circulatory system
D) Muscular system
Ans: B) Nervous system
38. Leydig cells are meant for the
production of
A) Testosterone B) Progesterone C) Oestrogen D) Aldosteron
Ans: A) Testosterone
39. During polymerization the mismatched
residues at the primer terminus is removed and
the accuracy of DNA replication is done by
A) Exonuclease
B) DNA polymerase II
C) DNA polymerase III
D) DNA polymerase I
Ans: D) DNA polymerase I
40. A hormone which stimulate the activity
of adenyl cyclase and increases the cAMP level
A) Adrenocorticoid B) Steroid C) Cataecholamines D) Pituitary
Ans: C) Cataecholamines
41. Deficiency of thyroid hormone in adults
causes the disease
A) Grave’s disease B) Gull’s disease C) Basidow’s disease D) Addison’s disease
Ans: B) Gull’s disease
42. The activated adenyl cyclase serves as
a biochemical amplifier and catalyses the
hydrolysis of ATP to cAMP, in the presence
of
A) Na+ and Cl+
B) K+ and Cl+
C) Ca++ K++
D) Ca++ and Mg++
Ans: D) Ca++ and Mg++
43. The ruptured follicle in mammalian
ovary after the release of ovum which later gets
fertilized to form
A) Corpus luteum
B) Graafian follicle
C) Corpus callosum
D) Corpus albican
Ans: A) Corpus luteum
44. The Nobel prize in physiology in 1995
for their discovery concerned with the genetic
control of early embryonic development was
for
A) Nusslein and Wieschaus
B) Wolpert
C) Jacob and Monord
D) Lewies
Ans: A) Nusslein and Wieschaus
45. Homeotic genes of Drosophila include a
180-nucleotide sequence called the
A) Torpido B) Homoeodomine C) Spatzal D) Homeobox
Ans: D) Homeobox
46. Oxygen is directly used during
A) Fermentation
B) Krebs citric acid cycle
C) Biomethanisation
D) Glycolysis
Ans: B) Krebs citric acid cycle
47. Dissolved oxygen needed for microbes is
measured by
A) COD B) BOD C) DO D) TDS
Ans: B) BOD
48. A mutant strain of neurospora which
falls to grow on a minimal medium unless
supplemented with a nutrient is called
A) Auxotrop B) Mixotrop C) Paratop D)
Holotrop
Ans: A) Auxotrop
49. First Indian Scientist who got Nobel
prize for deciphering the genetic code
A) Amartyasen
B) Venkatraman Ramakrishnan
C) C. V. Raman
D) Khorana
Ans: D) Khorana
50. The part of an antigen that is
recognised by the immune system, specifically by
antibodies, B cells or T cells
A) Antigens
B) Epitopes
C) Haptens
D) None of the above
Ans: B) Epitopes