14620 + Mcqs in Biology Page 193 McqOptions

9601.	In man sometime during gametogenesis sex chromosomes are not separated themselves on account of which chromosome number becomes 45, 47 or 48. In this condition which of the following genotype and phenotype is correct
A.	22 pairs + XXY males
B.	22 pairs + XX females
C.	22 pairs + XXXY females
D.	22 + Y females
Answer» B. 22 pairs + XX females

Discussion

9602.	The virus of deoxyvira (sub-phylum) contains
A.	mRNA
B.	tRNA
C.	DNA
D.	rRNA
Answer» D. rRNA

Discussion

9603.	When secondary growth in thickness is initiated in a dicot root, which of the following happens first
A.	Anticlinal divisions take place so that the cambium becomes circular
B.	Cambial initial between xylem and phloem divide
C.	Parenchymatous cells between xylem and phloem become meristematic
D.	?Pericycle strands? outside the primary xylem divide
Answer» D. ?Pericycle strands? outside the primary xylem divide

Discussion

9604.	A normal woman whose father was albino marries a man who is albino. What proportion of normal and albino can be expected among their offsprings [CBSE PMT 1994]
A.	1 normal : 1 albino
B.	All albino
C.	2 normal : 1 albino
D.	All normal
Answer» B. All albino

Discussion

9605.	To show host specificity is a
A.	Living character of virus
B.	Non-living character of virus
C.	Intermediate between (a) and (b)
D.	None of these
Answer» B. Non-living character of virus

Discussion

9606.	Trees at sea do not have annual rings because [BHU 1992]
A.	Soil is sandy
B.	There is climatic variation
C.	There is no marked climatic variation
D.	There is enough moisture in the atmosphere
Answer» D. There is enough moisture in the atmosphere

Discussion

9607.	Apical growth of the lower vascular plants takes place by an apical cell. This cell is generally pyramidal. Though four-sided in shape, it is often referred to as three-sided cell because
A.	In a L.S. it appears as three-sided cell
B.	In a T.S. it appears as three-sided cell
C.	Earlier it was wrongly stated as three-sided cell and the terminology continued
D.	It form new cells only from three sides
Answer» C. Earlier it was wrongly stated as three-sided cell and the terminology continued

Discussion

9608.	Knowing that albinism is determined by a recessive gene in man; presence of albinism in children born to a couple proves that [AIIMS 1992]
A.	Both the father and the mother are heterozygous for albinism
B.	The father is homozygous normal but the mother is heterozygous or vice versa
C.	The father is homozygous for albinism but the mother is heterozygous or vice versa
D.	[a] and [c] are correct
Answer» E.

Discussion

9609.	Viroids have [AIEEE Pharmacy 2004; MHCET 2001]
A.	Double stranded RNA encolsed by protein coat
B.	Double stranded DNA encolsed by protein coat
C.	Single stranded DNA not encolsed by protein coat
D.	Single stranded RNA not encolosed by protein coat
Answer» E.

Discussion

9610.	Considering the root apex of monocotyledons, there are three groups of initials
A.	The terminal ones form the dermatogen and the cap, the median forms the periblem and the innermost ones form the plerome
B.	The terminal ones form the cap, the median ones form the dermatogen and the innermost ones form the periblem and plerome
C.	The terminal ones form the cap, the median ones form the dermatogen and periblem and the innermost ones form the plerome
D.	The terminal ones form the cap and the dermatogen, the median ones are non- functional and the innermost ones form the periblem and plerome
Answer» D. The terminal ones form the cap and the dermatogen, the median ones are non- functional and the innermost ones form the periblem and plerome

Discussion

9611.	In order to determine whether variations of a character in a population were genetically controlled, the most appropriate procedure will be to [AIIMS 1983]
A.	Count chromosomes and find out the variations in number in the population
B.	Examine DNA and see if the population shows any variation
C.	Measure the variations and see if they are continuous or discontinuous
D.	Cross individuals of both extremes and see if the offsprings and parents show the same range of variations
Answer» E.

Discussion

9612.	Which of the following statement its incorrect [AMU 2003]
A.	Life processes are consequences of reactions that in an organims
B.	Living organisms are made of inorganic and organic compounds
C.	Life comes form pre-existing life
D.	Genes are not responsible for the stability or change ability of species
Answer» E.

