Karnataka CET- 2014(Biology)

Question 1 of 57

1. Question

Mating of two varieties of a cattle breed like Red Dane which have no common ancestors on either side of their pedigree up to 4-6 generations is an example for _____

Inbreeding
Cross breeding
Out crossing
Inter-specific hybridization

Question 2 of 57

2. Question

Statement A: Photorespiration decreases photosynthetic output

Statement B: In photorespiratory pathway, neither ATP nor NADPH is produced

Both the statements A and B are correct
Both the statements A and B are wrong
Statement A is correct and statement B is wrong
Statement B is correct and statement A is wrong

Question 3 of 57

3. Question

Identify the incorrect statement from the following

The reservoir pool for phosphorous cycle is earth’s crust whereas atmosphere is the reservoir pool for carbon cycle
During the carbon cycle and phosphorous cycle, there is very little respiratory release of carbon and phosphorous respectively
Atmospheric inputs of phosphorous through rainfall are much smaller than carbon inputs
Gaseous exchanges of phosphorous between organism and environment are negligible

Question 4 of 57

4. Question

The result of the following reaction/experiment carried out by Avery et. al. on Streptococcus pneumonia has proved conclusively that DNA is the genetic material

Live ‘R’ strain + DNA from ‘S’ strain + DNAase
Heat killed ‘R’ strain + DNA from ‘S’ strain + DNAase
Live ‘R’ strain + DNA from ‘S’ strain + RNAase
Live ‘R’ strain + Denatured DNA of ‘S’ strain + protease

Question 5 of 57

5. Question

Match the storage products listed under Column I with the organisms given under Column II; choose the appropriate option from the given choices

	Column – I		Column – II
A	Glycogen	p	Sargassum
B	Pyrenoids	q	Nostoc
C	Laminarin and mannitol	r	Polysiphonia
D	Floridean starch	s	Spirogyra
		t	Agaricus

A - r, B - s, C - p, D - t
A - s, B - r, C - t, D - q
A - t, B - s, C - p, D - r
A - q, B - p, C - s, D – r

Question 6 of 57

6. Question

Identify the desirable characteristics for a plasmid used in rDNA technology from the following

Ability to multiply and express outside the host in a bioreactor
A highly active promoter
A site at which replication can be initiated
One or more identifiable marker genes
One or more unique restriction sites

A, C and E only
B, C and E only
A, C, D and E only
B, C, D and E only

Question 7 of 57

7. Question

Which compounds were used by Miller in his experiment for obtaining amino acids and other organic substances?

Carbon dioxide, water vapour and methane
Methane, ammonia, water vapour and hydrogen cyanide
Ammonia, methane, hydrogen and water vapour
Ammonia, methane and carbon dioxide

Question 8 of 57

8. Question

Which of the following is true for eutrophicated water body?

High mineral content
High oxygen content
Rich species diversity
Low organic content

Question 9 of 57

9. Question

IUDs which are used by females _____

Act as spermicidal jellies
Block the entry of sperms into vagina
Are implanted under the skin and they release progesterone and estrogen
Release copper ions in the uterus that increase phagocytosis of sperms

Question 10 of 57

10. Question

Which of the following hormones are secreted in large quantities during pregnancy in women?

hCG, progesterone, estradiol and FSH
hCG, hPL, progesterone, estrogen and LH
LH, estrogen and estradiol
hCG and hPL

Question 11 of 57

11. Question

With respect to angiosperms, identify the incorrect pair from the following

Antipodals – 2n
Vegetative cell of male gametophyte – n
Primary endosperm nucleus – 3n
Cells of nucellus of ovule – 2n

Question 12 of 57

12. Question

Statement A: For a particular character in an individual, each gamete gets only one allele

Statement B: Chromatids of a chromosome split (separate) and move towards opposite poles during anaphase of mitosis

Both the statements are correct and B is the reason for A
Both the statements are correct and B is not a reason for A
Statement A is correct and statement B is wrong
Statement B is correct and statement A is wrong

Question 13 of 57

13. Question

Internal bleeding, muscular pain, blockage of the intestinal passage and anaemia are some of the symptoms caused due to infection by _____

Wuchereria
Trichophyton
Ascaris
Plasmodium

Question 14 of 57

14. Question

RNA interference which is employed in making tobacco plant resistant to Meloidegyne incognita is essentially involved in _____

Preventing the process of translation of mRNA
Preventing the process of transcription
Preventing the process of replication of DNA
Preventing the process of splicing of hnRNA

Question 15 of 57

15. Question

The success of mammals on earth is largely because

The can conform to the changes in the environment
They can reduce metabolic activity and go into a state of dormancy during unfavourable conditions in the environment
They have the ability to maintain constant body temperature
They can take care of their young ones as they have mammary glands to suckle them

Question 16 of 57

16. Question

Which one of the following hormones also produces anti-inflammatory reactions in a man and suppresses the immune response in addition to its primary functions?

