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Question Bank No: 4

1. The isolation of individual organelles from cell homogenates is achieved through (or pure fraction of cellular components can be obtained by )

a)		X-ray diffraction
b)		Chromatography
c)		Differential centrifugation
d)		Employment of different solvents

2. Hexokinase is associated with

a)		Isozyme
b)		Cempetitive inhibition
c)		Feed back inhibition
d)		Calvin's cycle

3. Benign tumours are enclosed in

a)		Connective tissue
b)		Nervous tissue
c)		Epithelial tissue
d)		Muscular tissue

4. The shape of the lens in the eye of mammals altered by

a)		Iris
b)		vitreous humour
c)		aqueous humour
d)		ciliary muscles

5. Which one does not produce any digestive enzymes

a)		Pancreas
b)		Liver
c)		Stomach
d)		Duodenum

6. Location of colour processing centere in human visual cortex has been found with the help of

a)		PET scanning
b)		NMR imaging
c)		CT scanning
d)		EEG

7. Auto analyser is used for

a)		Analysing heart defects
b)		Imaging various internal body parts
c)		Estimating requirement of surgical removal or correction
d)		Estimating quantity of various biochemicals in body fluids

8. B-cells produce antibodies in response to instruction received from

a)		Killer T-cells
b)		Suppressor T-cells
c)		Mast cells
d)		Helper cells

9. In amniocentesis

a)		The foetal cells are cultured and examined for heredity as well as metabolic defects
b)		The foetus is examined for metabolic defects
c)		The foetus is examined for sex
d)		The amniotic fluid is examined for metabolic defects

10. In Amoeba and Paramecium osmoregulation occurs through

a)		Psuedopodia
b)		Nucleus
c)		contractile vacuole
d)		General surface

11. Smallest enzyme is

a)		Catalase
b)		Peroxide
c)		Transferase
d)		Isomerase

12. M-chromosomes are

a)		Minute chromosome found in bryophytes and insects
b)		Small sized heterochromatic and genetically unnecessary extra chromosome
c)		NOR
d)		Secondary constriction

13. Chaperons are

a)		lichen
b)		alga
c)		bryophyte
d)		proteins involved in folding of polypeptide

14. Which of the phagocytes in human body is wrongly paired

a)		Dust cells - skin
b)		Histocytes - Connective tissue
c)		Kupffer cells - liver
d)		Reticular cells - spleen

15. Loamosomes are

a)		Trans membrane linkers
b)		In folds of plasma membrane in bacteria
c)		Triple unit membrane in follicular cells of ovary of bird
d)		In folds of plasma membrane in fungus

16. Red Alga commonly called as "sheep's wool" is

a)		Rhodymenia
b)		Porphyra
c)		Gellidium
d)		Fucus

17. Zooxanthellae is

a)		Pigment
b)		Dinoflagellate symbiotic in other protests
c)		Animal colour
d)		Animal parasite

18. Pollination in vallisnaria is by

a)		Wind
b)		Animals
c)		Insects
d)		Water

19. Photorespiration involves organelles like

a)		Mitochondria alone
b)		Peroxisomes alone
c)		Glyoxysomes alone
d)		Mitochondria peroxisomes and chloroplast

20. Development of fruit without fertilization is

a)		Parthenocarpy
b)		sporogamy
c)		Autogamy
d)		Parthenogenesis

21. Plants die when over fertilized because the fertilizer

a)		Damages the wall of delicate root hair
b)		Blocks absorption of nitrogen
c)		Cause dehydration of plant by exomosis
d)		Increase pH