Discussion

9613.	Cockroach and earthworm have common type of [Pb. PMT 2004]
A.	Heart
B.	Nerve cord
C.	Nephridia
D.	Spermathecae
Answer» E.

Discussion

9614.	Arrangement of DNA has the triplet base sequence AAC GAC AGC GGC ACA AAA. Due to mutation, the first base only got deleted. Then the likely effect of this on the coding of the DNA segment is that [AIIMS 1980]
A.	The first amino acid will be different and all others will be like the earlier polypeptide
B.	The polypeptide will have one amino acid less
C.	There will be a complete change in the types and sequence of amino acid
D.	There will be no change in the polypeptide chain formed
Answer» C. There will be a complete change in the types and sequence of amino acid

Discussion

9615.	When spontaneous process occurs then free energy of a system [DPMT 2003]
A.	Decreases
B.	Increases
C.	Remains same
D.	Either can decreases or increase
Answer» B. Increases

Discussion

9616.	If there is more than one tunica layer in a stem apex, which among the following is most likely to happen [AIIMS 1985; EAMCET 1985]
A.	All the layers will develop into epidermal cells
B.	Only the outer layer will develop into epidermal cells
C.	All the layers will develop into cortex
D.	Inner layer develops into cortex
Answer» C. All the layers will develop into cortex

Discussion

9617.	A boy is colour blind, in his two sisters one is colour blind and one is carrier (normal). Then who is colour blind in his family [CPMT 1994]
A.	Father
B.	His grandfather and mother
C.	Mother
D.	His grand father
Answer» B. His grandfather and mother

Discussion

9618.	For a successful graft, the adhesion between stock and scion is a must. Which one of the following is the earliest event towards a good graft [CBSE PMT 1990]
A.	Production of plasmodesmata in the cells at the interface of stock and scion
B.	Coordinated differentiation of vascular tissue between the stock and scion
C.	Regeneration of cortex and epidermis over the union of stock and scion
D.	Production of callus tissue between the cells of stock and scion
Answer» E.

Discussion

9619.	Phylum annelida resembles mollusca in embryonic features because both have [MP PMT 1999]
A.	Spiral cleavage and mesoderm formation
B.	Identical conspicuous segmentation in body, muscles and nervous system
C.	Meroblastic cleavage and ectoderm formation
D.	Special type of mouth parts
Answer» B. Identical conspicuous segmentation in body, muscles and nervous system

Discussion

9620.	The three natural processes that form the basis for evolution are
A.	Fossils, natural selection and adaptation
B.	Mutation, genetic variation and adaptation
C.	Adaptation, natural selection and inheritance
D.	Predation, genetic variation and natural selection
Answer» C. Adaptation, natural selection and inheritance

Discussion

9621.	The layer which separates velamen (A spongy tissue in epiphytic roots of some orchids for absorption of atmospheric moisture) from cortex is called
A.	Epidermis
B.	Epiblema
C.	Exodermis
D.	Endodermis
Answer» D. Endodermis

Discussion

9622.	Chloroplast contains maximum quantity of [BHU 1981; BCECE 2005]
A.	Pyruvic carboxylase
B.	Hexokinase
C.	RuDP carboxylase
D.	None of the above
Answer» D. None of the above

Discussion

9623.	In Hydra, both pseudopodia and flagella occur in [CPMT 1986, 88]
A.	Nutritive cells
B.	Epithelio-muscular cells
C.	Sensory cells
D.	Gland cells
Answer» B. Epithelio-muscular cells

Discussion

9624.	Cofactor for alcohol dehydrogenase is
A.	\[{{K}^{+}}\]
B.	\[F{{e}^{++}}\]
C.	\[Z{{n}^{++}}\]
D.	\[N{{a}^{+}}\]
Answer» D. \[N{{a}^{+}}\]

Discussion

9625.	When the sperms of Funaria and Pteris are put together near the archegonia of Pteris, only the sperms of Pteris readily enter the archegonia and reach the egg. The reason being that [CBSE PMT 1989, 94]
A.	Sperms of Funaria are killed when mixed with sperms of Pteris
B.	Archegonia of Pteris secrete a substance with repels sperms of Funaria
C.	Archegonia of Pteris secrete a chemical substance which attracts sperms of Pteris chemotactically
D.	Sperms of Funaria are less motile
Answer» D. Sperms of Funaria are less motile

