Read the assertion and reason carefully: Assertion : The ovary forms fruit after fertilization. Reason : The ovary forms parthenocarpic fruits without fertilization.

If the assertion is true but the reason is false

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

If the assertion is true but the reason is false

If both the assertion and reason are false

If the assertion is false but reason is true

Sharbati sonora variety of wheat was obtained by:

crossing with wild varieties of wheat.

hybridisation between wild grasses.

irradiation of sonora-64 with gamma rays.

Sequence of humification and mineralisation is:

Humus \[\to \] Minerals \[\to \] Litter \[\to \] Duff

Dead organic matter \[\to \] Litter \[\to \] Duff \[\to \]Humus \[\to \] Minerals

Humus \[\to \] Minerals \[\to \] Litter \[\to \] Duff

Minerals \[\to \] Humus \[\to \] Litter \[\to \] Duff

Dead organic matter \[\to \] Duff \[\to \] Litter \[\to \]Minerals \[\to \] Humus

Aerenchyma is helpful in plants by [BVP 2003]

Giving mechanical strength to plants

Providing buoyancy in hydrophytes

Assertion : Bacterial photosynthesis occurs by utilizing wavelength longer than 700 nm. Reason : Here reaction centre is B-890. [AIIMS 2002]

If the assertion is true but the reason is false

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

If the assertion is true but the reason is false

If both the assertion and reason are false

If the assertion is false but reason is true

Passive absorption of water by root system is the result of:

Osmotic force in the shoot system.

Tension on the sap due to transpiration.

Osmotic force in the shoot system.

Force created in the cells of the root.

Increased respiratory activity in root cells.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Self medication may lead to drug addiction. Reason : Drug addicts face social stigma.

If assertion is true but reason is false.

If both assertion and reason are true and the reason is the correct explanation of the assertion.

If both assertion and reason are true but reason is not the correct explanation of the assertion.

If assertion is true but reason is false.

If the assertion and reason both are false.

If assertion is false but reason is true.

Assimilatory power refers to:

Generation of ATP and \[NADP{{H}_{2}}\]

In vitro fertilization is a technique that involves transfer of which one of the following into the fallopian tube?

Embryo only, upto 8-cell stage.

Either zygote or early embryo upto8-cell stage.

Dichlorophenyl dimethyl urea (DCMU):

Inhibits oxidative phosphorylation

When stomata close, which of the following events does not occur?

O.P. of the guard cells decreases.

Accumulation of \[{{O}_{2}}\] takes place.

Vessels differ from tracheids [CPMT 1982, 88]

In being derived from single cell

In having vertical rows of cells with cross walls dissolved

They help in the conduction of water

In mosses, vegetative reproduction takes place by:

fragmentation and budding in the secondary protonema.

The family containing mustard, and its main characters are: [AIIMS 2005]

Brassicaceae-Pentamerous flowers, many stamens, pentacarpellary gynoecium, capsule type fruit

Brassicaceae-Tetramerous flowers, six stamens, bicarpellary gynoecium, siliqua type fruit

Brassicaceae-Pentamerous flowers, many stamens, pentacarpellary gynoecium, capsule type fruit

Solanaceae-Pentamerous flowers, five stamens, bicarpellary gynoecium, berry type fruit

Poaceae-Trimerous flowers, three stamens, monocarpellary gynoecium, caryopsis type of fruit.

The characteristic trait of the plant body of bryophtyes is that:

plant body is equally differentiated to that of algae.

plant body is more differentiated than that of algae.

plant body is equally differentiated to that of algae.

plant body is less differentiated than that of algae.

plant body is not differentiated.

