14620 + Mcqs in Biology McqOptions

1.	Assertion : Chlamydospores are thick-walled. Reason : Thin-walled chlamydospores are called gemmae.
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

2.	Synapsis is pairing of [MP PMT 2003]
A.	Any two chromosomes
B.	Non homologous chromosomes
C.	Acentric chromosomes
D.	Homologous chromosomes
Answer» E.

Discussion

3.	Read the assertion and reason carefully: Assertion : Orchis root resembles human hand. Reason : Orchis is an example of fasciculated fleshy roots.
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» D. If both the assertion and reason are false

Discussion

4.	Assertion : The uptake of DNA during transformation is an active, energy requiring process. Reason : Transformation occurs in only those bacteria, which possess the enzymatic machinery involved in the active uptake and recombination.
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» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

Discussion

5.	Assertion : Magnesium is important in photosynthesis and carbohydrate metabolism. Reason : \[M{{g}^{++}}\]is involved in the synthesis of nucleic acids.
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

6.	Fossil fuels have been formed by a [DPMT 1996]
A.	Conventional process
B.	Natural process
C.	Non-conventional process
D.	All the above
Answer» D. All the above

Discussion

7.	Assertion : Mendel was successful in his hybridization experiments. Reason : Garden pea proved ideal experimental material.
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

8.	Jumping genes are found in [MP PMT 2003]
A.	Eukaryotes
B.	Bacteriophage
C.	Bacteria
D.	Eukaryotes and prokaryotes
Answer» E.

Discussion

9.	Assertion : Trichomonas vaginalis causes infection only in women. Reason : Trichomonas buccalis lives in the buccal cavity.
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» F.

Discussion

10.	The rate of biogas production can be limited by
A.	Methane production
B.	Cellulose digestion
C.	Conversion of monomers to organic acids
D.	None of these
Answer» C. Conversion of monomers to organic acids

Discussion

11.	The pesticide useful in the control of aphids, caterpillars, plant bugs and borers is
A.	Aldrin
B.	DDT
C.	Endosulphan
D.	BHC
Answer» D. BHC

Discussion

12.	The recessive genes located on X-chromosome in humans are always [CBSE PMT 2004]
A.	Expressed in males
B.	Expressed in females
C.	Lethal
D.	Sub-lethal
Answer» B. Expressed in females

Discussion

13.	Noosphere relates to an environment dominated by
A.	Zooplanktons
B.	Nannoplanktons
C.	Man
D.	Carnivores
Answer» D. Carnivores

Discussion

14.	Succulent xerophytes are likely to be found in [CPMT 1983, 84, AFMC 1986, 90; MP PMT 1990]
A.	Tropical rain forest
B.	Deciduous forest
C.	Desert
D.	Tundra
Answer» D. Tundra

Discussion

15.	Systematic approach of naming enzymes has been recommended by the Commission on Enzymes of the
A.	International Union of Physiology
B.	International Union of Biochemistry
C.	International Union of Biotechnology
D.	International Union of Genetic Engineering
Answer» C. International Union of Biotechnology

Discussion

16.	Which are the two active ingredients in 'Flit'
A.	Malathion and Pyrethrin
B.	Carbofuran and Propoxur
C.	Malathion and Carbofuran
D.	Pyrethrin and Propoxur
Answer» B. Carbofuran and Propoxur

Discussion

17.	Biome with broad-leaved resinous fire resistant drought enduring plants is [AIIMS 1997]
A.	Savannah
B.	Steppes
C.	Chapparal
D.	Deciduous forest
Answer» D. Deciduous forest

Discussion

18.	Which of following group of mammals, the placenta is absent
A.	Prototheria
B.	Metatheria
C.	Eutheria
D.	Theria
Answer» B. Metatheria

Discussion

19.	First biosphere reserve was established in 1986 at
A.	Nilgiri
B.	Nanda Devi
C.	Little Rann of Kutch
D.	Sunderbans
Answer» B. Nanda Devi

Discussion

20.	Correlation between 'Kranz' anatomy and\[{{C}_{4}}\]path of\[C{{O}_{2}}\]assimilation was first established by
A.	Hill and Bendall
B.	Calvin
C.	Dowton and Treguna
D.	Arnold
Answer» D. Arnold

Discussion

21.	Read the assertion and reason carefully: Assertion : Flower of racemose inflorescence are pollinated by insects. Reason : In Racemose head infloresence, the florets are arranged in a centripetal fashion.
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

22.	Estuaries occur in [AMU 2001]
A.	Orissa and Tamilnadu
B.	Kerala and Tamilnadu
C.	Kerala and Orissa
D.	Kerala, Tamilnadu and Orissa
Answer» E.

