MH SET 2013: 1 December, Paper II, Life Sciences
Text of page 2
DEC - 34213/II 2
Text of page 3
DEC - 34213/II
Life Sciences
Paper II
Time Allowed : 75 Minutes] [Maximum Marks : 100
Note : This Paper contains Fifty (50) multiple choice questions, each question
carries Two (2) marks. Attempt All questions.
1. In a tissue, cells interact through a 3. Which of the sub-classes of
structure is called : antibodies are found in blood serum
(A) Hemi-desmosomes and secretions ?
(B) Desmosomes (A) IgG1, IgG4
(C) Desmoplakin (B) IgG2, IgG3
(D) Gap junction
(C) IgA1, IgA2
2. Immunoglobulin heavy and light
(D) IgG1, IgG3
chains undergo structural modifi-
4. The membrane enclosing the main
cations after antigen stimulation is
vacuole of a cell is termed :
called :
(A) tonoplast
(A) hypermutation
(B) somatic recombination (B) chloroplast
(C) somatic mutation (C) amyloplast
(D) allelic exclusion (D) elaioplast
3 [P.T.O.
Text of page 4
DEC - 34213/II
5. Maturation promoting factor (MPF) 7. Dosage compensation in Drosophila
of oocytes is also known as mitosis is characterized by :
promoting factor. Which of the (A) alteration of transcription rates
following represents MPF ? of X chromosome in male
(A) Cyclin A—cdk 1 (B) heterochromatinization of X
chromosome in female
(B) Cyclin B—cdk 4
(C) absence of chromocenter in
(C) Cyclin B—cdk 1
males
(D) Cyclin D—cdk 6
(D) induction of puffs on polytene
6. Which of the following intermediate
chromosomes
filament proteins is present in
8. In bacterial protein synthesis, the
animal cells ?
initiating amino acid is :
(A) Desmin (A) N-formyl methionine
(B) Vimentin (B) Methionine
(C) Lamin (C) Glutamic acid
(D) Keratin (D) Cysteine
4
Text of page 5
DEC - 34213/II
9. In Escherichia coli the trp operon is 11. Which of the following fatty acid
is a precursor for prostaglandin
regulated by :
biosynthesis ?
(A) Attenuation
(A) Arachidonic acid
(B) Repression
(B) Valeric acid
(C) Induction
(C) Palmitic acid
(D) Attenuation and repression (D) Linolenic acid
10. DNA and RNA synthesis differs 12. What will be the pH of acetate-
from each other with respect to the acetic acid buffer, when the ratio
of [acetate]/ [acetic acid] is 10 ?
requirement of :
(Given pKa = 4.76)
(A) Template
(A) 3.76
(B) Polymerase
(B) 4.76
(C) Primer
(C) 5.76
(D) Phosphodiester bond formation (D) 2.76
5 [P.T.O.
Text of page 6
DEC - 34213/II
13. During amino acid metabolism 16. Which of the following terms is used
amino groups are excreted in for the salt tolerant plants
mammals in the form of : genetically adapted to salinity ?
(A) Ammonia (A) Glycophytes
(B) Urea (B) Halophytes
(C) Uric acid (C) Mesophytes
(D) Glutamate (D) Hydrophytes
14. Which of the following coenzymes is 17. The pH of acid in stomach can be
not involved in group transfer ? lowered by using .................. pump.
(A) Lipoic acid (A) Gastric Na+/K+ ATPase
(B) TPP (B) Gastric H+/K+ ATPase
(C) Coenzyme A (C) Calcium ATPase
(D) NAD+ (D) Lactose permease
15. Xerophthalmia is caused by 18. Cyclic GMP is a secondary
deficiency of : messenger for :
(A) Vitamin A (A) atrial natriuretic hormone
(B) Vitamin D (B) parathormone
(C) Vitamin K (C) somatostatin
(D) Vitamin C (D) prolactin
6
Text of page 7
DEC - 34213/II
19. During seed development, embryo 21. Which of the following statements
becomes tolerant to dessication and about fertilization is wrong ?
the seed dehydrates due to the
(A) It restores diploid chromosomal
presence of :
number
(A) Indole acetic acid
(B) It results in formation of the
(B) Kinetin
first polar body
(C) Polyamines
(C) Polyspermy is prevented by
(D) Abscisic acid
the zona reaction
20. Which of the following is not a
(D) It determines the genetic sex of
feature of magetotactic bacteria ?
the zygote
(A) Have magnetosomes containing
22. A human male carrying an allele for
Fe3O4 or Fe3S4
a trait on the X chromosome is :
(B) Are motile, gram negative
(A) hemizygous
(C) Are highly aerobic
(B) homozygous
(D) Have magnetosomes arranged
(C) heterozygous
linearly across long axis of the
cell (D) monozygous
7 [P.T.O.
Text of page 8
DEC - 34213/II
23. In X-linked recessive inheritance : 25. Satellite DNAs are not typically
(A) most affected individuals are found within which of the following
female parts of a chromosome ?
(B) the trait does not skip (A) Heterochromatin
generations
(B) Euchromatin
(C) the daughters of affected father
(C) Telomeres
should be affected
(D) Centromeres
(D) the sons of affected females
should be affected 26. In a paternity dispute a woman
24. The common type of duplication with blood group AB claimed that
generates : one of four men, each with different
(A) a second copy of the gene in close blood types, was the father of her
proximity of the first copy child. If the blood group of child is
(B) a second copy of the gene in a A then the blood group of the father
distant location on a same can be :
chromosome
(A) A
(C) a second copy of the gene on a
(B) A or O
different chromosome
(C) B
(D) any of the above situations with
equal probability (D) A, B, O, AB
8
Text of page 9
DEC - 34213/II
27. A hypothetical organism has six
29. Which one of the following is a
chromosomes (2n = 6). How many
different combinations of maternal
deuterostome phylum ?
and paternal chromosomes can
appear in the gametes ?