In humid climate, presence of spines in shrubs is [CPMT 1991]

To defend against mammal herbivory

To check seed predation by birds

14620 + Mcqs in Biology in NEET Page 5 McqOptions

201.	Haploid plants can be obtained by culturing:
A.	Young leaves
B.	Endosperm
C.	Pollen grains
D.	Root tips
Answer» D. Root tips

Discussion

202.	The process of removing stamens from the flower bud during hybridisation is called:
A.	Crossing
B.	Selfing
C.	Emasculation
D.	Capping
Answer» D. Capping

Discussion

203.	Dense evergreen vegetation of broad sclerophyllous leaves and shrubs with fire resistant resinons plants is known as:
A.	Chaparral vegetation
B.	Savannah vegetation
C.	Steppe grassland
D.	Tundra vegetation
Answer» B. Savannah vegetation

Discussion

204.	The shallow water zone around the edge of the lake is called:
A.	Littoral zone
B.	Limnetic zone
C.	Profundal zone
D.	Benthic zone
Answer» B. Limnetic zone

Discussion

205.	Genetically adapted local population of a species (that has a wide range of distribution) are called:
A.	Phenotypes
B.	Ecotype
C.	Sciophytes
D.	Mesophytes
Answer» C. Sciophytes

Discussion

206.	Read the assertion and reason carefully: Assertion : The ovary forms fruit after fertilization. Reason : The ovary forms parthenocarpic fruits without fertilization.
A.	If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B.	If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C.	If the assertion is true but the reason is false
D.	If both the assertion and reason are false
E.	If the assertion is false but reason is true
Answer» C. If the assertion is true but the reason is false

Discussion

207.	In crop plants, clonal selection is used in:
A.	Non-flowering species
B.	Low seed setting species
C.	Apomictic species
D.	All of the above
Answer» E.

Discussion

208.	Sharbati sonora variety of wheat was obtained by:
A.	X-ray treatment
B.	crossing with wild varieties of wheat.
C.	hybridisation between wild grasses.
D.	irradiation of sonora-64 with gamma rays.
Answer» E.

Discussion

209.	Identical twins are [AFMC 1986]
A.	Heterozygous
B.	Homozygous
C.	Monozygotic
D.	Dizygotic
Answer» D. Dizygotic

Discussion

210.	A group of cells alike in form, function and origin is called [CMC Vellore 1994; MP PMT 1999]
A.	Organ
B.	Organella
C.	Tissue
D.	None of these
Answer» D. None of these

Discussion

211.	Sequence of humification and mineralisation is:
A.	Dead organic matter \[\to \] Litter \[\to \] Duff \[\to \]Humus \[\to \] Minerals
B.	Humus \[\to \] Minerals \[\to \] Litter \[\to \] Duff
C.	Minerals \[\to \] Humus \[\to \] Litter \[\to \] Duff
D.	Dead organic matter \[\to \] Duff \[\to \] Litter \[\to \]Minerals \[\to \] Humus
Answer» B. Humus \[\to \] Minerals \[\to \] Litter \[\to \] Duff

Discussion

212.	Stem tendrils occur in [Orissa JEE 2000]
A.	Smilax
B.	Gloriosa
C.	Vitis
D.	Lathyrus
Answer» D. Lathyrus

Discussion

213.	Domestication of silk worm is called [CPMT 1986, 91; CBSE PMT 1992]
A.	Sericulture
B.	Pisciculture
C.	Apiculture
D.	Horticulture
Answer» B. Pisciculture

Discussion

214.	Increase in length of plant axis is by [CPMT 1977, 78, 79, 84]
A.	Apical meristem
B.	Lateral meristem
C.	Dermatogen
D.	Periblem
Answer» B. Lateral meristem

Discussion

215.	Aerenchyma is helpful in plants by [BVP 2003]
A.	Giving flexibility to plants
B.	Giving mechanical strength to plants
C.	Promoting photosynthesis
D.	Providing buoyancy in hydrophytes
Answer» E.

Discussion

216.	Assertion : Bacterial photosynthesis occurs by utilizing wavelength longer than 700 nm. Reason : Here reaction centre is B-890. [AIIMS 2002]
A.	If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B.	If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C.	If the assertion is true but the reason is false
D.	If both the assertion and reason are false
E.	If the assertion is false but reason is true
Answer» C. If the assertion is true but the reason is false

Discussion

217.	Which one is a hereditary trait [CPMT 1981]
A.	Night blindness
B.	Baldness
C.	Colour blindness
D.	Beri-beri
Answer» D. Beri-beri

Discussion

218.	Passive absorption of water by root system is the result of:
A.	Tension on the sap due to transpiration.
B.	Osmotic force in the shoot system.
C.	Force created in the cells of the root.
D.	Increased respiratory activity in root cells.
Answer» B. Osmotic force in the shoot system.