Discussion

9626.	Asci are formed in [DPMT 1992]
A.	Ascobolus
B.	Saccharomyces
C.	Penicillium
D.	All the above
Answer» E.

Discussion

9627.	Contractile vacuole of Amoeba placed in salt water will [AFMC 1985]
A.	Burst
B.	Disappear
C.	Enlarge
D.	Multiply
Answer» C. Enlarge

Discussion

9628.	Stratum germinativum is an example of which kind of epithelium [CBSE PMT 1997]
A.	Cuboidal
B.	Ciliated
C.	Columnar
D.	Squamous
Answer» D. Squamous

Discussion

9629.	Pasturella pestis measures ...... in length
A.	\[0.1\] to \[0.2\mu \]
B.	\[1\] to \[2\mu \]
C.	\[0.5\]to \[0.8\mu \]
D.	\[2\] to \[2.5\mu \]
Answer» C. \[0.5\]to \[0.8\mu \]

Discussion

9630.	In frog, pancreas produces [CBSE PMT 1991]
A.	Two digestive enzymes, one hormone
B.	Three digestive enzymes, one hormone
C.	Three digestive enzymes, two hormones
D.	Three digestive enzymes, three hormones
Answer» C. Three digestive enzymes, two hormones

Discussion

9631.	In an organism, pink spot is a sex-linked recessive trait and black hair is dominant to white. If a pink spotted black heterozygous female is mated to a white male which is not spotted, the phenotypic ratio of the offspring would be [JIPMER 1994]
A.	1/4 spotted black; 1/4 pink spotted white; 1/4 unspotted black; 1/4 unspotted white
B.	1/2 pink spotted black; 1/2 pink spotted white
C.	3/4 pink spotted black; 1/4 pink spotted white
D.	3/4 unspotted black ; 1/4 pink spotted white
Answer» B. 1/2 pink spotted black; 1/2 pink spotted white

Discussion

9632.	Sympatric speciation is also known as
A.	Polyploidy
B.	Hybridization
C.	Allopatric species
D.	Isolation
Answer» C. Allopatric species

Discussion

9633.	The quiescent centre in root meristem serves as a [AIIMS 2003]
A.	Site for storage of food, which is utilized during maturation
B.	Reservoir of growth hormones
C.	Reserve for replenishment of damaged cells of the meristem
D.	Region for absorption of water
Answer» D. Region for absorption of water

Discussion

9634.	In bioluminesence storage, energy changes into [AFMC 2002]
A.	Light energy
B.	Radiant energy
C.	Chemical energy
D.	Mechanical energy
Answer» B. Radiant energy

Discussion

9635.	A child's blood group is 'O'. The parents blood groups cannot be [CBSE PMT 1994; Kerala PMT 2005]
A.	AB and O
B.	B and O
C.	A and B
D.	A and A
Answer» B. B and O

Discussion

9636.	The bond formed between the first phosphate group and adenosine in ATP is [KCET 2001]
A.	Phosphoester bond
B.	Adenophosphate bond
C.	Nitrophosphate bond
D.	Phosphoanhydride bond
Answer» C. Nitrophosphate bond

Discussion

9637.	In woody dicotyledons, the arrangement of vessels is either diffuse porous or ring porous. Based on the these data, which one of the following statements is correct ? [BHU 1994]
A.	Ring porous vessels are specialised and are used for conducting more water for a shorter period only, when tyloses occur early in the vessels
B.	Although diffuse porous vessels are not so specialized as ring porous vessels, they conduct more water at all periods and through new xylem vessels added gradually during development
C.	Diffuse porous vessels carry more water and also faster because of a greater number of small vessels having greater capillary force
D.	Ring porous vessels conduct more water as they are formed early during development, when the need for water is great
Answer» E.

