14620 + Mcqs in Biology Page 235 McqOptions

11701.	Largest physical and chemical molecules are [CBSE PMT 1996]
A.	Carbohydrates
B.	Lipids
C.	Proteins
D.	Nucleic acids
Answer» D. Nucleic acids

Discussion

11702.	Formation of auxin is checked by
A.	Photosynthesis
B.	Photo-oxidation
C.	Phototropism
D.	Darkness
Answer» C. Phototropism

Discussion

11703.	Bivalents in meiosis are [RPMT 2001]
A.	Tetrad
B.	Pairs of non-homologous chromosomes
C.	Pairs of several chromatids
D.	Pairs of homozygous chromosomes
Answer» B. Pairs of non-homologous chromosomes

Discussion

11704.	Assertion : The lichen is autotrophic in nature. Reason : One partner phycobiont photosynthesizes.
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

11705.	Mitosis results in
A.	Reduction in chromosome number
B.	Doubling of chromosome number
C.	Constant chromosome number
D.	Increase in cell volume
Answer» D. Increase in cell volume

Discussion

11706.	Natural genetic engineer is [Orissa JEE 2004]
A.	Bacillus subtilis
B.	Pseudomonas sp.
C.	Escherichia coli
D.	Agrobacterium tumefaciens
Answer» E.

Discussion

11707.	Lactic dehydrogenase (LDH) which catalyzes pyruvate to lactate is an example of [AMU 1989]
A.	Apoenzyme
B.	Antienzyme
C.	Isoenzyme
D.	Coenzyme
Answer» D. Coenzyme

Discussion

11708.	Telomerase is an enzyme which is a [CBSE PMT 2005]
A.	Repetitive DNA
B.	RNA
C.	Simple protein
D.	Ribonucleoprotein
Answer» E.

Discussion

11709.	Read the assertion and reason carefully: Assertion : Wheat is exstipulate. Reason : Grass is ligulate.
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

11710.	Read the assertion and reason carefully: Assertion : Nuclear endosperm is formed by subsequent nuclear division without wall formation. Reason : Coconut is an example of such endosperm, where the endosperm remains nuclear throughout the development of the fruit.
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

11711.	Which is not a monocot [BHU 2005]
A.	Rose
B.	Orchids
C.	Palms
D.	Banana
Answer» B. Orchids

Discussion

11712.	Which one of the following is a true terrestrial animal [BHU 1988]
A.	Frog
B.	Tortoise
C.	Salamander
D.	Toad
Answer» C. Salamander

Discussion

11713.	Most common biofuel, being used nowadays is
A.	Cellulose
B.	Charcoal
C.	Natural gas
D.	Fuel wood
Answer» D. Fuel wood

Discussion

11714.	Assertion : A gene may have several allelomorphs. Reason : Wild form can mutate in more than one ways.
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

11715.	\[{{C}_{4}}\]plants are also known as [MP PMT 1986]
A.	Hatch and Slack type
B.	Calvin type
C.	Calvin and Bassham type
D.	Emerson type
Answer» B. Calvin type

Discussion

11716.	Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Alcohol's are not digested in our body. Reason : Our digestive tract absorbs alcohol directly.
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» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

Discussion

11717.	BA is a
A.	Auxin
B.	Gibberellin
C.	Kinetin
D.	None of the above
Answer» B. Gibberellin

Discussion

11718.	MAB stands for [BHU 1985; CBSE PMT 1997]
A.	Man and biosphere
B.	Man antibiotics and bacteria
C.	Man and biotic community
D.	Mayer, Anderson and Bishby
Answer» B. Man antibiotics and bacteria

Discussion

11719.	Plant species on verge of extinction due to over-exploitation is [AIIMS 1997]
A.	Centella
B.	Podophyllum
C.	Gloriosa
D.	All the above
Answer» C. Gloriosa

Discussion

11720.	The fruits and leaves fall before maturity in absence of
A.	Auxin
B.	Gibberellin
C.	Cytokinin
D.	None of the above
Answer» B. Gibberellin

Discussion

11721.	Whale is included among mammals because it has a [CPMT 1979]
A.	Pair of lungs
B.	Pair of nostrils
C.	Four chambered heart
D.	Diaphragm between thorax and abdomen
Answer» E.

Discussion

11722.	Which animal is surinam toad RPMT 2000]
A.	Pipa
B.	Bufo
C.	Bombinator
D.	Alytes
Answer» B. Bufo

Discussion

11723.	Bony plates and scutes are found in addition to scales in [BHU 1985]
A.	Hag fish
B.	Eel
C.	Flying fish
D.	Sea horse
Answer» E.