Discussion

219.	Maltose, lactose and soucrose are [BHU 2001]
A.	Disaccharides
B.	Trisaccharides
C.	Monosaccharides
D.	Polysaccharides
Answer» B. Trisaccharides

Discussion

220.	Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Self medication may lead to drug addiction. Reason : Drug addicts face social stigma.
A.	If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.	If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.	If assertion is true but reason is false.
D.	If the assertion and reason both are false.
E.	If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.

Discussion

221.	Assimilatory power refers to:
A.	Generation of ATP and \[NADP{{H}_{2}}\]
B.	Reduction of \[C{{O}_{2}}\]
C.	Splitting of water
D.	Disintegration of plastids
Answer» B. Reduction of \[C{{O}_{2}}\]

Discussion

222.	Which of the following is a genetic vector [BVP 2001]
A.	Phage
B.	Plasmid
C.	Mosquito
D.	None of these
Answer» C. Mosquito

Discussion

223.	Final product of HSK cycle is formed in:
A.	Mesophyll cells
B.	Bundle sheath cells
C.	Epidermal cells
D.	Guard cells
Answer» C. Epidermal cells

Discussion

224.	Peroxisomes, in plant cells, are involved in [Pune CET 1998; MP PMT 1998, 2004]
A.	Photooxidation
B.	Photorespiration
C.	Photophosphorylation
D.	Photolysis of water
Answer» C. Photophosphorylation

Discussion

225.	Ploidy of ovary, anther, egg, pollen, male gamete and zygote are respectively:
A.	2n, 2n, n, 2n, n, 2n
B.	2n, 2n, n, n, n, 2n
C.	2n, n, n, n, n, n
D.	2n, 2n, n, 2n, 2n, 2n
Answer» C. 2n, n, n, n, n, n

Discussion

226.	Oestrous cycle occurs in females of:
A.	Monkeys
B.	Cows
C.	Apes
D.	Humans
Answer» C. Apes

Discussion

227.	Which of the following is the matching pair of the deficient nutrient and the resulting disease in which the patient develops swollen lips, thick pigmented skin of hands and legs irritability? (BHU 2002)
A.	Iodine Goitre
B.	Niacin Pellagra
C.	Thiamine Beri-beri
D.	Protein Kwashiorkor
Answer» C. Thiamine Beri-beri

Discussion

228.	Which of the following is enucleate [Kerala CET 2002]
A.	Squamous epithelial cell
B.	Mature human erythrocyte
C.	Mature frog erythrocyte
D.	Human osteocyte
Answer» C. Mature frog erythrocyte

Discussion

229.	Progesterone pill helps in preventing pregnancy by not allowing:
A.	Ova formation
B.	Fertilisation
C.	Implantation
D.	None of these
Answer» B. Fertilisation

Discussion

230.	In vitro fertilization is a technique that involves transfer of which one of the following into the fallopian tube?
A.	Zygote only
B.	Embryo only, upto 8-cell stage.
C.	Either zygote or early embryo upto8-cell stage.
D.	Embryo of 32-cekk stage.
Answer» D. Embryo of 32-cekk stage.

Discussion

231.	Which is used for preparing alcohol [MP PMT 1988, 2001; Chd. CET 2000; MHCET 2004]
A.	Penicillium
B.	Lactobacillus
C.	Saccharomyces
D.	Acetobacter
Answer» D. Acetobacter

Discussion

232.	Dichlorophenyl dimethyl urea (DCMU):
A.	Inhibits PS-I
B.	Inhibits PS-II
C.	Destroy chloroplast
D.	Inhibits oxidative phosphorylation
Answer» C. Destroy chloroplast

Discussion

233.	Secondary meristems are derived from
A.	Apical meristem
B.	Intercalary meristem
C.	Lateral meristem
D.	Permanent tissues
Answer» E.