Discussion

9638.	Body cavity surrounding alimentary canal but it is not lined by cellular layer in which of the following [BHU 2003]
A.	Nematodes
B.	Platyhelminthes
C.	Annelids
D.	Echinoderms
Answer» B. Platyhelminthes

Discussion

9639.	In man, brown eyes are dominant over blue and dark hair dominant over red hair . A man with brown eyes and red hair marries a woman with blue eyes and dark hair. They got two children; one resembling the man, the other the woman. The genotypes of the man and woman were
A.	BBdd, bbDD
B.	Bbdd, bbDd
C.	BBdd, bbDd
D.	Bbdd, bbDD
Answer» C. BBdd, bbDd

Discussion

9640.	Cells acquire and use energy to synthesize, store and degrade and eliminate substance through chemical reactions called
A.	Metabolism
B.	Homeostasis
C.	Metastasis
D.	Respiration
Answer» B. Homeostasis

Discussion

9641.	Both from phyllogenetic and ontogenetic point of view, which tissue is regarded as most primitive
A.	Parenchyma
B.	Sclerenchyma
C.	Collenchyma
D.	Sclereids
Answer» B. Sclerenchyma

Discussion

9642.	Most important criteria used for the present day classification of living organisms is based on
A.	Presence and absence of notochord
B.	Resemblances in external features
C.	Breeding habits
D.	Anatomical and physiological characteristics
Answer» E.

Discussion

9643.	Organisms which obtain energy by the oxidation of reduced inorganic compounds are called [CBSE PMT 2002]
A.	Saprozoic
B.	Chemoautotrophs
C.	Photoautotrophs
D.	Coproheterotroph
Answer» C. Photoautotrophs

Discussion

9644.	Bicarpellary syncarpous gynoecium, parietal placentation, tetradynamous stamens and siliqua fruit are characteristic features of family [AIIMS 1984; CPMT 1984, 98; DPMT 1986; MP PMT 1986; CBSE PMT 1992; APMEE 1993; RPMT 1994, 95]
A.	Cucurbitaceae
B.	Cruciferae
C.	Compositae
D.	Solanaceae
Answer» C. Compositae

Discussion

9645.	The main difference between Gymnophiona (Apoda) and Urodela is that Urodela [MP PMT 1986]
A.	Have two auricles and one ventricle
B.	Have smooth moist skin
C.	Have a cloaca
D.	Respire by lungs in the adult stage
Answer» C. Have a cloaca

Discussion

9646.	When whole blood is stored with an anticoagulant at \[4{}^\circ C\], the \[{{K}^{+}}\]ions move out from the RBC into the plasma. The most likely reasons for this is that [AIIMS 1982; DPMT 1992]
A.	RBC haemolyses and hence leakage of \[{{K}^{+}}\]ions
B.	\[{{K}^{+}}\] ions become more mobile at\[4{}^\circ C\]
C.	Active transport ceases resulting in ionic equilibrium
D.	The anticoagulant attracts the \[{{K}^{+}}\]ions into the plasma
Answer» C. Active transport ceases resulting in ionic equilibrium

Discussion

9647.	A closed system is one which
A.	Continuously exchange matter and energy with the surrounding
B.	Cannot exchange matter and energy with the surrounding
C.	Can exchange energy but not matter with the surrounding
D.	None of these
Answer» D. None of these

Discussion

9648.	Tricarpellary axile placentation is characteristic of [DPMT 1978, 87]
A.	Solanaceae
B.	Malvaceae
C.	Liliaceae
D.	Cruciferae
Answer» D. Cruciferae

Discussion

9649.	In a medico-legal case of accidental interchange between two babies in a hospital, the baby of blood group A could not be rightly given to a people [MP PMT 1990]
A.	With both husband and wife of group O
B.	Husband of group O and wife of group A
C.	Husband of group A and wife of group O
D.	Both husband and wife of group A
Answer» B. Husband of group O and wife of group A

Discussion

9650.	In amphibians the heart is
A.	Venous
B.	With double circulation
C.	With open circulation
D.	With arterial and venous circulation
Answer» E.

Discussion

Explore topic-wise MCQs in NEET.

In man sometime during gametogenesis sex chromosomes are not separated themselves on account of which chromosome number becomes 45, 47 or 48. In this condition which of the following genotype and phenotype is correct

The virus of deoxyvira (sub-phylum) contains

When secondary growth in thickness is initiated in a dicot root, which of the following happens first

A normal woman whose father was albino marries a man who is albino. What proportion of normal and albino can be expected among their offsprings [CBSE PMT 1994]

To show host specificity is a

Trees at sea do not have annual rings because [BHU 1992]

Apical growth of the lower vascular plants takes place by an apical cell. This cell is generally pyramidal. Though four-sided in shape, it is often referred to as three-sided cell because

Knowing that albinism is determined by a recessive gene in man; presence of albinism in children born to a couple proves that [AIIMS 1992]