Discussion

11724.	Assertion : Materials cannot be exchanged between epithelial cells. Reason : Blood vessels are absent in epithelial tissue.
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

11725.	Assertion : A shark can stay at a desired level in water without swimming. [AIIMS 1999] Reason : It has a buoyancy-regulating organ called as the swim bladder.
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

11726.	Which one part of the cell is non-living
A.	Cell wall
B.	Tonoplast
C.	Plasmalemma
D.	Sphaerosome
Answer» B. Tonoplast

Discussion

11727.	In an organism, if the normal diploid number of chromosomes is 8, how many chromatids are present in each daughter cell at the end of meiosis I [MP PMT 1993]
A.	2
B.	4
C.	8
D.	16
Answer» D. 16

Discussion

11728.	Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Tobacco smoking is the main causes of lung cancer. Reason : Tobacco smoke has a carcinogen called nicotine.
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

11729.	Assertion : Adenine and guanine are doublering bases. Reason : Adenine and guanine are pyrimidines.
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

11730.	Assertion : Chilling of blood decreases coagulation time. Reason : Cold depresses the action of coagulation promoting enzymes.
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

11731.	Which one has evergreen vegetation and drought adapted animals [Haryana PMT 2000]
A.	Chapparral
B.	Savannah
C.	Tundra
D.	Deciduous forest
Answer» B. Savannah

Discussion

11732.	Chipko movement is concerned with [JIPMER 1990]
A.	Plant conservation
B.	Project Tiger
C.	Plant breeding
D.	Animal breeding
Answer» B. Project Tiger

Discussion

11733.	Crossing over is advantageous because it brings about [MP PMT 1992]
A.	Variation
B.	Linkage
C.	Inbreeding
D.	Stability
Answer» B. Linkage

Discussion

11734.	Read the assertion and reason carefully: Assertion : Tepals may be free or fused. Reason : When sepals and petals are similar, they are called as tepals.
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

11735.	The organisms dwelling at the bottom of a lake are called [MP PMT 2000; AFMC 2001]
A.	Phytoplanktons
B.	Zooplanktons
C.	Nektons
D.	Benthos
Answer» E.

Discussion

11736.	Which step is required for better survival of human beings [MP PMT 2001]
A.	Conservation of wild life
B.	Afforestation
C.	Ban on mining
D.	Reduced utilization of resources
Answer» E.

Discussion

11737.	Assertion : Replication and transcription occur in the nucleus but translating occurs in the cytoplasm. [AIIMS 2005] Reason : mRNA is transferred from the nucleus into the cytoplasm where ribosomes and amino acids are available for protein synthesis.
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

11738.	Assertion : The strength of linkage will be more when the distance between two genes is greater. Reason : Crossing over will be relatively less frequent.
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

11739.	Assertion : Annelids are ureotelic. Reason : Only excretory product of annelids is uric acid.
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

11740.	Much work on biological control of insects has been done in
A.	North America
B.	Japan
C.	Russia
D.	U.K.
Answer» B. Japan

Discussion

11741.	Assertion : Crossing over is exchange of parts of chromosomes. Reason : It occurs prior to duplication of chromosomes.
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

11742.	Polytene or giant chromosomes are found in [KCET 1994; AFMC 1999]
A.	Salivary glands of man
B.	Salivary glands of woman
C.	Salivary glands of all animals
D.	Salivary glands of Drosophila
Answer» E.

Discussion

11743.	Flowering in pineapple is promoted by
A.	NAA
B.	\[G{{A}_{3}}\]
C.	Short days
D.	Cytokinin
Answer» B. \[G{{A}_{3}}\]

Discussion

11744.	Ongole cattle is the general utility breed of
A.	Orissa
B.	Andhra Pradesh
C.	Gujarat
D.	Bihar
Answer» C. Gujarat

Discussion

11745.	Salmon belongs to the group of [BHU 1998, AMU 2002]
A.	Bony fishes
B.	Cartilaginous fishes
C.	Cod fishes
D.	Trout fishes
Answer» E.

Discussion

11746.	In nature, which of the following animals has the power of killing the snakes
A.	Falcon
B.	Peacock
C.	Squirrel
D.	Pangolin
Answer» C. Squirrel

Discussion

11747.	A gene is said to be dominant, if [CBSE PMT 1992, 2002]
A.	It is never expressed in any condition
B.	It is expressed only in heterozygous condition
C.	It expresses its effect only in homozygous stage
D.	It is expressed both in homozygous and heterozygous conditions
Answer» E.

