👉 NEET Biology Examination
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Instruction
- Total 25 question
- Total Marks 100
- Each Question 4 marks
- Negative marking -1 for each wrong Question
NEET CONCEPT TEST -15 | BIOLOGY | STD-11 | EYE
26. A 22 year old student visits an opthalamologist . He has prob lem in reading books because he is not able to contract his
( a ) suspensory ligament ( b ) ciliary muscles
( c ) Iris ( d ) both ( a ) and ( b )
27. Cornea is covered externally by a thin transparent mem brane called
( a ) sclera ( b ) conjunctiva ( c ) aqueous humour ( d ) none of these
28. The yellowish pigmented spot present at the posterior pole of the human eye lateral to the blind spot is
( a ) crista ( b ) saccule ( c ) iris ( d ) meatus ( e ) macula lutea .
29. A person suffering from hypermetropia
( a ) can see far objects ( b ) can see nearer objects
( c ) cannot see in both the above cases ( d ) can see in both the above cases .
30. Mohan wears a special kind of a spectacle that produces an upright image on the retina , then he will
( a ) see everything upside down
( b ) see everything upright
( c ) Initially see everything upside down but regain normal upright vision after a month
( d ) initially see everything upright but after a few hours see everything upside down .
31. Photosensitive compound in human eye is made up of
( a ) opsin and retinol ( b ) transducing and retinene
( c ) guanosine and retinol ( d ) opsin and retinal .
32. Cornea transplant in humans is almost never rejected . This is because
( a ) it is composed of enucleated cells ( b ) it is a non - living layer
( c ) its cells are least penetrable by bacteria ( d ) it has no blood supply
33. Ora serrata is
( a ) gland present in oral cavity of frog ( b ) a part of retina of eye
( c ) present in utriculus of ear ( d ) oral cavity of protochordates .
34. Study the following differences .
Aqueous humour Vitreous humour
( i ) It is jelly - like substance . It is a watery fluid
( ii ) Present between cornea and lens Present in lens and retina
( iii ) It cannot be replaced It is continuously
drained off .
( iv ) Obstruction in flow may cause glaucoma It does not flow . .
How many of these are incorrect ?
( a ) One ( b ) Two ( c ) Three ( d ) Four
35. The correct sequence of inner layer of retina from inside to outside is
( a ) ganglion cells , bipolar neurons and photoreceptor cells
( b ) photoreceptor cells , bipolar neurons and ganglion cells
( c ) bipolar neurons , ganglion cells and photoreceptor cells
( d ) ganglion cells , photoreceptor cells and bipolar neurons
36. An aldehyde of vitamin A present in rhodopsin is
( a ) iodopsin ( b ) porpyrosin ( c ) cyanopsin ( d ) etinene .
37. Read following statements for visual purple and choose option which have all correct statements .
( i ) It contains derivative of vitamin A.
( ii ) It is present in cone cells .
(iii)It helps in colour vision
( iv ) It helps in twilight vision
( v ) It is made up of purplish - red protein
( a ) i, ii and iii ( b ) i, iv, and v ( c ) i , ii and iv ( d ) ii and iii
38. Read the following statements .
( i ) Suspensory ligament is tightly stretched .
( ii ) Humour exerts pressure on sclera .
( iii ) Lens allowed to shrink .
( iv ) Ciliary muscle contracts .
( v ) Tension in suspensory ligament is relaxed .
( vi ) Lens pulled thin .
Select the correct conditions regarding accommodation for neer object
( a ) ( i ) . ( ii ) and ( iii ) ( b ) ( i ) , ( iv ) and ( v )
( c ) ( i ) . ( v ) , ( vi ) ( d ) ( iv ) and ( vi )
39. Read the following statements and select the incorrect one .
( a ) Vitreous chamber is filled with a transparent gel called vitreous humour
( b ) Light rays in visible wavelength generates potential in rods and cones .
( c ) Rhodopsin pigment is composed of opsin and retinal .
( d ) Choroid contains pigmented cells that absorb light .
40. The part of eye that absorbs oxygen from the air is
( a ) sclera ( b ) cornea ( c ) iris ( d ) choroid
41. Aqueous chamber and vitreous chamber are separated by
( a ) Iris ( b ) pupil ( c ) lens ( d ) cornea .
42. The layer of eyeball containing many blood vessels and looks bluish in colour is
( a ) cornea ( b ) sclera ( c ) choroid ( d ) pupil .
43. The aperture surrounded by the Iris is called
( a ) pupil ( b ) retina ( c ) cornea ( d ) sclera .
44. Read the following statements and select the correct option StatementA : Nocturnal animals are able to see in the dark .
Statement B : Retina of eye of the nocturnal animals bears
mainly rod cells as the photoreceptors ..
( a ) Both statements A and B are correct and B is the correct explanation of A.
( b ) Both statements A and B are correct but B is not the correct explanation of A.
( c ) Statement A is correct but B is incorrect .
( d ) Both statements A and B are incorrect .
45. Among the following abnormalities select the one that leads to blindness .
( a ) Glaucoma ( b ) Astigmatism ( c ) Presbyopia ( d ) Myopia
46. Which of the following is not a part of vascular coat of eye wall ?
( a ) Choroid ( b ) Ciliary body ( C ) Iris ( d ) Retina
47. The origin of smooth muscle found in pupil is
( a ) ectodermal ( b ) endodermal
( c ) mesodermal ( d ) both ( b ) and ( c )
48. The external surface of the retina is in contact with A. and the internal surface is with B
A B
( a ) Choroid vitreous humour
( b ) Vitreous humour choroid
( c ) Sclera aqueous humour
( d ) Aqueous humour sclera
49. Good vision depends on adequate intake of carotene rich food . Select the best option from the following statements .
( i ) Vitamin A derivatives are formed from carotene .
( ii ) The photopigments are embedded in the membrane discs the inner segment .
( iii ) Retinal is a derivative of vitamin A.
( iv ) Retinal is a light absorbing part of all the visual photopigments .
( a ) ( i ) . ( iii ) and ( iv ) ( b ) ( i ) and ( iii )
( c ) ( ii ) , ( iii ) and ( iv ) ( d ) ( i ) and ( ii )
50. A bactericidal protein found in tears is
( a ) photopsin ( b ) retinal ( c ) scotopsin ( d ) lysozyme .
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ANSWER KEY
25. ( d ) 26. ( d ) 27. ( b ) 28. ( e ) 29. ( a ) 30. ( a ) 31. ( d ) 32. ( d ) 33. ( b ) 34. ( b ) 35. ( a ) 36. ( d ) 37. ( b ) 38. ( b ) 39. ( d ) 40. ( b ) 41. ( c ) 42. ( c ) 43. ( a ) 44. ( a ) 45. ( a ) 46. ( d ) 47. ( a ) 48. ( a ) 49. ( b ) 50. ( d )
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