Discussion

23.	Assertion : Blubber is present in some mammals. Reason : Bubbles are present in blubber.
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» D. If both the assertion and reason are false

Discussion

24.	When collagen fibres are removed from the areolar tissue
A.	Tissue becomes hard
B.	Tissue becomes loose and elastic
C.	Tissue becomes hard and inelastic
D.	Remains unchanged
Answer» C. Tissue becomes hard and inelastic

Discussion

25.	Assertion : Cedrus deodara yields highly-valued timber. Reason : Cedrus deodara is resistant to pathogen attack.
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» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

Discussion

26.	Which one of the following statements concerning the algae is wrong [CPMT 1987]
A.	Most algae are photosynthetic
B.	Algae can be classified according to their pigments
C.	All algae are filamentous
D.	Spirogyra does not produce zoospores
Answer» D. Spirogyra does not produce zoospores

Discussion

27.	Afforestation should be with [Haryana PMT 1994]
A.	Exotic species
B.	Indigenous species
C.	Bamboos
D.	Eucalyptus
Answer» C. Bamboos

Discussion

28.	Arbor vitae is composed of [AIIMS 1998]
A.	Grey matter
B.	Neurogleal cells
C.	White matter
D.	All of these
Answer» C. White matter

Discussion

29.	Assertion : Mosses are used as pollution indicators. Reason : They absorb metals.
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» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

Discussion

30.	Which of the following pair is used as condiments
A.	Ferula and Papaver
B.	Curcuma and Ferula
C.	Cinchona and Ferula
D.	Cinchona and Papaver
Answer» C. Cinchona and Ferula

Discussion

31.	Read the assertion and reason carefully: Assertion : Corm is a highly condensed and specialized underground stem. Reason : Corm has circular nodes.
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

32.	In whose milk percentage of lactose is highest?
A.	Cow
B.	She goat
C.	She buffalo
D.	Human mother
Answer» E.

Discussion

33.	Which one belongs to hydrolase group
A.	Amylase
B.	Transaminase
C.	Citrate synthetase
D.	Enolase
Answer» B. Transaminase

Discussion

34.	Last stage of gametophytic generation is [RPMT 1995]
A.	Gametes
B.	Zygote
C.	Spore mother cells
D.	Spores
Answer» B. Zygote

Discussion

35.	A legume having symbiotic association with two nitrogen fixing bacteria (Rhizobium and Aero rhizobium) is [MP PMT 1987]
A.	Crotalaria juncea
B.	Sesbania aculeata
C.	Sesbania rostrata
D.	Cyamopsis tetragonoloba
Answer» D. Cyamopsis tetragonoloba

Discussion

36.	Fermentation is [CPMT 1986; JIPMER 1988; AFMC 1999; MP PMT 2003]
A.	Anaerobic respiration
B.	Incomplete oxidation of carbohydrates
C.	Complete oxidation of carbohydrates
D.	None of the above
Answer» B. Incomplete oxidation of carbohydrates

Discussion

37.	Pod of Dolichos lablab is used as
A.	Vegetable
B.	As pulse
C.	Both and
D.	None of the above
Answer» B. As pulse

Discussion

38.	Read the assertion and reason carefully: Assertion : Higher plants have meristematic regions for indefinite growth. Reason : Higher plants have root and shoot apices. [AIIMS 1999]
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» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

Discussion

39.	Whether a nation can produce sportsmen who could successfully compete in Olympics is decided by their:
A.	health
B.	long life
C.	size of body
D.	right amount of food taken
Answer» B. long life

Discussion

40.	Antilope cervicapra/Black Buck is
A.	Vulnerable
B.	Endangered
C.	Critically endangered
D.	Extinct in the wild
Answer» B. Endangered

Discussion

41.	In mammals, few vertebrae join to form [EAMCET 1995]
A.	Humerus
B.	Femur
C.	Synsacrum
D.	Atlas
Answer» D. Atlas

Discussion

42.	Read the assertion and reason carefully: Assertion : In Bignonia, the terminal leaflets are modified into hooks. Reason : Leaflet of Bignonia is a climber.
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» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

Discussion

43.	Phytotron is [CPMT 2003]
A.	Fish culture
B.	Plant hormone
C.	Animal hormone
D.	None of these
Answer» C. Animal hormone

Discussion

44.	Pea nut (Arachis hypogea) belongs to the family [Pune CET 1998]
A.	Papilionaceae
B.	Poaceae
C.	Palmaceae
D.	Musaceae
Answer» B. Poaceae

Discussion

45.	Assertion : Allopolyploidy is developed between hybridisation of two species. Reason : Amphidiploids are also allopolyploids.
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

46.	Assertion : Total count of RBC comes out to be very low in polycythemia. Reason : Number of erythrocytes get reduced in the condition of polycythemia.
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» E. If the assertion is false but reason is true

Discussion

47.	Jumping genes are now known as [BHU 2005]
A.	Transposons
B.	Transversion
C.	Transduction
D.	Transformation
Answer» B. Transversion

Discussion

48.	Assertion : Thigh muscles can get tired but not the muscles of ventricle of heart. Reason : Muscles of thigh are voluntary whereas that of heart are involuntary muscles.
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

49.	Assertion : Polytene chromosomes are also called salivary chromosomes. Reason : They are present only in salivary glands of insects.
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» D. If both the assertion and reason are false

Discussion

50.	In a biosphere reserve, limited human activity is permitted in [AFMC 2002]
A.	Core zone
B.	Buffer zone
C.	Manipulation zone
D.	None of these
Answer» C. Manipulation zone

Discussion

Explore topic-wise MCQs in Testing Subject.