Discussion

234.	Unisexuality of flowers prevents:
A.	Geitonogamy but not xenogamy
B.	Autogamy and geitonogamy
C.	Autogamy but not geitonogamy
D.	Both geitonogamy and xenogamy
Answer» D. Both geitonogamy and xenogamy

Discussion

235.	Which type of association is found in between entomophilous flower and pollinating agent?
A.	Mutualism
B.	Commensalism
C.	Cooperation
D.	Co-evolution
Answer» B. Commensalism

Discussion

236.	'Sericulture' is native of
A.	Japan
B.	China
C.	India
D.	Korea
Answer» C. India

Discussion

237.	Match column-I with column-II and select the correct answer using the codes given below Column-I Column-II A. Herbarium I. Includes those specimens which can be easily classified on their observable characters. B. Botanical garden II. Preserved specimens on sheets become a store house for future use. C. Museum III. Generally set up in educational institutes. D. Zoological IV. Includes those animals which are identified based on their aggregate of characters. E. Key V. All animals provided similar conditions to their natural habitat. VI. Includes animals of related orders. VII. Includes collections of living plants for reference. VIII. It identifies animals and plants on the basis of their similarities and dissimilarities
A.	A-I B-II C-VIII D-V E-III
B.	A-III B-I C-IV D-II E-V
C.	A-II B-VII C-III D-V E-VIII
D.	A-II B-III C-VII D-I E-IV
Answer» D. A-II B-III C-VII D-I E-IV

Discussion

238.	When stomata close, which of the following events does not occur?
A.	Guard cells become flaccid.
B.	Sugar is converted to starch.
C.	O.P. of the guard cells decreases.
D.	Accumulation of \[{{O}_{2}}\] takes place.
Answer» E.

Discussion

239.	Sprain is caused due to stretching of [BHU 1985; AIIMS 1993]
A.	Muscle
B.	Ligament
C.	Tendon
D.	Nerve
Answer» C. Tendon

Discussion

240.	Vessels differ from tracheids [CPMT 1982, 88]
A.	In being derived from single cell
B.	In having vertical rows of cells with cross walls dissolved
C.	In being living
D.	They help in the conduction of water
Answer» C. In being living

Discussion

241.	In mosses, vegetative reproduction takes place by:
A.	fragmentation and budding in the secondary protonema.
B.	gemmae and tuber formation
C.	protonema and endospore
D.	gemmae formation
Answer» B. gemmae and tuber formation

Discussion

242.	The family containing mustard, and its main characters are: [AIIMS 2005]
A.	Brassicaceae-Tetramerous flowers, six stamens, bicarpellary gynoecium, siliqua type fruit
B.	Brassicaceae-Pentamerous flowers, many stamens, pentacarpellary gynoecium, capsule type fruit
C.	Solanaceae-Pentamerous flowers, five stamens, bicarpellary gynoecium, berry type fruit
D.	Poaceae-Trimerous flowers, three stamens, monocarpellary gynoecium, caryopsis type of fruit.
Answer» B. Brassicaceae-Pentamerous flowers, many stamens, pentacarpellary gynoecium, capsule type fruit

Discussion

243.	The characteristic trait of the plant body of bryophtyes is that:
A.	plant body is more differentiated than that of algae.
B.	plant body is equally differentiated to that of algae.
C.	plant body is less differentiated than that of algae.
D.	plant body is not differentiated.
Answer» B. plant body is equally differentiated to that of algae.

Discussion

244.	In humid climate, presence of spines in shrubs is [CPMT 1991]
A.	To reduce transpiration
B.	To defend against mammal herbivory
C.	To defend against wood cutters
D.	To check seed predation by birds
Answer» C. To defend against wood cutters

Discussion

245.	Nucleotides include
A.	RNA subunits
B.	ATP
C.	DNA subunits
D.	All of the above
Answer» E.

Discussion

246.	Botanical name of Radish is [APMEE 1994]
A.	Brassica nigra
B.	Brassica oleracea
C.	Raphanus sativus
D.	None of these
Answer» D. None of these

Discussion

247.	Role of molybdenum is [JIPMER 2002; AFMC 2002]
A.	Nitrogen fixation
B.	Carbon assimilation
C.	Flowering induction
D.	Chromosome contraction
Answer» B. Carbon assimilation