Cortisol
Thymosin
Thyrocalcitonin
Erythropoietin

Question 17 of 57

17. Question

Match the microbial products listed under Column I with the related microbes given under Column II; choose the appropriate option from the given choices

	Column – I		Column – II
A	Citric acid	p	Methanobacterium
B	Cyclosporin A	q	Monascus purpureus
C	Statin	r	Aspergillus niger
D	Gobar gas	s	Trichoderma polysporum
		t	Clostridium butylicum

A - r, B - s, C - q, D - p
A - t, B - q, C - s, D - r
A - q, B - s, C - t, D - r
A - r, B - s, C - q, D – t

Question 18 of 57

18. Question

Marchantia is considered as a heterothallic plant because it is _____

Heterogametic
Bisexual
Monoecious
Dioecious

Question 19 of 57

19. Question

Identify the set of characteristics related to plants belonging to family Fabaceae from the following

Actinomorphic flower, syncarpous ovary and marginal placentation
Persistent calyx, epipetalous stamens and leguminous fruit
Papilionaceous corolla, axile placentation and leguminous fruit
Vexillary aestivation of corolla, diadelphous stamens and monocarpellary, unilocular ovary

Question 20 of 57

20. Question

One of the following statements is incorrect with reference to biodiversity. Identify it

Biodiversity increases from higher altitudes to lower altitudes
Depletion in genetic diversity of crop plants is mainly due to the introduction of better varieties with high yield, disease resistance, etc
The richest reservoirs of animal and plant life (species richness) with few or no threatened species are called “biodiversity hotspots”
Biodiversity decreases from the equator to polar regions

Question 21 of 57

21. Question

In castor and maize plants, _____

Autogamy is prevented but not geitonogamy
Both autogamy and geitonogamy are prevented
Male and female flowers are borne by different plants
The anthers and stigma are placed at different positions to encourage cross pollination

Question 22 of 57

22. Question

In garden pea, round shape of seeds in dominant over wrinkled shape. A pea plant heterozygous for round shape of seed is selfed and 1600 seeds produced during the cross are subsequently germinated. How many seedlings would have the parental phenotype?

1600
800
400
1200

Question 23 of 57

23. Question

Which of the following event would occur in ‘Lac-operon’ of coli when the growth medium has high concentration of lactose?

The structural genes fail to produce polycistronic mRNA
The repressor protein binds to RNA polymerase and prevents translation
The repressor protein attaches to the promoter sequence and derepresses the operator
The inducer molecule binds to repressor protein and RNA polymerase binds to promoter sequence

Question 24 of 57

24. Question

The mature infective stages of malarial parasite which are transferred from mosquito to man are _____

Sporozoites
Merozoites
Trophozoites
Gametocytes

Question 25 of 57

25. Question

One of the following refers to Allen’s rule

If the stressful conditions are localized or remain only for a short duration, an organism either migrates or suspends itself
Mammals from colder climates have shorter ears and limbs to minimize heat loss
An organism can move from a stressful habitat to a more hospitable area and return when the stressful period is over
Low atmospheric pressure in higher altitudes results in altitude sickness

Question 26 of 57

26. Question

Identify the DNA segment which is not a palindromic sequence

- 5' GAATTC 3'
- 3' CTTAAG 5'
- 5' CCCGGG 3'
- 3' GGGCCC 5'
- 5' GGATCC 3'
- 3' GGTACC 5'
- 5' GCGGCCGC 3'
- 3' CGCCGGCG 5'

Question 27 of 57

27. Question

During somatic hybridization in plants, _____

Somaclones are produced in large numbers
The apical meristems are cultured to get virus-free plants
The cell walls and the middle lamella are digested before fusing the cells
Crop plants with higher levels of vitamins, proteins and minerals are hybridized