(A) Porifera
(A) 8
(B) 12 (B) Cnidaria
(C) 36
(C) Mollusca
(D) 6
28. Silent mutation :
(D) Hemichordata
(A) creates a premature stop codon
(B) substitutes one amino acid for 30. The “Serial Endosymbiosis” theory
a different amino acid with
similar properties so it does not was proposed by :
affect protein function
(A) Alfred Wegener
(C) changes only one DNA base in
a codon without changing the
(B) Thomas Cavalier-Smith
amino acid sequence
(D) occurs outside protein coding
(C) Lynn Margulis
region in the 5′ and 3′ untrans-
lated region and thus does not
(D) Robert Whittaker
affect protein function
9 [P.T.O.
Text of page 10
DEC - 34213/II
31. The “thermal proteinoid” theory 33. In a genetically polymorphic
explaining the origin of life was population, balancing selection is
concerned with successful reproduc-
proposed by :
tion of .......................... individuals.
(A) Woese, Crick and Orgel
(A) homozygous recessive
(B) Sidney Fox
(B) heterozygous
(C) Stanley Miller and Harold
(C) homozygous dominant
Urey
(D) both homozygous recessive and
(D) David Deame and Joan Oro
dominant
32. A species inhabiting different
34. During evolution, genetic drift
geographical areas is called :
occurs in a :
(A) sibling species
(A) Mendelian population
(B) ecotypes (B) Large population
(C) sympatric (C) Large population in an island
(D) allopatric (D) Small population
10
Text of page 11
DEC - 34213/II
35. The population genetic models that 37. Ozone pollution is indicated by
show how genetic variation is leaves of plants in the form of :
retained in Mendelian inheritance
(A) Intercostal bronzing
was proposed by :
(B) Minute chlorotic dots
(A) Hardy and Weinberg
(C) Tip and margins browning
(B) Darwin
(D) Watery film on epidermis
(C) Kimura
38. The growth curve of a species
(D) Wallace
flattening into a plateau of
36. Mangroves are ecologically
population indicates :
important because :
(A) Decrease of growth rate
(A) They are evergreen
(B) Equality of growth and death
(B) They provide nurseries for
rates
many marine organisms
(C) Increase in death rate
(C) They harbour mosquitoes and
spread diseases (D) Progress of the species towards
(D) They are medicinally useful extinction
11 [P.T.O.
Text of page 12
DEC - 34213/II
39. Presence of Escherichia coli in water 41. A phosphate cycle is known as cycle
of a limiting nutrient in nature.
indicates :
Phosphate is made available to
(A) Faecal pollution
biotic components of an ecosystem
by :
(B) Chemicals in water
(A) water
(C) Pesticides in water
(B) rocks and soil
(D) Oil pollution
(C) biological fixation
40. Aquatic ecosystems are of two types :
(D) a symbiotic process
lentic and lotic. Which one of the
42. Acid rain is caused due to which of
following is not lotic ? the following air pollutants :
(A) Oxides of nitrogen
(A) Stream
(B) Sulfur dioxide
(B) River
(C) Carbon dioxide
(C) Flowing water
(D) Oxides of nitrogen and sulfur
(D) Lake dioxide
12
Text of page 13
DEC - 34213/II
45. A lineage which occupies an
43. The microorganism involved in
adaptive zone which is different in
making of blue cheese is :
some ways from any other lineage
in its range and which evolves
(A) Pseudomonas aeruginosa
separately from all lineages outside
(B) Blue Green cyanobacteria its range denotes :
(A) Biological species
(C) Penicillium roquetortii
(B) Recognition species
(D) Aspergillus flavus
(C) Ecological species
44. Which of the following represents a (D) Phylogenetic species
direct use of biodiversity ? 46. Ramsar Convention on Wetlands
of International Importance was
(A) Nutrient cycling
adopted in :
(B) Pest-control (A) 1987
(B) 1981
(C) Photosynthesis
(C) 1971
(D) Biological control
(D) 1970
13 [P.T.O.
Text of page 14
DEC - 34213/II
47. Gulf of Mannar and Nilgiris in India 49. A group of organisms at any
particular level in a system of
are :
classification is called a :
(A) Biosphere Reserves
(A) Species
(B) Sanctuaries
(B) Genus
(C) World Heritage Sites
(C) Taxon
(D) National Zoological Parks (D) Class
48. Characteristics that have arisen as 50. Certain responses in bacteria are
a result of common evolutionary strictly dependent upon microbial
population size. This is described
descent are said to be :
as :
(A) analogous
(A) Quorum sensing behaviour
(B) heterologous
(B) Social behaviour
(C) homogeneous
(C) Growth-controlling behaviour
(D) homologous (D) Chemotactic behaviour
14
Text of page 15
DEC - 34213/II
ROUGH WORK
15 [P.T.O.
Text of page 16
DEC - 34213/II
ROUGH WORK
16Official key not published for this paper.
Page 1 of 16
Source: Savitribai Phule Pune University. Question paper published by Savitribai Phule Pune University.