Viroids have [AIEEE Pharmacy 2004; MHCET 2001]

Considering the root apex of monocotyledons, there are three groups of initials

In order to determine whether variations of a character in a population were genetically controlled, the most appropriate procedure will be to [AIIMS 1983]

Which of the following statement its incorrect [AMU 2003]

Cockroach and earthworm have common type of [Pb. PMT 2004]

Arrangement of DNA has the triplet base sequence AAC GAC AGC GGC ACA AAA. Due to mutation, the first base only got deleted. Then the likely effect of this on the coding of the DNA segment is that [AIIMS 1980]

When spontaneous process occurs then free energy of a system [DPMT 2003]

If there is more than one tunica layer in a stem apex, which among the following is most likely to happen [AIIMS 1985; EAMCET 1985]

A boy is colour blind, in his two sisters one is colour blind and one is carrier (normal). Then who is colour blind in his family [CPMT 1994]

For a successful graft, the adhesion between stock and scion is a must. Which one of the following is the earliest event towards a good graft [CBSE PMT 1990]

Phylum annelida resembles mollusca in embryonic features because both have [MP PMT 1999]

The three natural processes that form the basis for evolution are

The layer which separates velamen (A spongy tissue in epiphytic roots of some orchids for absorption of atmospheric moisture) from cortex is called

Chloroplast contains maximum quantity of [BHU 1981; BCECE 2005]

In Hydra, both pseudopodia and flagella occur in [CPMT 1986, 88]

Cofactor for alcohol dehydrogenase is

When the sperms of Funaria and Pteris are put together near the archegonia of Pteris, only the sperms of Pteris readily enter the archegonia and reach the egg. The reason being that [CBSE PMT 1989, 94]

Asci are formed in [DPMT 1992]

Contractile vacuole of Amoeba placed in salt water will [AFMC 1985]

Stratum germinativum is an example of which kind of epithelium [CBSE PMT 1997]

Pasturella pestis measures ...... in length

In frog, pancreas produces [CBSE PMT 1991]

In an organism, pink spot is a sex-linked recessive trait and black hair is dominant to white. If a pink spotted black heterozygous female is mated to a white male which is not spotted, the phenotypic ratio of the offspring would be [JIPMER 1994]

Sympatric speciation is also known as

The quiescent centre in root meristem serves as a [AIIMS 2003]

In bioluminesence storage, energy changes into [AFMC 2002]

A child's blood group is 'O'. The parents blood groups cannot be [CBSE PMT 1994; Kerala PMT 2005]

The bond formed between the first phosphate group and adenosine in ATP is [KCET 2001]

In woody dicotyledons, the arrangement of vessels is either diffuse porous or ring porous. Based on the these data, which one of the following statements is correct ? [BHU 1994]

Body cavity surrounding alimentary canal but it is not lined by cellular layer in which of the following [BHU 2003]

In man, brown eyes are dominant over blue and dark hair dominant over red hair . A man with brown eyes and red hair marries a woman with blue eyes and dark hair. They got two children; one resembling the man, the other the woman. The genotypes of the man and woman were

Cells acquire and use energy to synthesize, store and degrade and eliminate substance through chemical reactions called

Both from phyllogenetic and ontogenetic point of view, which tissue is regarded as most primitive

Most important criteria used for the present day classification of living organisms is based on

Organisms which obtain energy by the oxidation of reduced inorganic compounds are called [CBSE PMT 2002]

Bicarpellary syncarpous gynoecium, parietal placentation, tetradynamous stamens and siliqua fruit are characteristic features of family [AIIMS 1984; CPMT 1984, 98; DPMT 1986; MP PMT 1986; CBSE PMT 1992; APMEE 1993; RPMT 1994, 95]

The main difference between Gymnophiona (Apoda) and Urodela is that Urodela [MP PMT 1986]

When whole blood is stored with an anticoagulant at \[4{}^\circ C\], the \[{{K}^{+}}\]ions move out from the RBC into the plasma. The most likely reasons for this is that [AIIMS 1982; DPMT 1992]

A closed system is one which

Tricarpellary axile placentation is characteristic of [DPMT 1978, 87]

In a medico-legal case of accidental interchange between two babies in a hospital, the baby of blood group A could not be rightly given to a people [MP PMT 1990]

In amphibians the heart is