Question 28 of 57

28. Question

Statement A: The secretion of collaterial gland forms the egg case in cockroach

Statement B: The development in cockroach is hemimetabolous

Both the statements A and B are correct and B is the reason for A
Both the statements A and B are correct and B is not the reason for A
Statement A is correct and statement B is wrong
Statement B is correct and statement A is wrong

Question 29 of 57

29. Question

If a plant produces flowers when exposed only to alternating periods of 5 hours light and 3 hours dark in a 24 – hour cycle, then the plant should be a _____

Short day plant
Long day plant
Short-long day plant
Day neutral plant

Question 30 of 57

30. Question

If there was no carbon dioxide in the earth’s atmosphere, the temperature of the earth’s surface would be _____

Same as the present level
More than the present level
Less than the present level
Dependent on the oxygen content in the atmosphere

Question 31 of 57

31. Question

One of the following is incorrect about cancer cells

They exhibit the property of contact inhibition
They are metastatic
They exhibit mass proliferation
They are produced when cellular oncogenes of normal cells are activated

Question 32 of 57

32. Question

The centrosome duplicates during the _____

S – phase of cell cycle
G1 – phase of cell cycle
G2 – phase of cell cycle
Prophase of cell cycle

Question 33 of 57

33. Question

Match the items listed under Column I with those given under Column II; choose the appropriate option from the given choices

	Column – I		Column – II
A	Residual Volume (RV)	p	4000 ml – 4600 ml
B	Inspiratory Reserve Volume (IRV)	q	100 ml – 1200 ml
C	Vital Capacity (VC)	r	1000 ml – 1100 ml
D	Expiratory Reserve Volume (ERV)	s	3000 ml – 3500 ml
E	Inspiratory Capacity (IC)	t	2500 ml – 3000 ml

A - q , B - r , C - s , D - t , E - p
A - r , B - t , C - p , D - q , E - s
A - t , B - q , C - s , D - r , E - p
A - q , B - t , C - p , D - r , E - s

Question 34 of 57

34. Question

Which of the following statements is correct?

Elaioplasts store starch whereas aleuroplasts store proteins
Acrocentric chromosomes have only one arm
The core of cilium or flagellum is the basal body
Membranous extensions into the cytoplasm in cyanobacteria which contain pigments are called chromatophores

Question 35 of 57

35. Question

Sickle cell anaemia is caused due to the substitution of _____

Valine at 6th position of alpha globin chain by glutamic acid
Glutamic acid at the 6th position of beta globin chain by valine
Valine at the 6th position of beta globin chain by glutamine
Glycine at the 6th position of alpha globin chain by glutamic acid

Question 36 of 57

36. Question

Statement A: The primary transcript produced in eukaryotes is translated without undergoing any modification or processing

Statement B: The hnRNA in humans has exons and introns

Both the statements A and B are correct
Both the statements A and B are wrong
Statement B is correct and statement A is wrong
Statement A is correct and statement B is wrong

Question 37 of 57

37. Question

Knee joint is an example for _____

Ball and socket joint
Hinge joint
Pivot joint
Gliding joint

Question 38 of 57

38. Question

Carefully read the following reactions carried out by nitrogen fixing bacteria. Identify the statement about these equations which is not true

2NH₃+ 3O₂ → 2NO₂¯ + 2H⁺+ 2H₂O… (A)

2NO₂¯ + O₂ → 2NO₃¯ … (B)

Step (A) is carried out by Nitrosomonas or Nitrococcus
Step (B) is carried out by Nitrobacter
Both the steps (A) and (B) can be called nitrification
Both the steps occur only in photoautotrophs

Question 39 of 57

39. Question

Match the vegetative propagules listed under Column I with the plants given under Column II; choose the appropriate option from the given choices

	Column – I		Column – II
A	Rhizome	p	Agave
B	Offset	q	Bryophyllum
C	Sucker	r	Ginger
D	Leaf buds	s	Chrysanthemum
		t	Eichhornia

A - r, B - s, C - p, D - q
A - s, B - t, C - q, D - r
A - r, B - t, C - s, D - q
A - q, B - p, C - t, D – s

Question 40 of 57

40. Question

One of the following causes population explosion

Decrease in death rate, maternal mortality rate and infant mortality rate
Decrease in death rate and increase in maternal mortality rate
Decrease in infant mortality rate and increase in death rate
Decrease in infant mortality rate and decrease in the number of people in reproductive age