Discussion

248.	In an equilibrium population (at its carrying capacity), thousands of eggs and hundreds of tadpoles are produced by a single pair of frogs. About how many offsprings will live to reproduce the next year?
A.	0
B.	2
C.	10 to 20
D.	More than 100
Answer» C. 10 to 20

Discussion

249.	Deposition of callose is found in
A.	Sclerenchyma
B.	Tracheids
C.	Vessels
D.	Sieve tubes
Answer» E.

Discussion

250.	Chlorobium vesicle is present in
A.	Green bacteria
B.	Purple bacteria
C.	Colourless bacteria
D.	None of the above
Answer» B. Purple bacteria

Discussion

Explore topic-wise MCQs in NEET.

Haploid plants can be obtained by culturing:

The process of removing stamens from the flower bud during hybridisation is called:

Dense evergreen vegetation of broad sclerophyllous leaves and shrubs with fire resistant resinons plants is known as:

The shallow water zone around the edge of the lake is called:

Genetically adapted local population of a species (that has a wide range of distribution) are called:

Read the assertion and reason carefully: Assertion : The ovary forms fruit after fertilization. Reason : The ovary forms parthenocarpic fruits without fertilization.

In crop plants, clonal selection is used in:

Sharbati sonora variety of wheat was obtained by:

Identical twins are [AFMC 1986]

A group of cells alike in form, function and origin is called [CMC Vellore 1994; MP PMT 1999]

Sequence of humification and mineralisation is:

Stem tendrils occur in [Orissa JEE 2000]

Domestication of silk worm is called [CPMT 1986, 91; CBSE PMT 1992]

Increase in length of plant axis is by [CPMT 1977, 78, 79, 84]

Aerenchyma is helpful in plants by [BVP 2003]

Assertion : Bacterial photosynthesis occurs by utilizing wavelength longer than 700 nm. Reason : Here reaction centre is B-890. [AIIMS 2002]

Which one is a hereditary trait [CPMT 1981]

Passive absorption of water by root system is the result of:

Maltose, lactose and soucrose are [BHU 2001]

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Self medication may lead to drug addiction. Reason : Drug addicts face social stigma.

Assimilatory power refers to:

Which of the following is a genetic vector [BVP 2001]

Final product of HSK cycle is formed in:

Peroxisomes, in plant cells, are involved in [Pune CET 1998; MP PMT 1998, 2004]

Ploidy of ovary, anther, egg, pollen, male gamete and zygote are respectively:

Oestrous cycle occurs in females of:

Which of the following is the matching pair of the deficient nutrient and the resulting disease in which the patient develops swollen lips, thick pigmented skin of hands and legs irritability? (BHU 2002)

Which of the following is enucleate [Kerala CET 2002]

Progesterone pill helps in preventing pregnancy by not allowing:

In vitro fertilization is a technique that involves transfer of which one of the following into the fallopian tube?

Which is used for preparing alcohol [MP PMT 1988, 2001; Chd. CET 2000; MHCET 2004]

Dichlorophenyl dimethyl urea (DCMU):

Secondary meristems are derived from

Unisexuality of flowers prevents:

Which type of association is found in between entomophilous flower and pollinating agent?

'Sericulture' is native of

When stomata close, which of the following events does not occur?

Sprain is caused due to stretching of [BHU 1985; AIIMS 1993]

Vessels differ from tracheids [CPMT 1982, 88]

In mosses, vegetative reproduction takes place by:

The family containing mustard, and its main characters are: [AIIMS 2005]

The characteristic trait of the plant body of bryophtyes is that:

In humid climate, presence of spines in shrubs is [CPMT 1991]

Nucleotides include

Botanical name of Radish is [APMEE 1994]

Role of molybdenum is [JIPMER 2002; AFMC 2002]

In an equilibrium population (at its carrying capacity), thousands of eggs and hundreds of tadpoles are produced by a single pair of frogs. About how many offsprings will live to reproduce the next year?

Deposition of callose is found in

Chlorobium vesicle is present in