Discussion

11748.	Assertion : The stromal thylakoids are rich in both PS I and PS II. Reason : The granal membranes are rich in ATP synthetase.
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

11749.	Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Nicotine is an alkaloid found in tobacco. Reason : It has several uses.
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» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

Discussion

11750.	Chief distinguishing features of the mammals are [CPMT 1983]
A.	Hairy skin and ovipary
B.	Hairy skin and mammary glands
C.	Mammary glands and teeth
D.	Pinna and teeth
Answer» C. Mammary glands and teeth

Discussion

Explore topic-wise MCQs in NEET.

Largest physical and chemical molecules are [CBSE PMT 1996]

Formation of auxin is checked by

Bivalents in meiosis are [RPMT 2001]

Assertion : The lichen is autotrophic in nature. Reason : One partner phycobiont photosynthesizes.

Mitosis results in

Natural genetic engineer is [Orissa JEE 2004]

Lactic dehydrogenase (LDH) which catalyzes pyruvate to lactate is an example of [AMU 1989]

Telomerase is an enzyme which is a [CBSE PMT 2005]

Read the assertion and reason carefully: Assertion : Wheat is exstipulate. Reason : Grass is ligulate.

Read the assertion and reason carefully: Assertion : Nuclear endosperm is formed by subsequent nuclear division without wall formation. Reason : Coconut is an example of such endosperm, where the endosperm remains nuclear throughout the development of the fruit.

Which is not a monocot [BHU 2005]

Which one of the following is a true terrestrial animal [BHU 1988]

Most common biofuel, being used nowadays is

Assertion : A gene may have several allelomorphs. Reason : Wild form can mutate in more than one ways.

\[{{C}_{4}}\]plants are also known as [MP PMT 1986]

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Alcohol's are not digested in our body. Reason : Our digestive tract absorbs alcohol directly.

BA is a

MAB stands for [BHU 1985; CBSE PMT 1997]

Plant species on verge of extinction due to over-exploitation is [AIIMS 1997]

The fruits and leaves fall before maturity in absence of

Whale is included among mammals because it has a [CPMT 1979]

Which animal is surinam toad RPMT 2000]

Bony plates and scutes are found in addition to scales in [BHU 1985]

Assertion : Materials cannot be exchanged between epithelial cells. Reason : Blood vessels are absent in epithelial tissue.

Assertion : A shark can stay at a desired level in water without swimming. [AIIMS 1999] Reason : It has a buoyancy-regulating organ called as the swim bladder.

Which one part of the cell is non-living

In an organism, if the normal diploid number of chromosomes is 8, how many chromatids are present in each daughter cell at the end of meiosis I [MP PMT 1993]

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Tobacco smoking is the main causes of lung cancer. Reason : Tobacco smoke has a carcinogen called nicotine.

Assertion : Adenine and guanine are doublering bases. Reason : Adenine and guanine are pyrimidines.

Assertion : Chilling of blood decreases coagulation time. Reason : Cold depresses the action of coagulation promoting enzymes.

Which one has evergreen vegetation and drought adapted animals [Haryana PMT 2000]

Chipko movement is concerned with [JIPMER 1990]

Crossing over is advantageous because it brings about [MP PMT 1992]

Read the assertion and reason carefully: Assertion : Tepals may be free or fused. Reason : When sepals and petals are similar, they are called as tepals.

The organisms dwelling at the bottom of a lake are called [MP PMT 2000; AFMC 2001]

Which step is required for better survival of human beings [MP PMT 2001]

Assertion : Replication and transcription occur in the nucleus but translating occurs in the cytoplasm. [AIIMS 2005] Reason : mRNA is transferred from the nucleus into the cytoplasm where ribosomes and amino acids are available for protein synthesis.

Assertion : The strength of linkage will be more when the distance between two genes is greater. Reason : Crossing over will be relatively less frequent.

Assertion : Annelids are ureotelic. Reason : Only excretory product of annelids is uric acid.

Much work on biological control of insects has been done in

Assertion : Crossing over is exchange of parts of chromosomes. Reason : It occurs prior to duplication of chromosomes.

Polytene or giant chromosomes are found in [KCET 1994; AFMC 1999]

Flowering in pineapple is promoted by

Ongole cattle is the general utility breed of

Salmon belongs to the group of [BHU 1998, AMU 2002]

In nature, which of the following animals has the power of killing the snakes

A gene is said to be dominant, if [CBSE PMT 1992, 2002]

Assertion : The stromal thylakoids are rich in both PS I and PS II. Reason : The granal membranes are rich in ATP synthetase.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Nicotine is an alkaloid found in tobacco. Reason : It has several uses.

Chief distinguishing features of the mammals are [CPMT 1983]