22. Oncogene is another term for

a)		Promoter gene
b)		Structural gene
c)		Inducer gene
d)		Cancer causing

23. Transfer of DNA from one bacterium to another through cell to cell contact is called

a)		Conjugation
b)		Transformation
c)		Handuction
d)		Transcription

24. A short length of DNA molecule has 80 thymine and 80 guanine bases. The total number of nucleotides in the DNA fragment is

a)		160
b)		40
c)		80
d)		320

25. Tobacco contains

a)		Cocaine
b)		Morphine
c)		Codine
d)		Nicotine

26. Width of DNA molecule is

a)		34 $A^{o}$
b)		20 $A^{o}$
c)		15 $A^{o}$
d)		25 $A^{o}$

27. Skin colour inheritance in man is

a)		Monogenic
b)		Polygenic
c)		Pleotropic
d)		Multileallele

28. If blood group of parents are AB and O the possible blood group of children are

a)		O- group only
b)		O+ only
c)		AB group only
d)		A or B group

29. Three enzymes required to breakdown lactose into glucose are

a)		$β$ - galactosidase, permease and transacetylase
b)		$β$ - galactosidase, permease and pyrophosphorylase
c)		$β$ - galactosidase, isomerase, transacetylase
d)		$β$ - galactosidase, permease and hexokinase

30. The condon AUG species

a)		Phenylalanine
b)		Valine
c)		Tyrosine
d)		Methionine

31. Which of the following represents central dogoma in "molecular biology"

a)		DNA $\to$ RNA $\to$ Protein
b)		RNA $\to$ Protein $\to$ DNA
c)		RNA $\to$ DNA $\to$ protein
d)		DNA $\to$ protein $\to$ RNA

32. In maize grain the part which contains protein is

a)		Scutellum
b)		Endosperm
c)		Aleurone layer
d)		Radicle

33. One of the following acts as a "stress hormone"

a)		1AA
b)		GA3
c)		Zeatin
d)		Abscisic acid

34. The amount of ATP required for the synthesis of one molecule of glucose in C4 pathway

a)		18ATP
b)		30ATP
c)		12ATP
d)		24ATP

35. Polyarch exarch xylem is found in

a)		Dicot stem
b)		Monocot stem
c)		Dicot root
d)		Monocot root

36. From the below given items all except one belong to the class of lipid

a)		Butter
b)		Ghee
c)		Cheese
d)		Maltose

37. The branch which deals with scientific enquiry of life in outer space is

a)		Plaeo botany
b)		Exobiology
c)		Cytology
d)		Morphology

38. VAM are found important in the process of

a)		Phosphate nutrition
b)		N2 nutrition
c)		Dormancy break
d)		Decrease in yield

39. Enzyme which take part in the formation of peptide bonds between amino acid is

a)		Protease
b)		Nitrogenase
c)		Peptidyl transferase
d)		Peptidase

40. The proteind associated with nucleic acids are

a)		Albumins
b)		Globulins
c)		Lipoprotein
d)		Histones

41. The type of sugar in DNA are

a)		Triose
b)		Tetrose
c)		Pentose
d)		Hexose

42. Ribosomes in eukaryotic cells are

a)		70 s
b)		30s
c)		90s
d)		80 s

43. The energy transformation in the nervous system is

a)		Chemical to radiant
b)		Chemical to mechanical
c)		Chemical to electrical
d)		Chemical to osmotic

44. Which of the following is an edible fungi

a)		Lycoperdon
b)		Agaricus
c)		Penicillum
d)		Rhizopus

45. The total stem parasite among the following is

a)		Nepenthes
b)		Drosera
c)		Utricularia
d)		Cuscuta

46. Which of the following group produce spores but lacks vascular tissue

a)		Pteridophytes
b)		Gymnosperms
c)		Fungi
d)		Monocot

47. Bacteria used as biogas fermenters are

a)		Halophiles
b)		Methanogens
c)		Thermoacidophills
d)		Vibreo bacteria

48. During which stage od prophase I the crossing over takes place

a)		Leptotene
b)		Zygotene
c)		Diplotene
d)		Pachytene

49. Geometrid moth has the chromosome number

a)		224
b)		250
c)		1262
d)		46

50. Which of the following pair indicate wrong combination

a)		Mg-chlorophyll
b)		Fe - cytochrome
c)		P - DNA
d)		Na - protein