Assertion : Chlamydospores are thick-walled. Reason : Thin-walled chlamydospores are called gemmae.

Synapsis is pairing of [MP PMT 2003]

Read the assertion and reason carefully: Assertion : Orchis root resembles human hand. Reason : Orchis is an example of fasciculated fleshy roots.

Assertion : The uptake of DNA during transformation is an active, energy requiring process. Reason : Transformation occurs in only those bacteria, which possess the enzymatic machinery involved in the active uptake and recombination.

Assertion : Magnesium is important in photosynthesis and carbohydrate metabolism. Reason : \[M{{g}^{++}}\]is involved in the synthesis of nucleic acids.

Fossil fuels have been formed by a [DPMT 1996]

Assertion : Mendel was successful in his hybridization experiments. Reason : Garden pea proved ideal experimental material.

Jumping genes are found in [MP PMT 2003]

Assertion : Trichomonas vaginalis causes infection only in women. Reason : Trichomonas buccalis lives in the buccal cavity.

The rate of biogas production can be limited by

The pesticide useful in the control of aphids, caterpillars, plant bugs and borers is

The recessive genes located on X-chromosome in humans are always [CBSE PMT 2004]

Noosphere relates to an environment dominated by

Succulent xerophytes are likely to be found in [CPMT 1983, 84, AFMC 1986, 90; MP PMT 1990]

Systematic approach of naming enzymes has been recommended by the Commission on Enzymes of the

Which are the two active ingredients in 'Flit'

Biome with broad-leaved resinous fire resistant drought enduring plants is [AIIMS 1997]

Which of following group of mammals, the placenta is absent

First biosphere reserve was established in 1986 at

Correlation between 'Kranz' anatomy and\[{{C}_{4}}\]path of\[C{{O}_{2}}\]assimilation was first established by

Read the assertion and reason carefully: Assertion : Flower of racemose inflorescence are pollinated by insects. Reason : In Racemose head infloresence, the florets are arranged in a centripetal fashion.

Estuaries occur in [AMU 2001]

Assertion : Blubber is present in some mammals. Reason : Bubbles are present in blubber.

When collagen fibres are removed from the areolar tissue

Assertion : Cedrus deodara yields highly-valued timber. Reason : Cedrus deodara is resistant to pathogen attack.

Which one of the following statements concerning the algae is wrong [CPMT 1987]

Afforestation should be with [Haryana PMT 1994]

Arbor vitae is composed of [AIIMS 1998]

Assertion : Mosses are used as pollution indicators. Reason : They absorb metals.

Which of the following pair is used as condiments

Read the assertion and reason carefully: Assertion : Corm is a highly condensed and specialized underground stem. Reason : Corm has circular nodes.

In whose milk percentage of lactose is highest?

Which one belongs to hydrolase group

Last stage of gametophytic generation is [RPMT 1995]

A legume having symbiotic association with two nitrogen fixing bacteria (Rhizobium and Aero rhizobium) is [MP PMT 1987]

Fermentation is [CPMT 1986; JIPMER 1988; AFMC 1999; MP PMT 2003]

Pod of Dolichos lablab is used as

Read the assertion and reason carefully: Assertion : Higher plants have meristematic regions for indefinite growth. Reason : Higher plants have root and shoot apices. [AIIMS 1999]

Whether a nation can produce sportsmen who could successfully compete in Olympics is decided by their:

Antilope cervicapra/Black Buck is

In mammals, few vertebrae join to form [EAMCET 1995]

Read the assertion and reason carefully: Assertion : In Bignonia, the terminal leaflets are modified into hooks. Reason : Leaflet of Bignonia is a climber.

Phytotron is [CPMT 2003]

Pea nut (Arachis hypogea) belongs to the family [Pune CET 1998]

Assertion : Allopolyploidy is developed between hybridisation of two species. Reason : Amphidiploids are also allopolyploids.

Assertion : Total count of RBC comes out to be very low in polycythemia. Reason : Number of erythrocytes get reduced in the condition of polycythemia.

Jumping genes are now known as [BHU 2005]

Assertion : Thigh muscles can get tired but not the muscles of ventricle of heart. Reason : Muscles of thigh are voluntary whereas that of heart are involuntary muscles.

Assertion : Polytene chromosomes are also called salivary chromosomes. Reason : They are present only in salivary glands of insects.

In a biosphere reserve, limited human activity is permitted in [AFMC 2002]