Question 41 of 57

41. Question

_____ are the most abundant proteins in the living world

Ribozyme of plants and collagen of animals
RuBisCo of plants and collagen of animals
PEPcase of plants and keratin of animals
Alcohol dehydrogenase of plants and melanin of animals

Question 42 of 57

42. Question

One of the chief reasons among the following for the depletion in the number of species making it endangered is _____

Greenhouse effect
Habitat destruction
Over-hunting and poaching
Competition and predation

Question 43 of 57

43. Question

In humans, what is the ratio of number of gametes produced from one male primary sex cell to the number of gametes produced from one female primary sex cell?

1: 1
1: 3
1: 4
4: 1

Question 44 of 57

44. Question

Identify the incorrect statement from the following

Pyramid of energy is mostly upright, but sometimes it may be inverted
Pyramids of number and biomass may be either upright or inverted
Pyramid of biomass in sea is generally inverted as the biomass of fish far exceeds that of phytoplanktons
Food chains are generally short with few trophic levels as only 10% of the energy is transferred to each trophic level from the lower trophic level

Question 45 of 57

45. Question

Match the organic compounds listed under Column I with the explanation given under Column II; choose the appropriate option from the given choices

	Column – I		Column – II
A	Phosphoenol pyruvate (PEP)	p	6 – carbon compound
B	Ribulose biphosphate (RuBP)	q	2 – carbon compound
C	Oxaloacetic acid (OAA)	r	4 – carbon compound
D	Acetyl co-enzyme – A	s	5 – carbon compound
		t	3 – carbon compound

A - r, B - s, C - t, D - p
A - q, B - r, C - s, D - t
A - t, B - s, C - r, D - q
A - t, B - p, C - q, D – r

Question 46 of 57

46. Question

Down’s syndrome is an example for _____

Aneuploidy of sex chromosome
Aneuploidy of autosome
Syndrome caused due to gene mutation
Loss of one sex – chromosome from the diploid set

Question 47 of 57

47. Question

The interaction between the organisms of one of the following pairs is an example for commensalism

Wasps and fig tree
Cuckoo and crow
Cattle or sheep and grass
Orchid and mango tree

Question 48 of 57

48. Question

The germ pores in the pollen grain are the regions _____

That can withstand high temperature and strong acids and alkalies
Through which sperms are released into the female gametophyte
Which are made up of lignin and suberin
Which lack sporopollenin

Question 49 of 57

49. Question

Heroin is _____

A cannabinoid
Diacetylmorphine (chemically)
Commonly called ‘coke’ or ‘crack’
Used to treat mental illnesses like depression and insomnia

Question 50 of 57

50. Question

Thorns of Bougainvillea and tendrils of Cucurbita are examples for _____

Convergent evolution
Divergent evolution
Adaptive radiation
Co-evolution

Question 51 of 57

51. Question

Some of the steps of DNA fingerprinting are given below. Identify the correct sequence from the options given

Electrophoresis of DNA fragments
Hybridization with DNA probe
Digestion of DNA by RENs
Autoradiography
Blotting of DNA fragments to nitrocellulose membrane

C – A – E – B – D
A – C – E – D – B
C – A – B – E – D
A – E – C – B – D

Question 52 of 57

52. Question

‘Flocks’ is _____

The primary sludge produced in sewage treatment
A type of biofortified food
A mesh-like structure formed by the association of bacteria and fungal filaments in sewage treatment
The effluent in primary treatment tank obtained during sewage treatment

Question 53 of 57

53. Question

ADA deficiency results in _____

Increased risk of infertility
Inability of the immune system to function normally
Chromosomal disorders
Decrease in the yield of crop plants

Question 54 of 57

54. Question

Parbhani kranti, a variety of bhindi (lady’s finger), is resistant to _____

Bacterial blight
Yellow mosaic virus
Black rot
Leaf curl

Question 55 of 57

55. Question

The globular head of myosin contains _____

Calcium ions in large quantities
Troponin
ATPase enzyme
ATP

Question 56 of 57

56. Question

EcoRI is _____

A restriction enzyme
A plasmid
Used to join two DNA figments
The abbreviation for bacterium Escherichia coli

Question 57 of 57

57. Question

‘Roquefort cheese’ is ripened by using a _____

Type of yeast
Fungus
Bacterium
Cyanobacteria

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